KNOGO NORTH AMERICA INC
8-K, 1996-10-22
COMMUNICATIONS EQUIPMENT, NEC
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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549
                                  ------------
                                    FORM 8-K

                                 CURRENT REPORT

                         Pursuant to Section 13 or 15(d)
                     Of the Securities Exchange Act of 1934


         Date of Report (date of earliest event reported) OCTOBER 10, 1996


                            KNOGO NORTH AMERICA INC.
             (Exact name of registrant as specified in its charter)


   DELAWARE                       1-13528                     11-3231714
(State or other jurisdiction of  (Commission                 (IRS Employer
    incorporation)               File Number)                  ID Number)


 350 WIRELESS BOULEVARD, HAUPPAUGE, NEW YORK                     11788
 (Address of principal executive offices)                      (Zip Code)

       Registrant's Telephone Number, including area code: (516) 232-2100


          (Former name or former address, if changed since last report)


<PAGE>

  Item 5. OTHER EVENTS.

         KNOGO North America Inc. ("KNOGO") and Video Sentry Corporation, a
Minnesota corporation ("Video Sentry"), announced on October 10, 1996 the
signing of a definitive merger agreement (the "Merger Agreement") which will
result in the formation of a new publicly traded entity to be called Sentry
Technology Corporation ("Sentry"). The merger agreement provides for Sentry, a
newly-formed Delaware corporation, to issue one share of common stock for each
one share of Video Sentry common stock outstanding at the effective time of the
merger. Sentry will issue one share of common stock and one share of Class A
Preferred Stock (the "Class A Preferred Stock") for each 1.2022 shares of KNOGO
common stock outstanding at the effective time. As contemplated by the Merger
Agreement, the Sentry Class A Preferred Stock will have a face value of $5.00
per share and a dividend rate of 5.0% (the first two years of which are
pay-in-kind). The Class A Preferred Stock will be non-voting and subject to a
mandatory redemption four years from the date of issuance. The redemption price
will be equal to $5.00 per share of Class A Preferred Stock (plus accrued and
unpaid dividends as of the redemption date) plus the amount, if any, by which
the market price of Sentry's common stock at the time of redemption exceeds
$6.50 per share. The Class A Preferred Stock is non-convertible, but the
redemption price may, in certain circumstances, be paid in common stock at
Sentry's option.

         The Boards of Directors of both KNOGO and Video Sentry have each
unanimously approved the transaction.

Item 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

       (a) Financial Statements - None.

       (a) Pro forma financial information - None.

       (c) Exhibits.

         2.2   Agreement and Plan of Reorganization and Merger by and among
               Video Sentry Corporation, KNOGO North America Inc., Sentry 
               Technology Corporation, Viking Merger Corp. and Strip Merger 
               Corp. dated as of October 10, 1996.

         2.3   Form of Stockholder Support/Voting Agreement to be entered into 
               by KNOGO North America Inc. and Video Sentry Corporation and 
               certain stockholders. 

         99.1  Press Release.

<PAGE>

                                   SIGNATURES


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                        KNOGO NORTH AMERICA INC.


                                       By:/s/ Peter J. Mundy
                                           Peter J. Mundy
                                           Vice President-Finance,
                                           Secretary and Treasurer

Dated:  October 22, 1996


<PAGE>


                                  EXHIBIT INDEX


                                                                    Page No. in
                                                                   Sequentially
Exhibit                                                               Numbered
Number                      Description                               Document

2.2     Agreement and Plan of Reorganization and Merger by and among
        Video Sentry Corporation, KNOGO North America Inc., Sentry
        Technology Corporation, Viking Merger Corp. and Strip Merger
        Corp. dated as of October 10, 1996.

2.3     Form of Stockholder Support/Voting Agreement to be entered into
        by KNOGO North America Inc. and Video Sentry Corporation
        and certain stockholders.

99.1    Press Release.



                              AGREEMENT AND PLAN OF

                            REORGANIZATION AND MERGER

                                  by and among

                            VIDEO SENTRY CORPORATION,

                            KNOGO NORTH AMERICA INC.,

                          SENTRY TECHNOLOGY CORPORATION

                               VIKING MERGER CORP.

                                       and

                               STRIP MERGER CORP.


                          Dated as of October 10, 1996

<PAGE>
                                TABLE OF CONTENTS

                                                                      PAGE

ARTICLE I             SENTRY.........................................  2

         1.1          Certificate of Incorporation and Bylaws........  2
         1.2          Directors and Officers.........................  2

ARTICLE II            THE MERGERS....................................  2

         2.1          The VIDEO Merger...............................  2
         2.2          VIDEO Effective Time...........................  2
         2.3          The KNOGO Merger...............................  3
         2.4          KNOGO Effective Time...........................  3
         2.5          Certificates of Incorporation and Bylaws.......  3
         2.6          Directors and Officers.........................  3
         2.7          Effective Time.................................  4
         2.8          Closing........................................  4

ARTICLE III           CONVERSION OF SHARES...........................  4

         3.1          VIDEO Stock....................................  4
         3.2          KNOGO Stock....................................  5
         3.3          SENTRY Stock...................................  5
         3.4          VMC Stock......................................  6
         3.5          SMC Stock......................................  6
         3.6          Exchange of Certificate........................  6
         3.7          Adjustment of Merger Consideration............. 10
         3.8          VIDEO Stock Options............................ 10
         3.9          KNOGO Stock Options............................ 11
         3.10         Stockholder Approval........................... 11

ARTICLE IV            REPRESENTATIONS AND WARRANTIES OF KNOGO........ 12

         4.1          Organization and Qualification................. 12
         4.2          Capitalization................................. 12
         4.3          Authorization and Validity of Agreement........ 13
         4.4          Consents and Approvals......................... 14
         4.5          No Violation................................... 14
         4.6          SEC Reports; Financial Statements.............. 15
         4.7          Joint Proxy Statement/Prospectus............... 16
         4.8          Compliance with Law............................ 16
         4.9          Absence of Certain Changes..................... 17
         4.10         No Undisclosed Liabilities..................... 17
         4.11         Litigation..................................... 17
         4.12         Employee Benefit Matters....................... 17
         4.13         Taxes.......................................... 18
         4.14         Intellectual Property.......................... 19
         4.15         Labor Matters.................................. 19
         4.16         Brokers and Finders............................ 19
         4.17         Opinion of Financial Advisor................... 19
         4.18         Section 351/Reorganization Treatment........... 19
         4.19         VIDEO Shares Ownership......................... 19

ARTICLE V             REPRESENTATIONS AND WARRANTIES OF VIDEO,
                      SENTRY, VMC AND SMC............................ 20

         5.1          Organization and Qualification................. 20
         5.2          Capitalization................................. 20
         5.3          Authorization and Validity of Agreement........ 23
         5.4          Consents and Approvals......................... 23
         5.5          No Violation................................... 24
         5.6          SEC Reports; Financial Statements.............. 24
         5.7          Joint Proxy Statement/Prospectus............... 25
         5.8          Compliance with Law............................ 25
         5.9          Absence of Certain Changes..................... 26
         5.10         No Undisclosed Liabilities..................... 26
         5.11         Litigation..................................... 26
         5.12         Employee Benefit Matters....................... 27
         5.13         Taxes.......................................... 27
         5.14         Intellectual Property.......................... 28
         5.15         Labor Matters.................................. 28
         5.16         Brokers and Finders............................ 28
         5.17         Opinion of Financial Advisor................... 28
         5.18         Section 351/Reorganization Treatment........... 28
         5.19         KNOGO Shares Ownership......................... 29
         5.20         Operations of SENTRY, VMC and SMC.............. 29

ARTICLE VI            COVENANTS...................................... 29

         6.1          Conduct of the Business of KNOGO and VIDEO
                      Pending the Reorganization..................... 29
         6.2          Access; Confidentiality........................ 31
         6.3          Meetings of Stockholders....................... 31
         6.4          Reasonable Efforts............................. 31
         6.5          Public Announcements........................... 32
         6.6          Acquisition Proposals.......................... 32
         6.7          Registration Statement and Joint Proxy
                      Statement/Prospectus........................... 33
         6.8          Listing Application............................ 34
         6.9          Affiliate Letters.............................. 34
         6.10         D&O Indemnification and Insurance.............. 35
         6.11         Employee Benefits.............................. 36
         6.12         Fees and Expenses.............................. 37
         6.13         Cancellation of SENTRY Common Stock............ 38

ARTICLE VII           CLOSING CONDITIONS............................. 38

         7.1          Conditions to Obligations of Each Party to
                      Effect the Reorganization...................... 38
         7.2          Conditions Precedent to the Obligations of
                      KNOGO.......................................... 39
         7.3          Conditions Precedent to the Obligations of
                      VIDEO, SENTRY, VMC and SMC..................... 40

ARTICLE VIII  TERMINATION............................................ 41

         8.1          Termination.................................... 41
         8.2          Effect of Termination.......................... 42

ARTICLE IX            MISCELLANEOUS.................................. 43

         9.1          Nonsurvival of Representations, Warranties and
                      Covenants...................................... 43
         9.2          Notices........................................ 43
         9.3          Certain Definitions............................ 44
         9.4          Entire Agreement............................... 45
         9.5          Assignment; Binding Effect..................... 45
         9.6          Amendments..................................... 46
         9.7          Waivers........................................ 46
         9.8          Validity....................................... 46
         9.9          Captions....................................... 46
         9.10         Counterparts................................... 46
         9.11         Governing Law.................................. 46
<PAGE>


                 AGREEMENT AND PLAN OF REORGANIZATION AND MERGER


                  THIS AGREEMENT AND PLAN OF REORGANIZATION AND MERGER, dated as
of October 10, 1996, (the "AGREEMENT") is by and among VIDEO SENTRY CORPORATION,
a Minnesota corporation ("VIDEO"), KNOGO NORTH AMERICA INC., a Delaware
corporation ("KNOGO"), SENTRY TECHNOLOGY CORPORATION, a Delaware corporation
("SENTRY"), VIKING MERGER CORP., a Minnesota corporation and a wholly owned
subsidiary of SENTRY formed solely to effectuate the transactions contemplated
hereby ("VMC"), and STRIP MERGER CORP., a Delaware corporation and wholly owned
subsidiary of SENTRY formed solely to effectuate the transactions contemplated
hereby ("SMC").

                                    RECITALS

                  WHEREAS, the Boards of Directors of VIDEO and KNOGO each have
approved, and deem it advisable and in the best interests of their respective
companies and stockholders to consummate the reorganization and mergers provided
for herein, pursuant to which SENTRY will acquire all of the common stock of
each of VIDEO and KNOGO through mergers of VMC and SMC, subsidiaries of SENTRY,
with and into each of VIDEO and KNOGO, respectively, and accordingly have agreed
to effect the Reorganization (as defined in Section 2.3 below) upon the terms
and subject to the conditions set forth herein;

                  WHEREAS, it is intended that, for Federal income tax purposes,
(i) the VIDEO Merger (as hereinafter defined) qualify as a reorganization under
the provisions of Section 368(a) of the United States Internal Revenue Code of
1986, as amended, and the regulations thereunder (the "CODE") and/or as an
exchange under the provisions of Section 351 of the Code and (ii) that the KNOGO
Merger (as hereinafter defined) qualify as an exchange under the provisions of
Section 351 of the Code; and

                  WHEREAS, KNOGO, VIDEO, SENTRY, VMC and SMC desire to make
certain representations, warranties, covenants and agreements in connection with
this Agreement.

                  NOW, THEREFORE, in consideration of the foregoing and of the
respective representations, warranties, covenants and agreements set forth in
this Agreement, the parties hereto hereby agree as follows:

<PAGE>

                                    AGREEMENT

                                    ARTICLE I

                                     SENTRY

     1.1 CERTIFICATE OF INCORPORATION AND BYLAWS. At the Effective Time (as
defined in Section 2.7), the certificate of incorporation of SENTRY (the "SENTRY
CERTIFICATE OF Incorporation") shall be in form substantially similar to EXHIBIT
A attached hereto. At the Effective Time, the Bylaws of SENTRY (the "SENTRY
BYLAWS") shall be in form as mutually agreed upon by VIDEO and KNOGO.

     1.2 DIRECTORS AND OFFICERS. At the Effective Time, the initial directors of
SENTRY shall be as set forth in EXHIBIT B hereto, each to hold office in
accordance with the SENTRY Certificate of Incorporation and SENTRY Bylaws until
such directors' successors are elected and qualified. The initial officers of
SENTRY shall be as set forth in EXHIBIT B hereto and shall serve at the
discretion of its Board of Directors in accordance with the SENTRY Bylaws.


                                   ARTICLE II

                              THE MERGERS; CLOSING

     2.1 THE VIDEO MERGER. Upon the terms and subject to the conditions of this
Agreement and in accordance with applicable provisions of the Minnesota Business
Corporation Act (the "MINNESOTA ACT"), at the VIDEO Effective Time (as defined
in Section 2.2 below), VMC shall be merged with and into VIDEO (the "VIDEO
MERGER"). As a result of the VIDEO Merger, the separate corporate existence of
VMC shall cease and VIDEO shall continue as the surviving corporation of the
VIDEO Merger (the "VIDEO SURVIVING CORPORATION").

     2.2 VIDEO EFFECTIVE TIME. As promptly as practicable after the satisfaction
or, if permissible, waiver of the conditions set forth in Article VII, the
parties hereto will cause an articles of merger (the "ARTICLES OF MERGER") to be
executed and filed with the Secretary of State of the State of Minnesota in
accordance with the Minnesota Act. The VIDEO Merger shall become effective at
such time as the Articles of Merger are filed with the Secretary of State of the
State of Minnesota in accordance with the Minnesota Act, or at such later time
as may be specified in the Articles of Merger in accordance with applicable law
(such time and date herein referred to as the "VIDEO EFFECTIVE TIME"). At the
VIDEO Effective Time, the VIDEO Merger shall have the effects set forth in the
applicable provisions of the Minnesota Act.

     2.3 THE KNOGO MERGER. Upon the terms and subject to the conditions of this
Agreement and in accordance with applicable provisions of the Delaware General
Corporation Law (the "DGCL"), at the KNOGO Effective Time (as defined in Section
2.4 below), SMC shall be merged with and into KNOGO (the "KNOGO
MERGER")(together with the VIDEO Merger, the "REORGANIZATION"). As a result of
the KNOGO Merger, the separate corporate existence of SMC shall cease and KNOGO
shall continue as the surviving corporation of the KNOGO Merger (the "KNOGO
SURVIVING CORPORATION").

     2.4 KNOGO EFFECTIVE TIME. As promptly as practicable after the satisfaction
or, if permissible, waiver of the conditions set forth in Article VII, the
parties hereto will cause a certificate of merger (the "CERTIFICATE OF MERGER")
to be executed and filed with the Secretary of State of the State of Delaware in
accordance with the DGCL. The KNOGO Merger shall become effective at such time
as the Certificate of Merger is filed with the Secretary of State of the State
of Delaware in accordance with the DGCL, or at such later time as may be
specified in the Certificate of Merger in accordance with applicable law (such
time and date herein referred to as the "KNOGO EFFECTIVE TIME"). At the KNOGO
Effective Time, the KNOGO Merger shall have the effects set forth in the
applicable provisions of the DGCL.

     2.5 CERTIFICATES OF INCORPORATION AND BYLAWS. (a) The Certificate of
Incorporation of VMC as in effect immediately prior to the VIDEO Effective Time
(the "VMC CERTIFICATE") shall be the Certificate of Incorporation of the VIDEO
Surviving Corporation immediately after the VIDEO Effective Time.

                  (b) The Certificate of Incorporation of SMC as in effect
immediately prior to the KNOGO Effective Time (the "SMC CERTIFICATE") shall be
the Certificate of Incorporation of the KNOGO Surviving Corporation immediately
after the KNOGO Effective Time.

                  (c) The Bylaws of VMC as in effect immediately prior to the
VIDEO Effective Time (the "VMC BYLAWS") shall be the Bylaws of the VIDEO
Surviving Corporation immediately after the VIDEO Effective Time.

                  (d) The Bylaws of SMC as in effect immediately prior to the
KNOGO Effective Time (the "SMC BYLAWS") shall be the Bylaws of the KNOGO
Surviving Corporation immediately after the KNOGO Effective Time.

     2.6 DIRECTORS AND OFFICERS. (a) The directors of VMC immediately prior to
the VIDEO Effective Time shall be the directors of the VIDEO Surviving
Corporation as of the VIDEO Effective Time and until their successors are duly
appointed or elected in accordance with applicable law.

                  (b) The directors of SMC immediately prior to the KNOGO
Effective Time shall be the directors of the KNOGO Surviving Corporation as of
the KNOGO Effective Time and until their successors are duly appointed or
elected in accordance with applicable law.

                  (c) The officers of VIDEO immediately prior to the VIDEO
Effective Time shall be the officers of the VIDEO Surviving Corporation as of
the VIDEO Effective Time until their successors are duly appointed or elected in
accordance with applicable law.

                  (d) The officers of KNOGO immediately prior to the KNOGO
Effective Time shall be the officers of the KNOGO Surviving Corporation as of
the KNOGO Effective Time until their successors are duly appointed or elected in
accordance with applicable law.

     2.7 EFFECTIVE TIME. The term "EFFECTIVE TIME" shall mean the time and date
which is (A) the later of (i) the VIDEO Effective Time and (ii) the KNOGO
Effective Time, or (B) such other time and date as may be agreed to in writing
by VIDEO and KNOGO. The parties hereto agree that each will use its best efforts
to ensure that the VIDEO Effective Time and the KNOGO Effective Time occur upon
the same date and at the same time.

     2.8 CLOSING. Unless this Agreement shall have been terminated pursuant to
Article VIII and subject to the satisfaction or, if permissible, waiver of the
conditions set forth in Article VII, the consummation of the VIDEO Merger, the
KNOGO Merger, and the other transactions contemplated hereby (the "CLOSING")
shall take place at the offices of Dewey Ballantine, 1301 Avenue of the
Americas, New York, New York 10019, as promptly as practicable following the
satisfaction or, if permissible, waiver of the conditions set forth in Article
VII, unless another place, date or time is agreed to in writing by VIDEO and
KNOGO.


                                   ARTICLE III

                              CONVERSION OF SHARES

     3.1 VIDEO STOCK. At the VIDEO Effective Time, by virtue of the VIDEO Merger
and without any action on the part of any of the parties hereto or the holders
of any shares of the capital stock of SENTRY, VIDEO OR KNOGO, each share of
VIDEO common stock, par value $0.01 per share (the "VIDEO SHARES"), which is
issued and outstanding immediately prior to the VIDEO Effective Time shall be
converted into and represent the right to receive one share of common stock, par
value $0.001 per share, of SENTRY ("SENTRY COMMON STOCK") (the "VIDEO MERGER
CONSIDERATION"). All such VIDEO Shares shall no longer be outstanding and shall
automatically be canceled and extinguished and shall cease to exist, and each
certificate which immediately prior to the VIDEO Effective Time evidenced any
such VIDEO Shares ("VIDEO CERTIFICATES") shall thereafter represent the right to
receive (without interest), upon surrender of such VIDEO Certificate in
accordance with the provisions of Section 3.6, the VIDEO Merger Consideration
multiplied by the number of VIDEO Shares evidenced by such VIDEO Certificate.
The holders of VIDEO Certificates previously evidencing VIDEO Shares outstanding
immediately prior to the VIDEO Effective Time shall cease to have any rights
with respect thereto (including, without limitation, any rights to vote or to
receive dividends and distributions in respect of such VIDEO Shares), except as
otherwise provided herein or by law. At the VIDEO Effective Time, each VIDEO
Share held in VIDEO's treasury immediately prior to the Effective Time shall, by
virtue of the VIDEO Merger, be canceled and retired and cease to exist, without
any conversion thereof. All other classes of VIDEO stock held in treasury shall
also be canceled.

     3.2 KNOGO STOCK. At the KNOGO Effective Time, by virtue of the KNOGO Merger
and without any action on the part of any of the parties hereto or the holders
of any shares of the capital stock of SENTRY, VIDEO OR KNOGO, each 1.2022 shares
of KNOGO common stock, par value $0.01 per share (the "KNOGO Shares"), which is
issued and outstanding immediately prior to the KNOGO Effective Time shall be
converted into and represent the right to receive one share of SENTRY Common
Stock (the "KNOGO COMMON STOCK CONSIDERATION"), plus one share of preferred
stock, par value $0.001 per share, of SENTRY ("SENTRY CLASS A PREFERRED STOCK";
such SENTRY Class A Preferred Stock having the terms set forth in EXHIBIT A
attached hereto) (together with the KNOGO Common Stock Consideration, the "KNOGO
MERGER CONSIDERATION" and with the VIDEO Merger Consideration, collectively, the
"Merger Consideration"). All such KNOGO Shares shall no longer be outstanding
and shall automatically be canceled and extinguished and shall cease to exist,
and each certificate which immediately prior to the KNOGO Effective Time
evidenced any such KNOGO Shares ("KNOGO CERTIFICATES") shall thereafter
represent the right to receive (without interest), upon surrender of such KNOGO
Certificate in accordance with the provisions of Section 3.6, the KNOGO Merger
Consideration multiplied by the number of KNOGO Shares evidenced by such KNOGO
Certificate. The holders of KNOGO Certificates previously evidencing KNOGO
Shares outstanding immediately prior to the KNOGO Effective Time shall cease to
have any rights with respect thereto (including, without limitation, any rights
to vote or to receive dividends and distributions in respect of such KNOGO
Shares), except as otherwise provided herein or by law. At the KNOGO Effective
Time, each KNOGO Share held in KNOGO's treasury immediately prior to the KNOGO
Effective Time shall, by virtue of the KNOGO Merger, be canceled and retired and
cease to exist, without any conversion thereof. All other classes of KNOGO stock
held in treasury shall also be canceled.

     3.3 SENTRY STOCK. At the Effective Time, each share of SENTRY Common Stock,
which immediately prior to the Effective Time is owned by VIDEO, shall be
canceled and extinguished and shall cease to exist and no consideration shall be
delivered with respect thereto.

     3.4 VMC STOCK. Each share of common stock, par value $.001 per share, of
VMC (the "VMC COMMON STOCK") outstanding immediately prior to the VIDEO
Effective Time shall, by virtue of the VIDEO Merger and without any further
action by the holder thereof, be converted into and become one share of common
stock, par value $.001 per share, of the VIDEO Surviving Corporation (the "VIDEO
SURVIVING CORPORATION COMMON STOCK"). Each certificate which immediately prior
to the VIDEO Effective Time represented outstanding shares of VMC Common Stock
shall, on and after the VIDEO Effective Time, be deemed for all purposes to
represent the number of shares of VIDEO Surviving Corporation Common Stock into
which the shares of VMC Common Stock represented by such certificate shall have
been converted pursuant to this Section 3.4.

     3.5 SMC STOCK. Each share of common stock, par value $.001 per share, of
SMC (the "SMC COMMON STOCK") outstanding immediately prior to the KNOGO
Effective Time shall, by virtue of the KNOGO Merger and without any further
action by the holder thereof, be converted into and become one share of common
stock, par value $.001 per share, of the KNOGO Surviving Corporation (the "KNOGO
SURVIVING CORPORATION COMMON STOCK"). Each certificate which immediately prior
to the KNOGO Effective Time represented outstanding shares of SMC Common Stock
shall, on and after the KNOGO Effective Time, be deemed for all purposes to
represent the number of shares of KNOGO Surviving Corporation Common Stock into
which the shares of SMC Common Stock represented by such certificate shall have
been converted pursuant to this Section 3.5.

     3.6 EXCHANGE OF CERTIFICATES. (a) As of the Effective Time, SENTRY shall
deposit, or shall cause to be deposited, with an exchange agent mutually
selected by VIDEO and KNOGO (the "EXCHANGE AGENT"), for the benefit of the
holders of VIDEO Shares and KNOGO Shares, for exchange in accordance with this
Article III, certificates representing the shares of SENTRY Common Stock, SENTRY
Class A Preferred Stock and cash in lieu of fractional shares (such cash and
certificates for shares of SENTRY Common Stock and SENTRY Class A Preferred
Stock, together with any dividends or distributions with respect thereto
(relating to record dates for such dividends or distributions after the
Effective Time), being hereinafter referred to as the "EXCHANGE FUND") to be
issued pursuant to this Article III and paid pursuant to this Section 3.6 in
exchange for outstanding VIDEO Shares and KNOGO Shares.

                  (b) Promptly after the Effective Time, SENTRY shall cause the
Exchange Agent to mail to each holder of record of VIDEO Shares (i) a letter of
transmittal which shall specify that delivery shall be effected, and risk of
loss and title to such VIDEO Shares shall pass, only upon delivery of the VIDEO
Certificates representing such VIDEO Shares to the Exchange Agent and which
shall be in such form and have such other provisions as SENTRY may reasonably
specify and (ii) instructions for use in effecting the surrender of such VIDEO
Certificates in exchange for certificates representing shares of SENTRY Common
Stock and cash in lieu of fractional shares. Upon surrender of a VIDEO
Certificate for cancellation to the Exchange Agent together with such letter of
transmittal, duly executed and completed in accordance with the instructions
thereto, the holder of VIDEO Shares represented by such VIDEO Certificate shall
be entitled to receive in exchange therefor (x) a certificate representing that
number of whole shares of SENTRY Common Stock and (y) a check representing the
amount of cash in lieu of fractional shares, if any, and unpaid dividends and
distributions, if any, which such holder has the right to receive in respect of
the VIDEO Certificate surrendered pursuant to the provisions of this Article
III, after giving effect to any required withholding tax, and the VIDEO Shares
represented by the VIDEO Certificate so surrendered shall forthwith be canceled.
No interest will be paid or accrued on the cash in lieu of fractional shares and
unpaid dividends and distributions, if any, payable to holders of VIDEO Shares.
In the event of a transfer of ownership of VIDEO Shares which is not registered
in the transfer records of VIDEO, a certificate representing the proper number
of shares of SENTRY Common Stock, together with a check for the cash to be paid
in lieu of fractional shares, may be issued to such a transferee if the VIDEO
Certificate representing such VIDEO Shares is presented to the Exchange Agent,
accompanied by all documents required to evidence and effect such transfer and
to evidence that any applicable stock transfer taxes have been paid.

                  (c) Promptly after the Effective Time, SENTRY shall cause the
Exchange Agent to mail to each holder of record of KNOGO Shares (i) a
letter of transmittal which shall specify that delivery shall be effected, and
risk of loss and title to such KNOGO Shares shall pass, only upon delivery of
the KNOGO Certificates representing such KNOGO Shares to the Exchange Agent and
which shall be in such form and have such other provisions as SENTRY may
reasonably specify and (ii) instructions for use in effecting the surrender of
such KNOGO Certificates in exchange for certificates representing shares of
SENTRY Common Stock, SENTRY Class A Preferred Stock and cash in lieu of
fractional shares. Upon surrender of a KNOGO Certificate for cancellation to the
Exchange Agent together with such letter of transmittal, duly executed and
completed in accordance with the instructions thereto, the holder of KNOGO
Shares represented by such KNOGO Certificate shall be entitled to receive in
exchange therefor (x) a certificate representing that number of whole shares of
SENTRY Common Stock, (y) a certificate representing that number of whole shares
of SENTRY Class A Preferred Stock, and (z) a check representing the amount of
cash in lieu of fractional shares, if any, and unpaid dividends and
distributions, if any, which such holder has the right to receive in respect of
the KNOGO Certificate surrendered pursuant to the provisions of this Article
III, after giving effect to any required withholding tax, and the KNOGO Shares
represented by the KNOGO Certificate so surrendered shall forthwith be canceled.
No interest will be paid or accrued on the cash in lieu of fractional shares and
unpaid dividends and distributions, if any, payable to holders of KNOGO Shares.
In the event of a transfer of ownership of KNOGO Shares which is not registered
in the transfer records of KNOGO, a certificate representing the proper number
of shares of SENTRY Common Stock and SENTRY Class A Preferred Stock and a check
for the cash to be paid in lieu of fractional shares, may be issued to such a
transferee if the KNOGO Certificate representing such KNOGO Shares is presented
to the Exchange Agent, accompanied by all documents required to evidence and
effect such transfer and to evidence that any applicable stock transfer taxes
have been paid.

                  (d) Notwithstanding any other provisions of this Agreement, no
dividends or other distributions declared after the Effective Time on SENTRY
Common Stock or SENTRY Class A Preferred Stock shall be paid with respect to any
shares represented by a VIDEO or KNOGO Certificate, as the case may be, until
such Certificate is surrendered for exchange as provided herein. Subject to the
effect of applicable laws, following surrender of any such VIDEO or KNOGO
Certificate, there shall be paid to the holder of the certificates representing
whole shares of SENTRY Common Stock or SENTRY Class A Preferred Stock issued in
exchange therefor, without interest, (i) at the time of such surrender, the
amount of dividends or other distributions with a record date after the
Effective Time theretofore payable with respect to such whole shares of SENTRY
Common Stock or SENTRY Class A Preferred Stock and not paid, less the amount of
any withholding taxes which may be required thereon, and (ii) at the appropriate
payment date, the amount of dividends or other distributions with a record date
after the Effective Time but prior to surrender and a payment date subsequent to
surrender payable with respect to such whole shares of SENTRY Common Stock or
SENTRY Class A Preferred Stock, less the amount of any withholding taxes which
may be required thereon.

                  (e) At or after the VIDEO Effective Time, there shall be no
transfers on the stock transfer books of VIDEO of the VIDEO Shares which were
outstanding immediately prior to the VIDEO Effective Time. At or after the KNOGO
Effective Time, there shall be no transfers on the stock transfer books of KNOGO
of the KNOGO Shares which were outstanding immediately prior to the KNOGO
Effective Time. If, after the Effective Time, VIDEO or KNOGO Certificates are
presented to SENTRY, they shall be canceled and exchanged for certificates for
shares of SENTRY Common Stock (and SENTRY Class A Preferred Stock in the case of
KNOGO Shares) and cash in lieu of fractional shares, if any, deliverable in
respect thereof pursuant to this Agreement in accordance with the procedures set
forth in this Article III. Certificates surrendered for exchange by any person
constituting an "affiliate" of KNOGO or VIDEO for purposes of Rule 145(c) under
the Securities Act of 1933, as amended (the "SECURITIES Act"), shall not be
exchanged until SENTRY has received a written agreement from such person as
provided in Section 6.9.

                  (f) No fractional shares of SENTRY Common Stock or SENTRY
Class A Preferred Stock shall be issued pursuant hereto. In lieu of the issuance
of any fractional share of SENTRY Common Stock or SENTRY Class A Preferred Stock
pursuant to Section 3.1 and Section 3.2, cash adjustments will be paid to
holders in respect of any fractional share of SENTRY Common Stock or SENTRY
Class A Preferred Stock that would otherwise be issuable, and the amount of such
cash adjustment shall be as follows: (i) for SENTRY Common Stock, the cash
adjustment shall be equal to such fractional proportion of the average of the
closing sales prices of VIDEO Common Stock as reported on the NASDAQ Stock
Market's National Market ("NASDAQ/NM") for the five consecutive trading days
preceding the Effective Time; and (ii) for SENTRY Class A Preferred Stock, the
cash adjustment shall be equal to such fractional proportion of the SENTRY Class
A Preferred Stock Face Value (as such term is defined in the SENTRY Certificate
of Incorporation Class A Preferred Stock provisions, attached hereto as EXHIBIT
A).

                  (g) Any portion of the Exchange Fund (including the proceeds
of any investments thereof and any shares of SENTRY Common Stock and SENTRY
Class A Preferred Stock) that remains unclaimed by the former stockholders of
KNOGO or VIDEO one year after the Effective Time shall be delivered to SENTRY.
Any former stockholder of KNOGO or VIDEO who has not theretofore complied with
this Article III shall thereafter look only to SENTRY for payment of their
shares of SENTRY Common Stock, SENTRY Class A Preferred Stock, cash in lieu of
fractional shares and unpaid dividends and distributions on the SENTRY Common
Stock and SENTRY Class A Preferred Stock deliverable in respect of each VIDEO or
KNOGO Share such stockholder holds as determined pursuant to this Agreement, in
each case, without any interest thereon.

                  (h) None of VIDEO, KNOGO, SENTRY, VMC, SMC, the Exchange Agent
or any other person shall be liable to any former holder of VIDEO Shares or
KNOGO Shares for any amount properly delivered to a public official pursuant to
applicable abandoned property, escheat or similar laws.

                  (i) In the event any VIDEO or KNOGO Certificate shall have
been lost, stolen or destroyed, upon the making of an affidavit of that fact by
the person claiming such Certificate to be lost, stolen or destroyed and, if
required by SENTRY, the posting by such person of a bond in such reasonable
amount as SENTRY may direct as indemnity against any claim that may be made
against it with respect to such Certificate, the Exchange Agent will issue in
exchange for such lost, stolen or destroyed Certificate the shares of SENTRY
Common Stock (and SENTRY Class A Preferred Stock in the case of KNOGO Shares)
and cash in lieu of fractional shares, and unpaid dividends and distributions on
shares of SENTRY Common Stock (and SENTRY Class A Preferred Stock in the case of
KNOGO Shares) as provided in this Section 3.6, deliverable in respect thereof
pursuant to this Agreement.

     3.7 ADJUSTMENT OF MERGER CONSIDERATION. In the event that, (i) subsequent
to the date of this Agreement but prior to the VIDEO Effective Time, the
outstanding shares of VIDEO shall have been changed into a different number of
shares or a different claim as a result of a stock split, reverse stock split,
stock dividend, subdivision, reclassification, split, combination, exchange,
recapitalization or other similar transaction, or (ii) subsequent to the date of
this Agreement but prior to the KNOGO Effective Time, the outstanding shares of
KNOGO shall have been changed into a different number of shares or a different
claim as a result of a stock split, reverse stock split, stock dividend,
subdivision, reclassification, split, combination, exchange, recapitalization or
other similar transaction, then the Merger Consideration shall be appropriately
adjusted.

     3.8 VIDEO STOCK OPTIONS. (a) At the VIDEO Effective Time, all outstanding
options and other rights to acquire shares granted to employees under any stock
option or purchase plan, program or similar arrangement (each, as amended, an
"OPTION Plan" and, such options and other rights, "STOCK OPTIONS") of VIDEO and,
with respect to employees and non-employees, all outstanding warrants to
purchase Video Shares (the "Warrants"), whether or not such Stock Options or
Warrants are then exercisable or vested, will be assumed by SENTRY and shall be
exercisable upon the same terms and conditions as under the applicable Warrant
or Option Plan and option agreement issued thereunder, except that (i) each such
Stock Option or Warrant shall be exercisable for that whole number of shares of
SENTRY Common Stock (to the nearest share) into which the number of VIDEO Shares
subject to such Stock Option or Warrant immediately prior to the Effective Time
would be converted under Section 3.1, and (ii) the option exercise price or
Warrant exercise price per share of SENTRY Common Stock shall be an amount equal
to the option exercise price or warrant exercise price per VIDEO Share of such
Stock Option or Warrant in effect immediately prior to the VIDEO Effective Time
divided by the VIDEO Merger Consideration (the option exercise price or Warrant
exercise price per VIDEO Share, as so determined, being rounded upwards to the
nearest full cent). No payment shall be made for fractional interests.

                  (b) Except as provided herein or as otherwise agreed to by the
parties and to the extent permitted by the Option Plans, the Option Plans of
VIDEO shall terminate as of the VIDEO Effective Time and any rights under any
provisions in any other plan, program or arrangement providing for the issuance
or grant by VIDEO of any interest in respect of the capital stock of VIDEO shall
be canceled as of the VIDEO Effective Time.

     3.9 KNOGO STOCK OPTIONS. (a) At the KNOGO Effective Time, all outstanding
options and other rights to acquire Shares granted to employees under any Option
Plan of KNOGO, whether or not then exercisable or vested, will be assumed by
SENTRY and shall be exercisable upon the same terms and conditions as under the
applicable Option Plan and option agreement issued thereunder, except that
(A)(i) each such Stock Option shall be exercisable for that whole number of
shares of SENTRY Common Stock (to the nearest share) into which the number of
KNOGO Shares subject to such Stock Option immediately prior to the Effective
Time would be converted under Section 3.2, and (ii) each such Stock Option shall
be exercisable for that whole number of shares of SENTRY Class A Preferred Stock
(to the nearest share) into which the number of KNOGO Shares subject to such
Stock Option immediately prior to the Effective Time would be converted under
Section 3.2, provided that if all of the issued and outstanding SENTRY Class A
Preferred Stock has been theretofore redeemed or converted in the manner set
forth in the SENTRY Certificate of Incorporation, attached hereto as EXHIBIT A,
then in lieu of the SENTRY Class A Preferred Stock, the holders of such Stock
Options shall receive the same consideration paid to the holders of SENTRY Class
A Preferred Stock upon such redemption or conversion, and (B) the option
exercise price per share of SENTRY Common Stock (including SENTRY Class A
Preferred Stock) shall be an amount equal to the option exercise price per KNOGO
Share of such Stock Option in effect immediately prior to the KNOGO Effective
Time divided by the KNOGO Common Stock Consideration (the option exercise price
per KNOGO Share, as so determined, being rounded upwards to the nearest full
cent). No payment shall be made for fractional interests.

                  (b) Except as provided herein or as otherwise agreed to by the
parties and to the extent permitted by the Option Plans, the Option Plans of
KNOGO shall terminate as of the KNOGO Effective Time and any rights under any
provisions in any other plan, program or arrangement providing for the issuance
or grant by KNOGO of any interest in respect of the capital stock of KNOGO shall
be canceled as of the KNOGO Effective Time.

     3.10 STOCKHOLDER APPROVAL. (a) This Agreement shall be submitted for
consideration and approval to the holders of VIDEO Shares at a special meeting
of stockholders duly held for such purpose by VIDEO (the "VIDEO STOCKHOLDERS'
MEETING").

                  (b) This Agreement shall be submitted for consideration and
approval to the holders of KNOGO Shares at a special meeting of stockholders
duly held for such purpose by KNOGO (the "KNOGO STOCKHOLDERS' MEETING").

                  (c) VIDEO and KNOGO shall coordinate with respect to the
timing of the VIDEO Stockholders' Meeting and the KNOGO Stockholders' Meeting
and shall endeavor to hold such meetings on the same day and time and as soon as
practicable after the date hereof. Subject to their fiduciary duties, the
respective boards of directors of VIDEO and KNOGO shall recommend that their
respective stockholders approve this Agreement and the transactions contemplated
hereby, and such recommendation shall be contained in the Joint Proxy
Statement/Prospectus (as defined in Section 6.7) of VIDEO and KNOGO included in
the Registration Statement (as defined in Section 6.7) and distributed to the
stockholders of VIDEO and KNOGO in connection with the VIDEO Stockholders'
Meeting and the KNOGO Stockholders' Meeting.

                  (d) SENTRY shall take any and all actions necessary for the
proper approvals and authorizations to be adopted by the boards of directors and
stockholders of SENTRY, VMC and SMC, respectively, to effectuate the
transactions contemplated hereby.

                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES
                                    OF KNOGO

     Except as set forth in KNOGO's disclosure schedule delivered to VIDEO in
connection with this Agreement (the "KNOGO DISCLOSURE SCHEDULE") or the KNOGO
SEC Documents (as defined in Section 4.6 below), KNOGO hereby represents and
warrants to VIDEO as follows:

     4.1 ORGANIZATION AND QUALIFICATION. Each of KNOGO and its subsidiaries (a)
is duly incorporated, validly existing and in good standing under the laws of
the jurisdiction of its incorporation or organization, (b) has requisite
corporate power and authority to own, lease and operate its properties and to
carry on its business as it is now being conducted and (c) is in good standing
and duly qualified to do business in each jurisdiction in which the transaction
of its business makes such qualification necessary, except where the failure to
be so organized, existing, qualified and in good standing or to have such power
or authority would not have a Material Adverse Effect (as defined in Section
9.3(d) below) on KNOGO. True and complete copies of the Certificate of
Incorporation and the By-Laws, as amended to date, of KNOGO and its subsidiaries
have been made available to VIDEO.

     4.2 CAPITALIZATION. (a) The authorized capital stock of KNOGO consists of
10,000,000 KNOGO Shares and 3,000,000 shares of preferred stock, par value $.01
per share (the "KNOGO PREFERRED STOCK"). As of the date of this Agreement, (i)
5,772,032 KNOGO Shares are issued and outstanding and no KNOGO Shares are held
in treasury, (ii) 678,700 KNOGO Shares are reserved for issuance pursuant to
outstanding Stock Options and 575,300 Shares are reserved for issuance in
respect of future grants of Stock Options and (iii) no shares of KNOGO Preferred
Stock are issued and outstanding. All outstanding KNOGO Shares are validly
issued, fully paid and nonassessable and are not subject to preemptive rights.
Except as disclosed in the KNOGO SEC Documents or in Section 4.2(a) of the KNOGO
Disclosure Schedule, there are no outstanding subscriptions, options, warrants,
calls, rights, commitments or any other agreements to which KNOGO is a party or
by which KNOGO is bound which obligate KNOGO to (i) issue, deliver or sell or
cause to be issued, delivered or sold any additional KNOGO Shares or any other
capital stock of KNOGO or any other securities convertible into, or exercisable
or exchangeable for, or evidencing the right to subscribe for, any such KNOGO
Shares or (ii) purchase, redeem or otherwise acquire any KNOGO Shares and any
other capital stock of KNOGO.

                  (b)      All outstanding KNOGO Shares are duly listed for
trading on the American Stock Exchange ("AMEX").

                  (c) KNOGO owns, directly or indirectly, all of the outstanding
shares of or other interests in each of its subsidiaries, which subsidiaries are
listed in Section 4.2(c) of the KNOGO Disclosure Schedule. Each of the
outstanding shares of capital stock of each of KNOGO's subsidiaries has been
duly authorized, is validly paid and nonassessable, and is owned, directly or
indirectly, by KNOGO, free and clear of all liens, pledges, security interests,
claims or other encumbrances, except for such liens, pledges, security
interests, claims or encumbrances that would not have a Material Adverse Effect
on KNOGO. Schedule 4.2(c) of the KNOGO Disclosure Schedule sets forth the
following information for each of KNOGO's subsidiaries, if applicable: (i) name
and jurisdiction of incorporation or organization; (ii) authorized capital stock
or share capital; and (iii) number of issued and outstanding shares of capital
stock or share capital.

                  (d) Except as set forth in Section 4.2(d) of the KNOGO
Disclosure Schedule, KNOGO does not own, directly or indirectly, any interest or
investment (whether equity or debt) in any corporation, partnership, joint
venture, business, trust or entity (other than investments in short-term
investment securities).

                  (e) Except as provided in the KNOGO SEC Documents or in
Section 4.2(e) of the KNOGO Disclosure Schedule, there are no voting trusts or
shareholder agreements to which KNOGO is a party with respect to the voting of
the capital stock of KNOGO.

     4.3 AUTHORIZATION AND VALIDITY OF AGREEMENT. KNOGO has the requisite
corporate power and authority to execute and deliver this Agreement and to
consummate the transactions contemplated hereby in accordance with the terms
hereof (subject to the approval and adoption of this Agreement and the KNOGO
Merger by the holders of a majority of the outstanding KNOGO Shares, and the
filing and recordation of appropriate merger documents as required by the DGCL).
KNOGO's Board of Directors (the "KNOGO BOARD") has duly authorized the
execution, delivery and performance of this Agreement by KNOGO, and
no other corporate proceedings on the part of KNOGO are necessary to authorize
this Agreement or the transactions contemplated hereby (other than the approval
and adoption of this Agreement and the KNOGO Merger by the holders of a majority
of the outstanding KNOGO Shares). This Agreement has been duly executed and
delivered by KNOGO and, assuming this Agreement constitutes the legal, valid and
binding obligation of VIDEO, SENTRY, VMC and SMC, constitutes the legal, valid
and binding obligation of KNOGO, enforceable against KNOGO in accordance with
its terms, except as may be limited by any bankruptcy, insolvency,
reorganization, moratorium, fraudulent conveyance or other similar laws
affecting the enforcement of creditors' rights generally or by general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law).

     4.4 CONSENTS AND APPROVALS. (a) Neither the execution and delivery of this
Agreement by KNOGO nor the consummation by KNOGO of the transactions
contemplated hereby will require on the part of KNOGO any consent, approval,
authorization or permit of, or filing with or notification to, any governmental
or regulatory authority, except (i) as may be required in connection with the
applicable requirements of the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended (the "HSR ACT"), (ii) pursuant to the applicable requirements
of the Securities Act, the Securities and Exchange Act of 1934, as amended (the
"EXCHANGE ACT"), the AMEX on which the KNOGO Shares are listed, and state
securities or "blue sky" laws and state takeover laws, (iii) the filing and
recordation of the Certificate of Merger pursuant to the DGCL and appropriate
documents with the relevant authorities of other states in which KNOGO is
authorized to do business, (iv) as set forth in Section 4.4 of the KNOGO
Disclosure Schedule or (v) where the failure to obtain such consent, approval,
authorization or permit, or to make such filing or notification, would not have
a Material Adverse Effect on KNOGO or prevent the consummation of the
transactions contemplated hereby. The affirmative vote of the holders of a
majority of the outstanding KNOGO Shares is the only vote of the holders of
capital stock of KNOGO necessary to approve the KNOGO Merger.

                  (b) The KNOGO Board has approved the execution of the
Support/Voting Agreements to be entered into between KNOGO and certain VIDEO
stockholders.

     4.5 NO VIOLATION. Except as set forth in Section 4.5 of the KNOGO
Disclosure Schedule, assuming the KNOGO Merger has been duly approved by the
holders of a majority of the outstanding KNOGO Shares, neither the execution and
delivery of this Agreement by KNOGO nor the consummation by KNOGO of the
transactions contemplated hereby will (a) conflict with or violate the Articles
of Incorporation, as amended, or By-Laws of KNOGO or any of its subsidiaries,
(b) result in a violation or breach of, constitute a default (with or without
notice or lapse of time, or both) under, give rise to any right of termination,
cancellation or acceleration of, or result in the imposition of any lien, charge
or other encumbrance on any assets or property of KNOGO or any of its
subsidiaries pursuant to any note, bond, mortgage, indenture, contract,
agreement, lease, license or other instrument or obligation to which KNOGO or
any of its subsidiaries is a party or by which KNOGO, any of its subsidiaries,
or any of their respective assets or properties are bound, except for such
violations, breaches and defaults (or rights of termination, cancellation or
acceleration or lien or other charge or encumbrance) as to which requisite
waivers or consents have been obtained or which would not have a Material
Adverse Effect on KNOGO or prevent the consummation of the transactions
contemplated hereby or (c) assuming the consents, approvals, authorizations or
permits and filings or notifications referred to in Section 4.4 and this Section
4.5 are duly and timely obtained or made and the approval of the KNOGO Merger by
the holders of a majority of the outstanding KNOGO Shares has been obtained,
violate any order, writ, injunction, decree, statute, rule or regulation
applicable to KNOGO, any of its subsidiaries or any of their respective assets
and properties, except for such violations which would not have a Material
Adverse Effect on KNOGO or prevent the consummation of the transactions
contemplated hereby.

     4.6 SEC REPORTS; FINANCIAL STATEMENTS. (a) Since January 1, 1995, KNOGO has
filed with the Securities and Exchange Commission (the "SEC") all forms,
reports, schedules, statements and other documents required to be filed by it
with the SEC pursuant to the Exchange Act, the Securities Act and the SEC's
rules and regulations thereunder (collectively, the "KNOGO SEC DOCUMENTS"). The
KNOGO SEC Documents, including, without limitation, any financial statements or
schedules included therein, at the time filed, or in the case of registration
statements on their respective effective dates, (i) complied as to form in all
material respects with the applicable requirements of the Exchange Act and the
Securities Act, as the case may be, and the applicable rules and regulations of
the SEC thereunder and (ii) did not at the time filed (or, in the case of
registration statements, at the time of effectiveness), contain any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary in order to make the statements made therein, in
light of the circumstances under which they were made, not misleading.

                  (b) Each of the consolidated financial statements of KNOGO
(including any related notes thereto) included in the KNOGO SEC Documents
(excluding the KNOGO SEC Documents described in Section 4.7 hereof) comply as to
form in all material respects with applicable accounting requirements and with
the published rules and regulations of the SEC with respect thereto, have been
prepared in accordance with generally accepted accounting principles applied on
a consistent basis during the period involved (except as may be indicated in
such financial statements or in the notes thereto or, in the case of unaudited
financial statements, as permitted by the requirements of Form 10-Q) and fairly
present in all material respects (subject, in the case of the unaudited
statements, to normal year-end adjustments and the absence of footnotes) the
financial position of KNOGO as of the dates thereof and the results of KNOGO's
operations and cash flows for the periods presented therein.

     4.7 JOINT PROXY STATEMENT/PROSPECTUS. None of the information supplied by
KNOGO to be included in the Joint Proxy Statement/Prospectus or the Registration
Statement will, in the case of the Joint Proxy Statement/Prospectus or any
amendments thereof or supplements thereto, at the time of the mailing of the
Joint Proxy Statement/Prospectus or any amendments thereof or supplements
thereto, and at the time of the KNOGO Stockholders' Meeting, or, in the case of
the Registration Statement, at the time it becomes effective and at the
Effective Time, contain any untrue statement of a material fact or omit to state
a material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading. The Joint Proxy Statement/Prospectus will comply as to form in
all material respects with the provisions of the Securities Act and the Exchange
Act. Notwithstanding the foregoing, KNOGO makes no representation or warranty
with respect to the statements made in the Joint Proxy Statement/Prospectus
based on information supplied by or on behalf of VIDEO, SENTRY, VMC or SMC or
any of their respective affiliates specifically for inclusion therein.

     4.8 COMPLIANCE WITH LAW. Except as set forth in the KNOGO SEC Documents or
in Section 4.8 of the KNOGO Disclosure Schedule, neither KNOGO nor any of its
subsidiaries is in violation of any applicable statute, rule, regulation, decree
or order of any governmental or regulatory authority applicable to KNOGO or its
subsidiaries, except for violations which would not have a Material Adverse
Effect on KNOGO. Without limiting the foregoing, except for matters which would
not have a Material Adverse Effect on KNOGO and those matters disclosed in the
KNOGO SEC Documents or in Section 4.8 of the KNOGO Disclosure Schedule, to the
Knowledge of KNOGO, (a) the businesses of KNOGO and its subsidiaries are being
conducted in compliance with applicable Environmental Laws (as defined below),
(b) the businesses of KNOGO and its subsidiaries have not made, caused or
contributed to any material release of any hazardous or toxic waste or substance
into the environment and (c) neither KNOGO nor any of its subsidiaries is
subject to any compliance agreement or settlement agreement from an alleged
violation of Environmental Laws. For purposes hereof, "ENVIRONMENTAL LAWS" shall
mean all applicable laws relating to pollution or protection of the environment,
including the Resource Conservation and Recovery Act, the Federal Water
Pollution Control Act, the Toxic Substances Control Act and the Comprehensive
Environmental Response, Compensation and Liability Act. Except as set forth in
the KNOGO SEC Documents or in Section 4.8 of the KNOGO Disclosure Schedule or as
contemplated or permitted by this Agreement, KNOGO and its subsidiaries hold all
permits, licenses, exemptions, orders and approvals of governmental and
regulatory authorities necessary for the conduct of their respective businesses,
as now being conducted, except where the failure to hold permits, licenses,
exemptions, orders and approvals would not have a Material Adverse Effect on
KNOGO.

     4.9 ABSENCE OF CERTAIN CHANGES. Except as disclosed in the KNOGO SEC
Documents or in Section 4.9 of the KNOGO Disclosure Schedule, since June 30,
1996 through the date of this Agreement, KNOGO and its subsidiaries have
conducted their respective businesses only in the ordinary course and there has
not been (a) any changes which could have a Material Adverse Effect on KNOGO;
(b) any declaration, setting aside or payment of any dividend or payment in
cash, stock or property or other distribution with respect to KNOGO's capital
stock; (c) any reclassification, combination, split, subdivision, redemption,
purchase or other acquisition, directly or indirectly, of any of KNOGO's capital
stock; (d) any material change in KNOGO's accounting principles, practices or
methods; or (e) any material alteration in the character or conduct of KNOGO's
business from that conducted and contemplated as of June 30, 1996.

     4.10 NO UNDISCLOSED LIABILITIES. Except (a) for liabilities incurred in the
ordinary course of business, (b) liabilities incurred in connection with the
transactions contemplated by this Agreement, (c) liabilities which would not
have a Material Adverse Effect on KNOGO and (d) as disclosed in the KNOGO SEC
Documents or as set forth in Section 4.10 of the KNOGO Disclosure Schedule, from
June 30, 1996 until the date of this Agreement, KNOGO and its subsidiaries had
not incurred any material liabilities that would be required to be reflected in
or reserved against a consolidated balance sheet of KNOGO prepared in accordance
with generally accepted accounting principles.

     4.11 LITIGATION. Except as disclosed in the KNOGO SEC Documents or in
Section 4.11 of the KNOGO Disclosure Schedule, there are no claims, actions,
proceedings or governmental investigations pending, nor has KNOGO or any of its
subsidiaries received notice of any threatened, claims, actions, proceedings or
governmental investigations against KNOGO or any of its subsidiaries by or
before any court or other governmental or regulatory body, which, if adversely
determined, would have a Material Adverse Effect on KNOGO. Neither KNOGO or any
of its subsidiaries nor their respective assets is subject to any outstanding
and unsatisfied order, writ, judgment, injunction or decree which would have a
Material Adverse Effect on KNOGO.

     4.12 EMPLOYEE BENEFIT MATTERS. All employee benefit plans and other benefit
arrangements covering employees of KNOGO and its subsidiaries (the "KNOGO
BENEFIT PLANS") are listed in Section 4.12 of the KNOGO Disclosure Schedule,
except such benefit plans and other benefit arrangements which are not material.
True and complete copies of the KNOGO Benefit Plans have been made available to
VIDEO. To the extent applicable, the KNOGO Benefit Plans comply in all material
respects with the requirements of the Employee Retirement Income Security Act of
1974, as amended ("ERISA"), and the Code, except as disclosed in Section 4.12(a)
of the KNOGO Disclosure Schedule, and any KNOGO Benefit Plan intended to be
qualified under Section 401(a) of the Code has been determined by the Internal
Revenue Service (the "IRS") to be so qualified. No KNOGO Benefit Plan is covered
by Title IV of ERISA or Section 412 of the Code. Neither KNOGO nor any of its
subsidiaries has incurred any liability or penalty under Section 4975 of the
Code or Section 502(i) of ERISA with respect to any KNOGO Benefit Plan, except
as would not have a Material Adverse Effect on KNOGO. Except as disclosed in
Section 4.12(a) of the KNOGO Disclosure Schedule, each KNOGO Benefit Plan has
been maintained and administered in all material respects in compliance with its
terms and with ERISA and the Code to the extent applicable thereto. To the
Knowledge of KNOGO, there are no pending, nor has KNOGO or any of its
subsidiaries received notice of any threatened, claims against or otherwise
involving any of the KNOGO Benefit Plans, except as would not have a Material
Adverse Effect on KNOGO. All material contributions required to be made as of
the date this Agreement to the KNOGO Benefit Plans have been made or provided
for. Neither KNOGO nor any entity under "common control" with KNOGO within the
meaning of Section 4001 of ERISA has contributed to, or been required to
contribute to, any "multi-employer plan" (as defined in Sections 3(37) and
4001(a)(3) of ERISA).

     4.13 TAXES. Except as disclosed in the KNOGO SEC Documents or in Section
4.13 of the KNOGO Disclosure Schedule, KNOGO and each of its subsidiaries (a)
have filed all federal, state and foreign tax returns required to be filed by
KNOGO or any of its subsidiaries for tax years ended prior to the date of this
Agreement, except for those tax returns the failure of which to file would not
have a Material Adverse Effect on KNOGO or for which requests for extensions
have been timely filed, and all such returns are complete in all material
respects, (b) have paid or accrued all taxes shown to be due and payable on such
returns, (c) have accrued all such taxes for such periods subsequent to the
periods covered by such returns ending on or prior to the date hereof and (d)
have "open" years for federal income tax returns only as set forth in the KNOGO
SEC Documents or in Section 4.13 of the KNOGO Disclosure Schedule. There are no
liens for taxes on the assets of KNOGO or any of its subsidiaries, except for
liens that would not have a Material Adverse Effect on KNOGO, and there is no
pending, nor has KNOGO or any of its subsidiaries received notice of any
threatened, tax audit, examination, refund litigation or adjustment in
controversy which, if determined adversely, would have a Material Adverse Effect
on KNOGO. Neither KNOGO nor any of its subsidiaries is a party to any agreement
providing for the allocation or sharing of taxes.

     4.14 INTELLECTUAL PROPERTY. To the Knowledge of KNOGO, KNOGO and its
subsidiaries own or possess rights in all patents, trademarks, tradenames,
copyrights and other intellectual property rights used in or necessary for the
conduct of the businesses of KNOGO and its subsidiaries as now operated
(collectively, "KNOGO INTELLECTUAL PROPERTY"), except where the failure to own
or possess any such KNOGO Intellectual Property would not have a Material
Adverse Effect on KNOGO. Neither KNOGO nor any of its subsidiaries has received
any notice that the products of KNOGO and its subsidiaries, or the use thereof,
violate, infringe or otherwise conflict with the Intellectual Property of third
parties, except for such violations, infringements or conflicts that would not
have a Material Adverse Effect on KNOGO or as disclosed in the KNOGO SEC
Documents or in Section 4.14 of the KNOGO Disclosure Schedule.

     4.15 LABOR MATTERS. Neither KNOGO nor any of its subsidiaries is a party
to, or bound by, any collective bargaining agreement, contract or other
agreement or understanding with a labor union or labor union organization. There
is no unfair labor practice or labor arbitration proceeding pending or, to the
Knowledge of KNOGO, threatened against KNOGO or any of its subsidiaries relating
to their respective businesses, except for any such proceeding that would not
have a Material Adverse Effect on KNOGO.

     4.16 BROKERS AND FINDERS. No broker, finder or investment bank has acted
directly or indirectly for KNOGO, nor has KNOGO incurred any obligation to pay
any brokerage, finder's or other fee or commission in connection with the
transactions contemplated hereby, other than Donald & Co. Securities, the fees
and expenses of which shall be borne by KNOGO.

     4.17 OPINION OF FINANCIAL ADVISOR. Donald & Co. Securities, KNOGO's
financial advisor, has delivered its opinion, dated the date of this Agreement,
to the KNOGO Board to the effect that, as of such date, the KNOGO Merger
Consideration is fair, from a financial point of view, to the holders of KNOGO
Shares.

     4.18 SECTION 351/REORGANIZATION TREATMENT. Neither KNOGO nor any KNOGO
subsidiary has taken or failed to take any action or has knowledge of any fact
or circumstance that is reasonably likely to, (i) prevent the KNOGO Merger from
qualifying as an exchange governed by Section 351 of the Code or (ii) prevent
the VIDEO Merger from constituting a reorganization within the meaning of
Section 368(a) of the Code or from qualifying as an exchange governed by Section
351 of the Code.

     4.19 VIDEO SHARES OWNERSHIP. Except as disclosed in Section 4.19 of the
KNOGO Disclosure Schedule, neither KNOGO nor any of its affiliates owns any
VIDEO Shares or other securities or rights convertible, exchangeable or
otherwise exercisable into VIDEO Shares.


                                    ARTICLE V

                         REPRESENTATIONS AND WARRANTIES
                          OF VIDEO, SENTRY, VMC AND SMC

     Except as set forth in VIDEO's disclosure schedule delivered to KNOGO in
connection with this Agreement (the "VIDEO DISCLOSURE SCHEDULE") or the VIDEO
SEC Documents (as defined in Section 3.6 below), VIDEO, SENTRY, VMC and SMC
hereby represent and warrant to KNOGO as follows:

     5.1 ORGANIZATION AND QUALIFICATION. Each of VIDEO, SENTRY, VMC and SMC (a)
is duly incorporated, validly existing and in good standing under the laws of
the jurisdiction of its incorporation, (b) has the requisite corporate power and
authority to own, lease and operate its properties and to carry on its business
as it is now being conducted and (c) is in good standing and duly qualified to
do business in each jurisdiction in which the transaction of its business makes
such qualification necessary, except where the failure to be so organized,
existing, qualified and in good standing or to have such power or authority
would not have a Material Adverse Effect on VIDEO, SENTRY, VMC or SMC. True and
complete copies of the Articles or Certificate of Incorporation, as the case may
be, and the By-Laws as amended to date, of VIDEO and its subsidiaries have been
made available to KNOGO.

     5.2 CAPITALIZATION. (a) The authorized capital stock of VIDEO consists of
10,000,000 VIDEO Shares. As of the date of this Agreement, (i) 4,841962 VIDEO
Shares are issued and outstanding and no VIDEO Shares are held in treasury, (ii)
370,000 VIDEO Shares are reserved for issuance pursuant to outstanding stock
options and 180,000 VIDEO Shares are reserved for issuance in respect of future
grants of stock options and (iii) 454,114 VIDEO Shares are reserved for issuance
pursuant to the warrants set forth in Section 5.2(a) of the VIDEO Disclosure
Schedule (the "WARRANTS"). All outstanding VIDEO Shares are validly issued,
fully paid and nonassessable and are not subject to preemptive rights. Except as
disclosed in the VIDEO SEC Documents (as defined in Section 5.6) or in Section
5.2(a) of the VIDEO Disclosure Schedule, there are no outstanding subscriptions,
options, warrants, calls, rights, commitments or any other agreements to which
VIDEO is a party or by which VIDEO is bound which obligate VIDEO to (i) issue,
deliver or sell or cause to be issued, delivered or sold any additional VIDEO
Shares or any other capital stock of VIDEO or any other securities convertible
into, or exercisable or exchangeable for, or evidencing the right to subscribe
for, any such VIDEO Shares or (ii) purchase, redeem or otherwise acquire any
VIDEO Shares and any other capital stock of VIDEO.

                  (b)      All outstanding VIDEO Shares are duly listed for
trading on the NASDAQ/NM.

                  (c) VIDEO owns, directly or indirectly, all of the outstanding
shares of or other interests in each of its subsidiaries, which subsidiaries are
listed in Section 5.2(c) of the VIDEO Disclosure Schedule. Each of the
outstanding shares of capital stock of each of VIDEO's subsidiaries has been
duly authorized, is validly paid and nonassessable, and is owned, directly or
indirectly, by VIDEO, free and clear of all liens, pledges, security interests,
claims or other encumbrances, except for such liens, pledges, security
interests, claims or encumbrances that would not have a Material Adverse Effect
on VIDEO. Schedule 5.2(c) of the VIDEO Disclosure Schedule sets forth the
following information for each of VIDEO's subsidiaries, if applicable: (i) name
and jurisdiction of incorporation or organization; (ii) authorized capital stock
or share capital; and (iii) number of issued and outstanding shares of capital
stock or share capital.

                  (d) Except as set forth in Section 5.2(d) of the VIDEO
Disclosure Schedule, VIDEO does not own, directly or indirectly, any interest or
investment (whether equity or debt) in any corporation, partnership, joint
venture, business, trust or entity (other than investments in short-term
investment securities).

                  (e) Except as provided in the VIDEO SEC Documents or in
Section 5.2(e) of the VIDEO Disclosure Schedule, there are no voting trusts or
shareholder agreements to which VIDEO is a party with respect to the voting of
the capital stock of VIDEO.

                  (f) The authorized capital stock of SENTRY consists of
100,000,000 shares of SENTRY Common Stock and 25,000,000 shares of preferred
stock, par value $0.001 per share (the "SENTRY PREFERRED STOCK"). As of the date
of this Agreement, (i) one (1) share of SENTRY Common Stock is issued and
outstanding and no shares of SENTRY Common Stock are held in treasury, (ii) no
shares of SENTRY Common Stock are reserved for issuance pursuant to outstanding
Stock Options and no shares of SENTRY Common Stock are reserved for issuance in
respect of future grants of Stock Options and (iii) no shares of SENTRY
Preferred Stock are issued and outstanding. All outstanding shares of SENTRY
Common Stock are validly issued, fully paid and nonassessable and are not
subject to preemptive rights. There are no outstanding subscriptions, options,
warrants, calls, rights, commitments or any other agreements, other than this
Agreement, to which SENTRY is a party or by which SENTRY is bound which obligate
SENTRY to (i) issue, deliver or sell or cause to be issued, delivered or sold
any additional capital stock of SENTRY or any other securities convertible into,
or exercisable or exchangeable for, or evidencing the right to subscribe for,
any such shares of SENTRY Common Stock or (ii) purchase, redeem or otherwise
acquire any capital stock of SENTRY. All of the shares of
SENTRY Common Stock and SENTRY Class A Preferred Stock to be issued to holders
of KNOGO Shares and VIDEO Shares have been duly authorized for issuance and,
when issued in accordance with the VIDEO Merger and the KNOGO Merger and this
Agreement, will be validly issued, fully paid and nonassessable, and will not be
subject to and will not be issued in violation of any preemptive rights.

                  (g) The authorized capital stock of VMC consists of 100 shares
of VMC Common Stock. As of the date of this Agreement, (i) one share of VMC
Common Stock is issued and outstanding and no shares of VMC Common Stock are
held in treasury, and (ii) no shares of VMC Common Stock are reserved for
issuance pursuant to outstanding stock options and no shares of VMC Common Stock
are reserved for issuance in respect of future grants of stock options. All
outstanding shares of VMC Common Stock are validly issued, fully paid and
nonassessable and are not subject to preemptive rights. There are no outstanding
subscriptions, options, warrants, calls, rights, commitments or any other
agreements to which VMC is a party or by which VMC is bound which obligate VMC
to (i) issue, deliver or sell or cause to be issued, delivered or sold any
additional shares of VMC Common Stock or any other capital stock of VMC or any
other securities convertible into, or exercisable or exchangeable for, or
evidencing the right to subscribe for, any such shares of VMC Common Stock or
(ii) purchase, redeem or otherwise acquire any shares of VMC Common Stock and
any other capital stock of VMC.

                  (h) The authorized capital stock of SMC consists of 100 shares
of SMC Common Stock. As of the date of this Agreement, (i) one share of SMC
Common Stock is issued and outstanding and no shares of SMC Common Stock are
held in treasury, and (ii) no shares of SMC Common Stock are reserved for
issuance pursuant to outstanding stock options and no shares of SMC Common Stock
are reserved for issuance in respect of future grants of stock options. All
outstanding shares of SMC Common Stock are validly issued, fully paid and
nonassessable and are not subject to preemptive rights. There are no outstanding
subscriptions, options, warrants, calls, rights, commitments or any other
agreements to which SMC is a party or by which SMC is bound which obligate SMC
to (i) issue, deliver or sell or cause to be issued, delivered or sold any
additional shares of SMC Common Stock or any other capital stock of SMC or any
other securities convertible into, or exercisable or exchangeable for, or
evidencing the right to subscribe for, any such shares of SMC Common Stock or
(ii) purchase, redeem or otherwise acquire any shares of SMC Common Stock and
any other capital stock of SMC.

     5.3 AUTHORIZATION AND VALIDITY OF AGREEMENT. Each of VIDEO, SENTRY, VMC and
SMC has the requisite corporate power and authority to execute and deliver this
Agreement and to consummate the transactions contemplated hereby in accordance
with the terms hereof (subject to the approval and adoption of this Agreement,
the VIDEO Merger and the KNOGO Merger by the holders of a majority of the
outstanding VIDEO Shares, SENTRY Common Stock, VMC Common Stock and SMC Common
Stock, as applicable, and the filing and recordation of appropriate merger
documents as required by the DGCL and the Minnesota Act). The Boards of
Directors of VIDEO (the "VIDEO BOARD"), SENTRY, VMC and SMC, respectively, and
VIDEO, as the sole stockholder of SENTRY, and SENTRY, as the sole stockholder of
VMC and SMC, have duly authorized the execution, delivery and performance of
this Agreement by each of VIDEO, SENTRY, VMC and SMC, and no other corporate
proceedings on the part of either VIDEO, SENTRY, VMC or SMC are necessary to
authorize this Agreement or the transactions contemplated hereby (other than the
approval and adoption of this Agreement, the VIDEO Merger and the KNOGO Merger
by the holders of a majority of the outstanding VIDEO Shares). This Agreement
has been duly executed and delivered by each of VIDEO, SENTRY, VMC and SMC and,
assuming this Agreement constitutes the legal, valid and binding obligation of
KNOGO, constitutes the legal, valid and binding obligation of each of VIDEO,
SENTRY, VMC and SMC, enforceable against each of VIDEO, SENTRY, VMC and SMC in
accordance with its terms, except as may be limited by any bankruptcy,
insolvency, reorganization, moratorium, fraudulent conveyance or other similar
laws affecting the enforcement of creditors' rights generally or by general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law).

     5.4 CONSENTS AND APPROVALS. (a) Neither the execution and delivery of this
Agreement by VIDEO, SENTRY, VMC and SMC nor the consummation by VIDEO, SENTRY,
VMC and SMC of the transactions contemplated hereby will require on the part of
VIDEO, SENTRY, VMC or SMC any consent, approval, authorization or permit of, or
filing with or notification to, any governmental or regulatory authority, except
(i) as may be required in connection with the applicable requirements of the HSR
Act, (ii) pursuant to the applicable requirements of the Securities Act, the
Exchange Act, and the rules and regulations promulgated thereunder, the
NASDAQ/NM on which VIDEO Shares are listed, and state securities or "blue sky"
laws and state takeover laws, (iii) the filing and recordation of the
Certificate of Merger, the Articles of Merger and other merger documents
pursuant to the DGCL and the Minnesota Act, (iv) as set forth in Section 5.4 of
the VIDEO Disclosure Schedule or (v) where the failure to obtain such consent,
approval, authorization or permit, or to make such filing or notification, would
not have a Material Adverse Effect on VIDEO, SENTRY, VMC or SMC or prevent the
consummation of the transactions contemplated hereby. The affirmative vote of
the holders of a majority of the outstanding VIDEO Shares is the only vote of
the holders of capital stock of VIDEO necessary to approve the VIDEO Merger.

                  (b)      The VIDEO Board has approved the execution of the
Support/Voting Agreements to be entered into between VIDEO and
certain KNOGO stockholders.

     5.5 NO VIOLATION. Except as set forth in Section 5.5 of the VIDEO
Disclosure Schedule, assuming the VIDEO Merger has been duly approved by the
holders of a majority of the outstanding VIDEO Shares, neither the execution and
delivery of this Agreement by VIDEO, SENTRY, VMC or SMC nor the consummation by
VIDEO, SENTRY, VMC and SMC of the transactions contemplated hereby will (a)
conflict with or violate the Articles of Incorporation or By-Laws of VIDEO, the
SENTRY Certificate of Incorporation, the SENTRY Bylaws, the VMC Certificate of
Incorporation, the VMC Bylaws, the SMC Certificate of Incorporation, or the SMC
Bylaws, (b) result in a violation or breach of, constitute a default (with or
without notice or lapse of time, or both) under, give rise to any right of
termination, cancellation or acceleration of, or result in the imposition of any
lien, charge or other encumbrance on any assets or property of either of VIDEO,
SENTRY, VMC or SMC pursuant to, any note, bond, mortgage, indenture, contract,
agreement, lease, license or other instrument or obligation to which either of
VIDEO, SENTRY, VMC or SMC is a party or by which either of VIDEO, SENTRY, VMC or
SMC or any of their respective assets or properties are bound, except for such
violations, breaches and defaults (or rights of termination, cancellation or
acceleration or lien or other charge or encumbrance) as to which requisite
waivers or consents have been obtained or which would not have a Material
Adverse Effect on either of VIDEO, SENTRY, VMC or SMC or prevent the
consummation of the transactions contemplated hereby or (c) assuming the
consents, approvals, authorizations or permits and filings or notifications
referred to in Section 5.4 and this Section 5.5 are duly and timely obtained or
made, and the approval of the VIDEO Merger by the holders of a majority of the
outstanding VIDEO Shares has been obtained, violate any order, writ, injunction,
decree, statute, rule or regulation applicable to either of VIDEO, SENTRY, VMC
or SMC or any of their respective assets or properties, except for such
violations which would not in the aggregate have a Material Adverse Effect on
either of VIDEO, SENTRY, VMC or SMC, or prevent the consummation of the
transactions contemplated hereby.

     5.6 SEC REPORTS; FINANCIAL STATEMENTS. (a) Since September 30, 1994, VIDEO
has filed with the SEC all forms, reports, schedules, statements and other
documents required to be filed by it with the SEC pursuant to the Exchange Act,
the Securities Act and the SEC's rules and regulations thereunder (collectively,
the "VIDEO SEC DOCUMENTS"). The VIDEO SEC Documents, including, without
limitation, any financial statements or schedules included therein, at the time
filed, or in the case of registration statements on their respective effective
dates, (i) complied as to form in all material respects with the applicable
requirements of the Exchange Act and the Securities Act, as the case may be, and
the applicable rules and regulations of the SEC thereunder and (ii) did not at
the time filed (or, in the case of registration statements, at the time of
effectiveness), contain any untrue statement of a material fact or omit to state
a material fact required to be stated therein or necessary in order to make the
statements made therein, in light of the circumstances under which they were
made, not misleading.

                  (b) Each of the consolidated financial statements of VIDEO
(including any related notes thereto) included in the VIDEO SEC Documents
(excluding the VIDEO SEC Documents described in Section 5.7 hereof) comply as to
form in all material respects with applicable accounting requirements and with
the published rules and regulations of the SEC with respect thereto, have been
prepared in accordance with generally accepted accounting principles applied on
a consistent basis during the period involved (except as may be indicated in
such financial statements or in the notes thereto or, in the case of unaudited
financial statements, as permitted by the requirements of Form 10-Q) and fairly
present in all material respects (subject, in the case of the unaudited
statements, to normal year-end adjustments and the absence of footnotes) the
financial position of VIDEO as of the dates thereof and the results of the
VIDEO's operations and cash flows for the periods presented therein.

     5.7 JOINT PROXY STATEMENT/PROSPECTUS. None of the information supplied by
VIDEO, SENTRY, VMC or SMC to be included in the Joint Proxy Statement/Prospectus
or the Registration Statement will, in the case of the Joint Proxy
Statement/Prospectus or any amendments thereof or supplements thereto, at the
time of the mailing of the Joint Proxy Statement/Prospectus or any amendments
thereof or supplements thereto, and at the time of the VIDEO Stockholders'
Meeting, or, in the case of the Registration Statement, at the time it becomes
effective and at the Effective Time, contain any untrue statement of a material
fact or omit to state a material fact required to be stated therein or necessary
in order to make the statements therein, in light of the circumstances under
which they were made, not misleading. The Joint Proxy Statement/Prospectus will
comply as to form in all material respects with the provisions of the Securities
Act and the Exchange Act. Notwithstanding the foregoing, neither VIDEO, SENTRY,
VMC nor SMC makes any representation or warranty with respect to the statements
made in the Joint Proxy Statement/Prospectus based on information supplied by or
on behalf of KNOGO or any of its affiliates specifically for inclusion therein.

     5.8 COMPLIANCE WITH LAW. Except as set forth in the VIDEO SEC Documents or
in Section 5.8 of the VIDEO Disclosure Schedule, VIDEO is not in violation of
any applicable statute, rule, regulation, decree or order of any governmental or
regulatory authority applicable to VIDEO, except for violations which would not
have a Material Adverse Effect on VIDEO. Without limiting the foregoing, except
for matters which would not have a Material Adverse Effect on VIDEO and those
matters disclosed in the VIDEO SEC Documents or in Section 5.8 of the VIDEO
Disclosure Schedule, to the Knowledge of VIDEO, (a) the business of VIDEO is
being conducted in compliance with applicable Environmental Laws, (b) the
business of VIDEO has not made, caused or contributed to any material release of
any hazardous or toxic waste or substance into the environment and (c) VIDEO is
not subject to any compliance agreement or settlement agreement from an alleged
violation of Environmental Laws. Except as set forth in the VIDEO SEC Documents
or in Section 5.8 of the VIDEO Disclosure Schedule or as contemplated or
permitted by this Agreement, VIDEO holds all permits, licenses, exemptions,
orders and approvals of governmental and regulatory authorities necessary for
the conduct of its businesses, as now being conducted, except where the failure
to hold permits, licenses, exemptions, orders and approvals would not have a
Material Adverse Effect on VIDEO.

     5.9 ABSENCE OF CERTAIN CHANGES. Except as disclosed in the VIDEO SEC
Documents or in Section 5.9 of the VIDEO Disclosure Schedule, since June 30,
1996 through the date of this Agreement, VIDEO has conducted its business only
in the ordinary course and there has not been (a) any changes which could have a
Material Adverse Effect on VIDEO; (b) any declaration, setting aside or payment
of any dividend or payment in cash, stock or property or other distribution with
respect to VIDEO's capital stock; (c) any reclassification, combination, split,
subdivision, redemption, purchase or other acquisition, directly or indirectly,
of any of VIDEO's capital stock; (d) any material change in VIDEO's accounting
principles, practices or methods; or (e) any material alteration in the
character or conduct of VIDEO's business from that conducted and contemplated
as of June 30, 1996.

     5.10 NO UNDISCLOSED LIABILITIES. Except (a) for liabilities incurred in the
ordinary course of business, (b) liabilities incurred in connection with the
transactions contemplated by this Agreement, (c) liabilities which would not
have a Material Adverse Effect on VIDEO, SENTRY, VMC or SMC and (d) as disclosed
in the VIDEO SEC Documents or as set forth in Section 5.10 of the VIDEO
Disclosure Schedule, from June 30, 1996 until the date of this Agreement, VIDEO,
SENTRY, VMC and SMC had not incurred any material liabilities that would be
required to be reflected in or reserved against a consolidated balance sheet of
VIDEO prepared in accordance with generally accepted accounting principles.

     5.11 LITIGATION. Except as disclosed in the VIDEO SEC Documents or in
Section 5.11 of the VIDEO Disclosure Schedule, there are no claims, actions,
proceedings or governmental investigations pending, nor has VIDEO, SENTRY, VMC
or SMC received notice of any threatened, claims, actions, proceedings or
governmental investigations against VIDEO, SENTRY, VMC or SMC by or before any
court or other governmental or regulatory body, which, if adversely determined,
would have a Material Adverse Effect on VIDEO, SENTRY, VMC or SMC. Neither
VIDEO, SENTRY, VMC or SMC nor their respective assets is subject to any
outstanding and unsatisfied order, writ, judgment, injunction or decree which
would have a Material Adverse Effect on VIDEO, SENTRY, VMC or SMC.

     5.12 EMPLOYEE BENEFIT MATTERS. All employee benefit plans and other benefit
arrangements covering employees of VIDEO (the "VIDEO BENEFIT PLANS") are listed
in Section 5.12 of the VIDEO Disclosure Schedule, except such benefit plans and
other benefit arrangements which are not material. True and complete copies of
the VIDEO Benefit Plans have been made available to KNOGO. To the extent
applicable, the VIDEO Benefit Plans comply in all material respects with the
requirements of ERISA, the Code, and any VIDEO Benefit Plan intended to be
qualified under Section 401(a) of the Code has been determined by the IRS to be
so qualified. No VIDEO Benefit Plan is covered by Title IV of ERISA or Section
412 of the Code. VIDEO has not incurred any liability or penalty under Section
4975 of the Code or Section 502(i) of ERISA with respect to any VIDEO Benefit
Plan, except as would not have a Material Adverse Effect on VIDEO. Each VIDEO
Benefit Plan has been maintained and administered in all material respects in
compliance with its terms and with ERISA and the Code to the extent applicable
thereto. To the Knowledge of VIDEO, there are no pending, nor has VIDEO received
notice of any threatened, claims against or otherwise involving any of the VIDEO
Benefit Plans, except as would not have a Material Adverse Effect on VIDEO. All
material contributions required to be made as of the date this Agreement to the
VIDEO Benefit Plans have been made or provided for. Neither VIDEO nor any entity
under "common control" with VIDEO within the meaning of Section 4001 of ERISA
has contributed to, or been required to contribute to, any "multi-employer plan"
(as defined in Sections 3(37) and 4001(a)(3) of ERISA).

     5.13 TAXES. Except as disclosed in the VIDEO SEC Documents or in Section
5.13 of the VIDEO Disclosure Schedule, VIDEO and each of its subsidiaries (a)
have filed all federal, state and foreign tax returns required to be filed by
VIDEO or any of its subsidiaries for tax years ended prior to the date of this
Agreement, except for those tax returns the failure of which to file would not
have a Material Adverse Effect on VIDEO or for which requests for extensions
have been timely filed, and all such returns are complete in all material
respects, (b) have paid or accrued all taxes shown to be due and payable on such
returns, (c) have accrued all such taxes for such periods subsequent to the
periods covered by such returns ending on or prior to the date hereof and (d)
have "open" years for federal income tax returns only as set forth in the VIDEO
SEC Documents or in Section 5.13 of the VIDEO Disclosure Schedule. There are no
liens for taxes on the assets of VIDEO or any of its subsidiaries, except for
liens that would not have a Material Adverse Effect on VIDEO, and there is no
pending, nor has VIDEO or any of its subsidiaries received notice of any
threatened, tax audit, examination, refund litigation or adjustment in
controversy which, if determined adversely, would have a Material Adverse Effect
on VIDEO. Neither VIDEO nor any of its subsidiaries is a party to any agreement
providing for the allocation or sharing of taxes.

     5.14 INTELLECTUAL PROPERTY. To the Knowledge of VIDEO, VIDEO owns or
possesses rights in all patents, trademarks, tradenames, copyrights and other
intellectual property rights used in or necessary for the conduct of VIDEO's
business as now operated (collectively, "VIDEO INTELLECTUAL PROPERTY"), except
where the failure to own or possess any such VIDEO Intellectual Property would
not have a Material Adverse Effect on VIDEO. VIDEO has not received any notice
that VIDEO's products or its use thereof violate, infringe or otherwise conflict
with the intellectual property of third parties, except for such violations,
infringements or conflicts that would not have a Material Adverse Effect on
VIDEO or as disclosed in the VIDEO SEC Documents or in Section 5.14 of the VIDEO
Disclosure Schedule.

     5.15 LABOR MATTERS. VIDEO is not a party to, or bound by, any collective
bargaining agreement, contract or other agreement or understanding with a labor
union or labor union organization. There is no unfair labor practice or labor
arbitration proceeding pending or, to the Knowledge of VIDEO, threatened against
VIDEO relating to its business, except for any such proceeding that would not
have a Material Adverse Effect on VIDEO.

     5.16 BROKERS AND FINDERS. No broker, finder or investment bank has acted
directly or indirectly for either of VIDEO, SENTRY, VMC or SMC, nor has either
of VIDEO, SENTRY, VMC or SMC incurred any obligation to pay any brokerage,
finder's or other fee or commission in connection with the transactions
contemplated hereby, other than Alex. Brown & Sons Incorporated ("ALEX BROWN"),
the fees and expenses of which shall be borne by VIDEO.

     5.17 OPINION OF FINANCIAL ADVISOR. Alex Brown, VIDEO's financial advisor,
has delivered its opinion, dated the date of this Agreement, to the VIDEO Board
to the effect that, as of such date, the VIDEO Merger Consideration is fair,
from a financial point of view, to the holders of VIDEO Shares.

     5.18 SECTION 351/REORGANIZATION TREATMENT. Neither VIDEO nor any VIDEO
subsidiary has taken or failed to take any action or has any knowledge of any
fact or circumstance that is reasonably likely to (i) prevent the VIDEO Merger
from qualifying as at least one of (A) a reorganization described in Section
368(a) of the Code or (B) an exchange governed by Section 351 of the Code, or
(ii) prevent the KNOGO Merger from qualifying as an exchange governed by Section
351 of the Code.

     5.19 KNOGO SHARES OWNERSHIP. Except as disclosed in Section 5.19 of the
VIDEO Disclosure Schedule, neither VIDEO nor any of its affiliates or
subsidiaries owns any KNOGO Shares or other securities or rights convertible,
exchangeable or otherwise exercisable into KNOGO Shares.

     5.20 OPERATIONS OF SENTRY, VMC AND SMC. SENTRY, VMC and SMC have been
formed solely for the purpose of engaging in the transactions contemplated
hereby and prior to the Effective Time will have engaged in no other business
activities.


                                   ARTICLE VI

                                    COVENANTS

     6.1 CONDUCT OF THE BUSINESS OF KNOGO AND VIDEO PENDING THE REORGANIZATION.
From the date hereof until the Effective Time, each of KNOGO and VIDEO shall use
commercially reasonable efforts to conduct its business in all material respects
only in the ordinary course consistent with past practice, and to preserve
intact its business organization and keep available the services of its present
key officers and employees (PROVIDED, that to satisfy the foregoing obligation,
KNOGO and VIDEO shall not be required to make any payments or enter into or
amend any contractual arrangements or understandings, except in the ordinary
course of business consistent with past practice) and, except as otherwise
required by applicable law or as set forth in Section 6.1 of the KNOGO
Disclosure Schedule or the VIDEO Disclosure Schedule, as the case may be,
neither KNOGO nor VIDEO shall, without the prior written consent of the other
party (which consent shall not be unreasonably withheld):

                  (a)      amend its Articles or Certificate of
         Incorporation, as amended, as the case may be, or By-Laws;

                  (b) declare, set aside or pay any dividend or other
         distribution or payment in cash, stock or property in respect of its
         capital stock, or reclassify, combine, split, subdivide or redeem,
         purchase or otherwise acquire, directly or indirectly, any of its
         capital stock;

                  (c) issue, grant, sell or pledge or agree to or authorize the
         issuance, grant, sale or pledge of any shares of, or rights of any kind
         to acquire any shares of, its capital stock other than KNOGO Shares or
         VIDEO Shares issuable upon the exercise of Stock Options and Warrants;

                  (d)      in the case of VIDEO, sell, assign or otherwise
         transfer the shares of SENTRY Common Stock held by VIDEO;

                  (e)      acquire, sell, transfer, lease or encumber any
         material assets except in the ordinary course of business;

                  (f)      adopt a plan of complete or partial liquidation
         or adopt resolutions providing for the complete or partial
         liquidation, dissolution, consolidation, merger,
         restructuring or recapitalization;

                  (g)      grant any severance or termination pay to, or
         enter into any employment agreement with, any of its
         executive officers or directors, other than in the ordinary
         course of business;

                  (h) except in the ordinary course of business, increase the
         compensation payable or to become payable to its executive officers or
         employees, enter into any contract or other binding commitment in
         respect of any such increase (other than pursuant to a KNOGO Benefit
         Plan or VIDEO Benefit Plan, as the case may be, or policy or agreement
         existing as of the date hereof) to, or enter into any severance
         agreement with any of its directors, executive officers or other
         employees, or establish, adopt, enter into, make any new grants or
         awards under or amend, any KNOGO Benefit Plan or VIDEO Benefit Plan, as
         the case may be, except as required by applicable law, including any
         obligation to engage in good faith collective bargaining, to maintain
         tax-qualified status or as may be required by any KNOGO Benefit Plan or
         VIDEO Benefit Plan as of the date hereof;

                  (i) settle or compromise any material claims or litigation or,
         except in the ordinary course of business, modify, amend or terminate
         any of its material contracts or waive, release or assign any material
         rights or claims, or make any payment, direct or indirect, of any
         material liability before the same becomes due and payable in
         accordance with its terms;

                  (j) take any action, other than in the ordinary course of
         business, with respect to accounting policies or procedures (including
         tax accounting policies and procedures), except as may be required by
         law or generally accepted accounting principles;

                  (k) make any material tax election or permit any material
         insurance policy naming it as a beneficiary or a loss payable payee to
         be canceled or terminated, except in the ordinary course of business;
         and

                  (l)      authorize or enter into an agreement to do any of
         the foregoing.

     6.2 ACCESS; CONFIDENTIALITY. (a) From the date of this Agreement until the
Effective Time, upon reasonable prior notice to VIDEO or KNOGO, as the case may
be, VIDEO and KNOGO shall give one another and their respective authorized
representatives reasonable access during normal business hours to their
respective executive officers, properties, books and records, and shall furnish
one another and their respective authorized representatives with such financial
and operating data and other information concerning the businesses and
properties of VIDEO and KNOGO as VIDEO and KNOGO may from time to time
reasonably request.

                  (b) Each of VIDEO, SENTRY, VMC, SMC and KNOGO will hold and
treat, and will cause their respective affiliates, agents and other
representatives to hold and treat, all documents and information concerning
VIDEO, SENTRY, VMC, SMC or KNOGO, as the case may be, furnished to one another
or their respective representatives in connection with the transactions
contemplated by this Agreement confidential in accordance with the
Confidentiality Agreements dated July 11, 1996 and September 6, 1996, between
KNOGO and VIDEO, which Confidentiality Agreements shall remain in full force and
effect until termination in accordance with their terms.

     6.3 MEETINGS OF STOCKHOLDERS. Each of VIDEO and KNOGO will take all action
necessary in accordance with applicable law and the Certificates or Articles of
Incorporation, as the case may be, and By-Laws of VIDEO and KNOGO to convene a
meeting of its stockholders as promptly as practicable to consider and vote upon
the approval of this Agreement and the transactions contemplated hereby. The
Board of Directors of each of VIDEO and KNOGO shall recommend such approval and
VIDEO and KNOGO shall each take all lawful action to solicit such approval,
including, without limitation, timely mailing of the Joint Proxy
Statement/Prospectus; PROVIDED, that such recommendation or solicitation is
subject to any action (including any withdrawal or change of its recommendation)
taken by, or upon authority of, the KNOGO Board or the VIDEO Board in the
exercise of its good faith judgment as to its fiduciary duties to its
stockholders imposed by law. VIDEO, as sole stockholder of SENTRY, and SENTRY,
as sole stockholder of VMC and SMC, shall as promptly as practicable duly
approve this Agreement and the transactions contemplated hereby.

     6.4 REASONABLE EFFORTS. Subject to the terms and conditions of this
Agreement and applicable law, each of the parties shall act in good faith and
use commercially reasonable efforts to take, or cause to be taken, all actions,
and to do, or cause to be done, all things necessary, proper or advisable to
consummate and make effective the transactions contemplated by this Agreement as
soon as practicable, including such actions or things as any other party may
reasonably request in order to cause any of the conditions to such other party's
obligation to consummate the transactions contemplated by this Agreement to be
fully satisfied. Without limiting the foregoing, the parties shall (and shall
cause their respective subsidiaries, and use commercially reasonable efforts to
cause their respective affiliates, directors, officers, employees, agents,
attorneys, accountants and representatives, to) consult and fully cooperate with
and provide assistance to each other in (a) the preparation and filing with the
SEC of the Joint Proxy Statement/Prospectus, and any necessary amendments or
supplements thereto; (b) seeking to have the Joint Proxy Statement/Prospectus
cleared by the SEC as soon as reasonably practicable after filing; (c) obtaining
all necessary consents, approvals, waivers, licenses, permits, authorizations,
registrations, qualifications, or other permission or action by, and giving all
necessary notices to and making all necessary filings with and applications and
submissions to, any court, administrative agency or commission or other
governmental authority or instrumentality, domestic or foreign (collectively,
"GOVERNMENTAL ENTITY"), or other person or entity as soon as reasonably
practicable after filing; (d) seeking early termination of any waiting period
under the HSR Act; (e) providing all such information concerning such party, its
subsidiaries and its officers, directors, partners and affiliates and making all
applications and filings as may be necessary or reasonably requested in
connection with any of the foregoing; (f) in general, consummating and making
effective the transactions contemplated hereby; and (g) in the event and to the
extent required, amending this Agreement so that this Agreement, the KNOGO
Merger and the VIDEO Merger comply with the DGCL and the Minnesota Act. Prior to
making any application to or filing with any Governmental Entity or other person
or entity in connection with this Agreement (other than filing under the HSR
Act), each party shall provide the other party with drafts thereof and afford
the other party a reasonable opportunity to comment on such drafts.

     6.5 PUBLIC ANNOUNCEMENTS. KNOGO, VIDEO, SENTRY, VMC and SMC will consult
with one another prior to issuing any release or otherwise making any public
statements with respect to the transactions contemplated hereby and shall not
issue any such press release or make any public statement prior to such
consultation, except as may be required by applicable law or any listing
agreement with a national securities exchange by which such party is bound.

     6.6 ACQUISITION PROPOSALS. Except as contemplated hereby, each of KNOGO and
VIDEO agree not to (and shall use reasonable efforts to cause its officers,
directors and employees and any investment banker, attorney, accountant, or
other agent retained by it not to) solicit, directly or indirectly, any proposal
or offer to acquire all or any significant part of its business and properties
or its capital stock, whether by merger, purchase of assets, tender offer or
otherwise (an "ACQUISITION PROPOSAL" and, any such transaction, an "ACQUISITION
TRANSACTION) or provide any non-public information concerning the respective
company to any third party in connection with an Acquisition Proposal.
Notwithstanding the foregoing, KNOGO and VIDEO may furnish information or cause
information to be furnished to, and may participate in discussions and
negotiations directly or through their respective representatives and enter into
an agreement relating to an Acquisition Proposal with, any third party
(including parties with whom KNOGO and VIDEO or their respective representatives
have had discussions on any basis on or prior to the date hereof) who makes an
unsolicited proposal or offer to it, if the KNOGO Board or VIDEO Board, as the
case may be, determines in good faith, after consultation with outside counsel,
that the failure to consider such proposal or offer could reasonably be deemed
to cause its directors to breach their fiduciary duties under applicable law. In
addition, nothing contained in this Agreement shall prohibit KNOGO or VIDEO and
their respective directors from (a) issuing a press release or otherwise
publicly disclosing the terms of any Acquisition Proposal, (b) taking and
disclosing to its stockholders any position, and making related filings with the
SEC, as required by Rules 14e-2 and 14d-9 under the Exchange Act with respect to
any tender offer or (c) taking any action and making any disclosure to its
stockholders which the KNOGO Board or VIDEO Board, as the case may be,
determines in good faith, after consultation with outside counsel, would likely
be required to be taken or made under applicable law (including, without
limitation, laws relating to the fiduciary duties of directors). In the event
KNOGO or VIDEO receives an Acquisition Proposal, it shall promptly inform the
other party as to the receipt of such Acquisition Proposal, unless the KNOGO
Board or VIDEO Board, as the case may be, determines, after consultation with
outside counsel, that giving such notice could reasonably be deemed to cause its
directors to breach their fiduciary duties under applicable law.

     6.7 REGISTRATION STATEMENT AND JOINT PROXY STATEMENT/PROSPECTUS. KNOGO and
VIDEO shall promptly furnish all information as may be required for inclusion in
the Registration Statement on Form S-4 to be filed with the SEC in connection
with the issuance of shares of SENTRY Common Stock in the Reorganization (the
"REGISTRATION STATEMENT") and the joint proxy statement/prospectus which will
form a part thereof (the "JOINT PROXY STATEMENT/PROSPECTUS"). VIDEO and KNOGO
shall cooperate and promptly prepare and VIDEO shall file with the SEC as soon
as practicable the Registration Statement under the Securities Act. VIDEO shall
use reasonable efforts, and KNOGO will cooperate with VIDEO, to have the
Registration Statement declared effective by the SEC as promptly as practicable.
VIDEO shall use reasonable efforts to obtain, prior to the effective date of the
Registration Statement, all necessary state securities law or "blue sky" permits
or approvals required to consummate the transactions contemplated by this
Agreement. If at any time prior to the Effective Time, any information
pertaining to KNOGO or VIDEO contained in or omitted from the Registration
Statement makes such information false or misleading, KNOGO and VIDEO shall
promptly inform the other party and provide such other party with information
necessary to make the statements contained therein not misleading. No amendment
or supplement to the Joint Proxy Statement/Prospectus will be made by VIDEO or
KNOGO without the approval of the other party.

     6.8 LISTING APPLICATION. VIDEO shall promptly prepare and submit to NASDAQ,
or another nationally recognized exchange, a listing application covering the
shares of SENTRY Common Stock issuable in the Reorganization, and shall use its
best efforts to obtain, prior to the Effective Time, approval for the listing of
such SENTRY Common Stock, subject to official notice of issuance.

     6.9 AFFILIATE LETTERS. (a) At least 30 days prior to the Closing Date,
KNOGO shall deliver to VIDEO a list of names and addresses of those persons who
were, in KNOGO's reasonable judgment, at the record date for the KNOGO
Stockholders' Meeting, "affiliates" of KNOGO (each such person, a "KNOGO
AFFILIATE") within the meaning of Rule 145 of the rules and regulations
promulgated under the Securities Act. KNOGO shall provide VIDEO with such
information and documents as VIDEO shall reasonably request for purposes of
reviewing such list. KNOGO shall use reasonable efforts to deliver or cause to
be delivered to VIDEO, prior to the Closing Date, from each of the KNOGO
Affiliates identified in the foregoing list, an Affiliate Letter in the form
attached hereto as EXHIBIT C. SENTRY shall be entitled to place legends as
specified in such Affiliate Letters on the certificates evidencing any SENTRY
Common Stock to be received by such KNOGO Affiliates pursuant to the terms of
this Agreement, and to issue appropriate stop transfer instructions to the
transfer agent for the SENTRY Common Stock, consistent with the terms of such
Affiliate Letters.

                  (b)      At least 30 days prior to the Closing Date, VIDEO
shall deliver to KNOGO a list of names and addresses of those persons who were,
in VIDEO's reasonable judgment, at the record date for VIDEO Stockholders'
Meeting, "affiliates" of VIDEO (each such person, a "VIDEO AFFILIATE") within
the meaning of Rule 145 of the rules and regulations promulgated under the
Securities Act. VIDEO shall provide KNOGO with such information and documents as
KNOGO shall reasonably request for purposes of reviewing such list. VIDEO shall
use reasonable efforts to deliver or cause to be delivered to KNOGO, prior to
the Closing Date, from each of the VIDEO Affiliates identified in the foregoing
list, an Affiliate Letter in the form attached hereto as EXHIBIT C. SENTRY shall
be entitled to place legends as specified in such Affiliate Letters on the
certificates evidencing any SENTRY Common Stock to be received by such VIDEO
Affiliates pursuant to the terms of this Agreement, and to issue appropriate
stop transfer instructions to the transfer agent for the SENTRY Common Stock,
consistent with the terms of such Affiliate Letters.

     6.10 D&O INDEMNIFICATION AND INSURANCE. (a) From the Effective Time through
the later of (i) the sixth anniversary of the date on which the Effective Time
occurs and (ii) the expiration of any statute of limitations applicable to any
claim, action, suit, proceeding or investigation referred to below, SENTRY
shall, or shall cause the VIDEO Surviving Corporation and KNOGO Surviving
Corporation to, indemnify and hold harmless each present and former officer,
director, employee or agent of KNOGO and VIDEO, including, without limitation,
each person controlling any of the foregoing persons (the "INDEMNIFIED
PARTIES"), against all claims, losses, liabilities, damages, judgments, fines,
fees, costs or expenses, including, without limitation, attorneys' fees and
disbursements (collectively, "COSTS"), incurred in connection with any claim,
action, suit, proceeding or investigation, whether civil, criminal,
administrative or investigative, arising out of or pertaining to matters
existing or occurring at or prior to the Effective Time (including, without
limitation, this Agreement and the transactions and actions contemplated
hereby), whether asserted or claimed prior to, at or after the Effective Time,
to the fullest extent permitted under applicable law and the Certificate of
Incorporation, as amended, or By-Laws of KNOGO or indemnification agreements in
effect on the date hereof, including provisions relating to advancement of
expenses incurred in the defense of any claim, action, suit, proceeding or
investigation. Without limiting the foregoing, in the event that any claim,
action, suit, proceeding or investigation is brought against an Indemnified
Party (whether arising before or after the Effective Time), the Indemnified
Party may retain counsel satisfactory to such Indemnified Party, and SENTRY
shall, or shall cause the VIDEO Surviving Corporation and KNOGO Surviving
Corporation to, advance the fees and expenses of such counsel for the
Indemnified Party in accordance with the Certificate of Incorporation, as
amended, or By-Laws of KNOGO in effect on the date of this Agreement.

                  (b) SENTRY shall, or shall cause the VIDEO Surviving
Corporation and KNOGO Surviving Corporation, to keep in effect in its
Certificate of Incorporation and Bylaws, provisions of KNOGO providing for
exculpation of director and officer liability and its indemnification of the
Indemnified Parties to the fullest extent permitted under the DGCL, which
provisions shall not be amended except as required by applicable law or except
to make changes permitted by law that would enlarge the Indemnified Parties'
right to indemnification.

                  (c) SENTRY shall maintain, or shall cause the VIDEO Surviving
Corporation and KNOGO Surviving Corporation to maintain, with respect to matters
occurring at, prior to or subsequent to the Effective Time, at no expense to the
beneficiaries, directors' and officers', liability insurance ("D&O INSURANCE")
for the Indemnified Parties, issued by a carrier or carriers assigned a
claims-paying ability rating by A.M. Best & Co. of "A (Excellent)" or higher,
providing at least the same coverage as the D&O Insurance currently maintained
by KNOGO and containing terms and conditions which are no less favorable to the
beneficiaries, for a period of at least six years from the Effective Time. In
the event any claim is made against present or former directors, officers or
employees of KNOGO or VIDEO that is covered or potentially covered by insurance,
neither SENTRY, the VIDEO Surviving Corporation nor the KNOGO Surviving
Corporation shall do anything that would forfeit, jeopardize, restrict or limit
the insurance coverage available for that claim until the final disposition
thereof.

                  (d) Notwithstanding anything herein to the contrary, if any
claim, action, suit, proceeding or investigation (whether arising before, at or
after the Effective Time) is made against any Indemnified Party, on or prior to
the sixth anniversary of the Effective Time, the provisions of this Section 6.10
shall continue in effect until the final disposition of such claim, action,
suit, proceeding or investigation.

                  (e) This covenant is intended to be for the benefit of, and
shall be enforceable by, each of the Indemnified Parties and their respective
heirs and legal representatives. The indemnification provided for herein shall
not be deemed exclusive of any other rights to which an Indemnified Party is
entitled, whether pursuant to law, contract or otherwise. SENTRY shall pay all
expenses, including attorneys' fees, that may be incurred by any Indemnified
Party in enforcing the indemnity and other obligations provided for in this
Section 6.10.

                  (f) In the event that SENTRY or the VIDEO Surviving
Corporation or the KNOGO Surviving Corporation or any of their respective
successor or assigns (i) consolidates with or merges into any other Person and
shall not be the continuing or surviving corporation or entity of such
consolidation or merger or (ii) transfers or conveys all or substantially all of
its properties and assets to any Person, then, and in each such case, to the
extent necessary to effectuate the purposes of this Section 6.10, proper
provision shall be made so that the successors and assigns of SENTRY or the
VIDEO Surviving Corporation or the KNOGO Surviving Corporation shall succeed to
the obligations set forth in this Section 6.10 and none of the actions described
in clauses (i) or (ii) shall be taken until such provision is made.

     6.11 EMPLOYEE BENEFITS. (a) From and after the Effective Time, SENTRY, the
VIDEO Surviving Corporation and the KNOGO Surviving Corporation and their
respective affiliates will honor in accordance with their terms all existing
employment, severance, consulting and salary continuation agreements (i) between
KNOGO and any of its current or former officers, directors, employees or
consultants, and (ii) between VIDEO and any of its current or former officers,
directors, employees or consultants.

                  (b) SENTRY agrees that, for a three (3) year period after the
Effective Time, SENTRY shall provide, or shall cause the VIDEO Surviving
Corporation and the KNOGO Surviving Corporation to provide, those persons who,
prior to the Effective Time, were employees of KNOGO ("KNOGO EMPLOYEES") or
VIDEO ("VIDEO EMPLOYEES") with employee plans and programs which provide
benefits that are no less favorable in the aggregate to those provided to other
employees of SENTRY of comparable status and seniority. With respect to such
benefits, past service, compensation and expense credits of such KNOGO Employees
and VIDEO Employees shall be recognized for all purposes under such plans
(including, but not limited to, participation, eligibility vesting and
calculation benefits), and each employee or fringe benefit plan or program
available to KNOGO Employees or VIDEO Employees as contemplated hereby shall be
applied to such KNOGO Employees and VIDEO Employees, respectively.

                  (c) In the event that SENTRY or the VIDEO Surviving
Corporation or the KNOGO Surviving Corporation or any of their respective
successors or assigns (i) consolidates with or merges into any other Person and
shall not be the continuing or surviving corporation or entity of such
consolidation or merger or (ii) transfers or conveys all or substantially all of
its properties and assets to any Person, then, and in each such case, to the
extent necessary to effectuate the purposes of this Section 6.11, proper
provision shall be made so that the successors and assigns of SENTRY or the
VIDEO Surviving Corporation and the VIDEO Surviving Corporation shall succeed to
the obligations set forth in this Section 6.11 and none of the actions described
in clauses (i) or (ii) shall be taken until such provision is made.

     6.12 FEES AND EXPENSES. (a) Whether or not the VIDEO Merger or the KNOGO
Merger is consummated, all costs and expenses incurred in connection with this
Agreement and the transactions contemplated hereby (including, without
limitation, fees and disbursements of counsel, financial advisors and
accountants) shall be borne by the party which incurs such cost or expense;
PROVIDED, that if this Agreement is terminated pursuant to Section 8.1 as a
result of the willful and material misrepresentation by a party or the willful
and material breach by a party of any of its covenants or arrangements set forth
herein, such party shall pay the costs and expenses incurred by the other party
in connection with this Agreement; and PROVIDED, FURTHER, that all costs and
expenses related to the preparation, printing, filing and mailing (as
applicable) of the Joint Proxy Statement/Prospectus and all SEC filing fees
incurred in connection with the Joint Proxy Statement/Prospectus shall be borne
equally by KNOGO, on the one hand, and VIDEO, on the other hand.

                  (b)(i)Notwithstanding the foregoing, provided that neither
VIDEO, SENTRY, VMC nor SMC shall be in breach of their respective obligations
under this Agreement, if (A) the KNOGO Board shall withdraw or modify in a
manner adverse to VIDEO its approval or recommendation of the KNOGO Merger or
shall have resolved to do any of the foregoing pursuant to Section 6.6 and (B)
VIDEO or KNOGO shall have terminated this Agreement pursuant to Section 8.1(g)
and (C) within six months of any such termination, KNOGO shall have consummated
an Acquisition Transaction, then KNOGO agrees that it will pay, or reimburse
VIDEO for, all reasonable fees and expenses incurred by VIDEO and its affiliates
in connection with the Reorganization and the consummation of the transactions
contemplated by this Agreement, in an amount not to exceed $750,000 in the
aggregate, in addition to the amount otherwise payable pursuant to the second
proviso contained in Section 6.12(a) above.

                     (ii)      Notwithstanding the foregoing, provided that
KNOGO shall not be in breach of its obligations under this Agreement, if (A) the
VIDEO Board shall withdraw or modify in a manner adverse to KNOGO its approval
or recommendation of the VIDEO Merger or shall have resolved to do any of the
foregoing pursuant to Section 6.6 and (B) KNOGO or VIDEO shall have terminated
this Agreement pursuant to Section 8.1(h) and (C) within six months of any such
termination, VIDEO shall have consummated an Acquisition Transaction, then VIDEO
agrees that it will pay, or reimburse KNOGO for, all reasonable fees and
expenses incurred by KNOGO and its affiliates in connection with the
Reorganization and the consummation of the transactions contemplated by this
Agreement, in an amount not to exceed $750,000 in the aggregate, in addition to
the amount otherwise payable pursuant to the second proviso contained in Section
6.12(a) above.

     6.13 CANCELLATION OF SENTRY COMMON STOCK. As of the Effective Time, all
authorized SENTRY Common Stock issued and outstanding immediately prior to the
Effective Time shall automatically be canceled and extinguished and shall cease
to exist.


                                   ARTICLE VII

                               CLOSING CONDITIONS

     7.1 CONDITIONS TO OBLIGATIONS OF EACH PARTY TO EFFECT THE REORGANIZATION.
The respective obligations of each party hereto to effect the VIDEO Merger or
the KNOGO Merger, respectively, shall be subject to the satisfaction at or prior
to the Effective Time of the following conditions, any or all of which may be
waived in accordance with Section 9.7 hereof, in whole or in part, to the extent
permitted by applicable law:

                  (a) STOCKHOLDER APPROVAL. This Agreement shall have been
         adopted, and the VIDEO Merger and KNOGO Merger shall have been approved
         in the manner required by applicable law or by the applicable
         regulations of any stock exchange or other regulatory body, as the case
         may be, by a majority vote of the holders of the outstanding VIDEO
         Shares and KNOGO Shares, respectively.

                  (b) NO INJUNCTION. No federal or state governmental or
         regulatory body or court of competent jurisdiction shall have enacted,
         issued, promulgated or enforced any statute, rule, regulation,
         executive order, decree, judgment, preliminary or permanent injunction
         or other order which is in effect and which prohibits, enjoins or
         otherwise restrains the consummation of the VIDEO Merger or the KNOGO
         Merger; PROVIDED, that the parties shall use commercially reasonable
         efforts to cause any such decree, judgment, injunction or order to be
         vacated or lifted.

                  (c)      HSR ACT.  Any waiting period under the HSR Act
         applicable to the Reorganization shall have terminated or
         otherwise expired.

                  (d) REGISTRATION STATEMENT. The Registration Statement shall
         have become effective and shall be effective at the Effective Time, and
         no stop order suspending effectiveness of the Registration Statement
         shall have been issued, no action, suit, proceeding or investigation by
         the SEC to suspend the effectiveness thereof shall have been initiated
         and be continuing, and all necessary approvals under state securities
         laws relating to the issuance or trading of the SENTRY Common Stock to
         be issued to VIDEO and KNOGO stockholders in connection with the
         Reorganization shall have been received.

                  (e) LISTING OF SENTRY COMMON STOCK. The SENTRY Common Stock to
         be issued to VIDEO and KNOGO stockholders in connection with the
         Reorganization shall have been approved for listing on NASDAQ, or
         another nationally recognized exchange, subject only to official notice
         of issuance.

     7.2 CONDITIONS PRECEDENT TO THE OBLIGATIONS OF KNOGO. The obligation of
KNOGO to effect the KNOGO Merger is also subject to the satisfaction at or prior
to the Effective Time of each of the following additional conditions, unless
waived by KNOGO:

                  (a)  ACCURACY OF REPRESENTATIONS AND WARRANTIES.  All
         representations and warranties made by VIDEO, SENTRY, VMC
         and SMC herein shall be true and correct in all material
         respects on and as of the Effective Time, with the same
         force and effect as though such representations and
         warranties had been made on and as of the Effective Time,
         except for changes permitted or contemplated by this
         Agreement and except for representations and warranties
         that are made as of a specific date or time, which shall be
         true and correct in all material respects only as of such
         specific date or time.

                  (b) COMPLIANCE WITH COVENANTS. Each of VIDEO, SENTRY, VMC and
         SMC shall have performed in all material respects all obligations and
         agreements, and complied in all material respects with all covenants,
         contained in this Agreement to be performed or complied with by it
         prior to or on the Effective Time.

                  (c) OFFICER'S CERTIFICATES. KNOGO shall have received such
         certificates of VIDEO, SENTRY, VMC and SMC, dated the Closing Date,
         signed by an executive officer of VIDEO, SENTRY, VMC and SMC to
         evidence satisfaction of the conditions set forth in this Article V
         (insofar as each relates to VIDEO, SENTRY, VMC or SMC) as may be
         reasonably requested by KNOGO.

                  (d) LEGAL OPINION. KNOGO shall have received the opinion of
         Stroock & Stroock & Lavan, special counsel to KNOGO, based upon
         reasonably requested representation letters and dated the Closing Date,
         to the effect that the KNOGO Merger will be treated for federal income
         tax purposes as a transfer of property to SENTRY by holders of KNOGO
         Shares governed by Section 351 of the Code.

                  (e)      FURST NOTE.  Robert Furst shall have purchased
         from SENTRY its subordinated promissory note in the
         original principal amount of $575,000, having the terms set forth
         in EXHIBIT D.

     7.3 CONDITIONS PRECEDENT TO THE OBLIGATIONS OF VIDEO, SENTRY, VMC AND SMC.
The obligation of VIDEO, SENTRY, VMC and SMC to effect the Reorganization is
also subject to the satisfaction at or prior to the Effective Time of each of
the following additional conditions, unless waived by VIDEO:

                  (a)  ACCURACY OF REPRESENTATIONS AND WARRANTIES.  All
         representations and warranties made by KNOGO herein shall
         be true and correct in all material respects on and as of the
         Effective Time, with the same force and effect as though
         such representations and warranties had been made on and as
         of the Effective Time, except for changes permitted or
         contemplated by this Agreement and except for
         representations and warranties that are made as of a
         specific date or time, which shall be true and correct in
         all material respects only as of such specific date or time.

                  (b) COMPLIANCE WITH COVENANTS. KNOGO shall have performed in
         all material respects all obligations and agreements, and complied in
         all material respects with all covenants, contained in this Agreement
         to be performed or complied with by it prior to or on the Effective
         Time.

                  (c) OFFICER'S CERTIFICATES. VIDEO shall have received such
         certificate of KNOGO, dated the Closing Date, signed by an executive
         officer of KNOGO to evidence satisfaction of the conditions set forth
         in this Article V (insofar as each relates to KNOGO) as may be
         reasonably requested by VIDEO.

                  (d) LEGAL OPINION. VIDEO shall have received the opinion of
         Dewey Ballantine, special counsel to VIDEO, based upon reasonably
         requested representation letters and dated the Closing Date, to the
         effect that the VIDEO Merger will be treated for federal income tax
         purposes as a reorganization described in Section 368(a) of the Code
         and/or as a transfer of property to SENTRY by holders of VIDEO Shares
         governed by Section 351 of the Code.


                                  ARTICLE VIII

                                   TERMINATION

                  8.1 TERMINATION. This Agreement may be terminated and the
Reorganization may be abandoned at any time (notwithstanding approval of the
KNOGO Merger by the stockholders of KNOGO and the VIDEO Merger by the
stockholders of VIDEO, if required by applicable provisions of the DGCL and the
Minnesota Act), prior to the Effective Time:

                  (a)  by mutual written consent of KNOGO and VIDEO;

                  (b) by either KNOGO or VIDEO, if the Effective Time shall not
         have occurred on or before 180 days from the date hereof; PROVIDED,
         that the right to terminate this Agreement under this clause (b) shall
         not be available to any party whose misrepresentation in this Agreement
         or whose failure to perform any of its covenants and agreements or to
         satisfy any obligation under this Agreement has been the cause of or
         resulted in the failure of the Reorganization to occur on or before
         such date;

                  (c) by either KNOGO or VIDEO, if (i) any federal or state
         court of competent jurisdiction or other federal or state governmental
         or regulatory body shall have issued any judgment, injunction, order or
         decree prohibiting, enjoining or otherwise restraining the transactions
         contemplated by this Agreement and such judgment, injunction, order or
         decree shall have become final and nonappealable (PROVIDED, that the
         party seeking to terminate this Agreement pursuant to this clause (c)
         shall have used commercially reasonable efforts to remove such
         judgment, injunction, order or decree) or (ii) any statute, rule,
         regulation or executive order promulgated or enacted by any federal or
         state governmental authority after the date of this Agreement which
         prohibits the consummation of the Reorganization shall be in effect;

                  (d) by either KNOGO or VIDEO, if this Agreement is not adopted
         or the VIDEO Merger or the KNOGO Merger is not approved by the
         stockholders of VIDEO or KNOGO as required by Section 7.1;

                  (e) by VIDEO, if there shall have been a material breach of
         any representation, warranty or material covenant or agreement on the
         part of KNOGO, which is not cured after thirty (30) days' written
         notice by VIDEO to KNOGO; or

                  (f) by KNOGO, if there shall have been a material breach of
         any representation, warranty or material covenant or agreement on the
         part of VIDEO, which is not cured after thirty (30) days' written
         notice by KNOGO to VIDEO.

                  (g) by either VIDEO or KNOGO, if (i) the KNOGO Board shall
         withdraw or modify in a manner adverse to VIDEO its approval or
         recommendation of the KNOGO Merger or shall have resolved to do any of
         the foregoing pursuant to Section 6.6 or (ii) any Person or group of
         Persons shall have made an Acquisition Proposal that the KNOGO Board
         determines in good faith, after consultation with outside counsel, that
         the failure to accept such Acquisition Proposal could reasonably be
         deemed to cause the members of the KNOGO Board to breach their
         fiduciary duties under applicable law.

                  (h) by either KNOGO or VIDEO, if (i) the VIDEO Board shall
         withdraw or modify in a manner adverse to KNOGO its approval or
         recommendation of the VIDEO Merger or shall have resolved to do any of
         the foregoing pursuant to Section 6.6 or (ii) any Person or group of
         Persons shall have made an Acquisition Proposal that the VIDEO Board
         determines in good faith, after consultation with outside counsel, that
         the failure to accept such Acquisition Proposal could reasonably be
         deemed to cause the members of the VIDEO Board to breach their
         fiduciary duties under applicable law.

                  8.2 EFFECT OF TERMINATION. In the event of any termination of
this Agreement pursuant to Section 8.1, this Agreement forthwith shall become
void and of no further force or effect, and no party hereto (or any of its
affiliates, directors, officers, agents or representatives) shall have any
liability or obligation hereunder, except in any such case (a) as provided in
Sections 6.2(b) (Confidentiality), 6.5 (Public Announcements) and 6.12 (Fees and
Expenses), which shall survive any such termination and (b) to the extent such
termination results from the breach by such party of any of its representations,
warranties, covenants or agreements contained in this Agreement.


                                   ARTICLE IX

                                  MISCELLANEOUS

     9.1 NONSURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS. None of the
representations, warranties, covenants or agreements contained in this Agreement
or in any certificate or other instrument delivered pursuant to this Agreement
shall survive the Effective Time, except for the covenants and agreements
contained in Sections 6.2(b) (Confidentiality), 6.5 (Public Announcements), 6.10
(D&O Indemnification and Insurance), 6.11 (Employee Benefits) and 6.12 (Fees and
Expenses).

     9.2 NOTICES. All notices and other communications given or made pursuant
hereto shall be in writing and shall be deemed to have been duly given or made
as of the date delivered, mailed or transmitted, and shall be effective upon
receipt, if delivered personally, mailed by registered or certified mail
(postage prepaid, return receipt requested) or sent by fax (with immediate
confirmation) or nationally recognized overnight courier service, as follows:

                  (a)      if to VIDEO, to:

                           Video Sentry Corporation
                           6365 Carlson Drive
                           Eden Prairie, Minnesota 55346

                           Attn: Andrew L. Benson, President
                           Fax:  (612) 965-6472

                           with a copy to:

                           Dewey Ballantine
                           333 South Hope Street, 30th Floor
                           Los Angeles, California 90071
                           Attn: Robert M. Smith
                           Fax: (213) 625-0562

                  (b)      if to KNOGO, to:

                           Knogo North America Inc.
                           350 Wireless Boulevard
                           Hauppauge, Long Island, New York 11788-3907

                           Attn: Thomas A. Nicolette, President
                           Fax:  (516) 232-4750

                           with a copy to:

                           Stroock & Stroock & Lavan
                           7 Hanover Square
                           New York, New York 10004
                           Attn: David H. Kaufman
                           Fax: (212) 806-6006

                  (c)      if to SENTRY prior to the Effective Time, to:

                           Sentry Technology Corporation
                           c/o Video Sentry Corporation
                           6365 Carlson Drive
                           Eden Prairie, Minnesota 55346

                           Attn: President
                           Fax:  (612) 975-6472

                           with a copy to:

                           Dewey Ballantine
                           333 South Hope Street, 30th Floor
                           Los Angeles, California 90071
                           Attn: Robert M. Smith
                           Fax: (213) 625-0562

                  (d)      if to SENTRY subsequent to the Effective Time, to:

                           Sentry Technology Corporation
                           c/o Knogo North America Inc.
                           350 Wireless Boulevard
                           Hauppauge, New York 11788-3907

                           Attn: President
                           Fax:  (516) 232-4750

                           with a copy to:

                           Stroock & Stroock & Lavan
                           7 Hanover Square
                           New York, New York 10004
                           Attn: David H. Kaufman
                           Fax: (212) 806-6006

or to such other Person or address or facsimile number as any party shall
specify by like written notice to the other parties hereto (any such notice of a
change of address to be effective only upon actual receipt thereof).

     9.3 CERTAIN DEFINITIONS. The following terms, when used in this Agreement,
shall have the following respective meanings:

                  (a)  "AFFILIATE" shall have the meaning assigned to
         such term in Section 12(b)-2 of the Exchange Act.

                  (b)  "BUSINESS DAY" shall have the meaning set forth
         in Rule 14d-1(c)(6) under the Exchange Act.

                  (c)  "KNOWLEDGE" means the actual knowledge of the
         executive officers of KNOGO or VIDEO, as the case may be.

                  (d)  "MATERIAL ADVERSE EFFECT" means, with respect to any
         Person, any change or effect which is materially adverse to the
         financial condition or results of operations of such Person and its
         subsidiaries, taken as a whole, excluding in all cases: (i) events or
         conditions generally affecting the industry in which such Person and
         its subsidiaries operate or arising from changes in general business or
         economic conditions; (ii) any effect resulting from any change in law
         or generally accepted accounting principles, which affect generally
         entities such as such Person; (iii) events resulting directly or
         indirectly from the execution and/or announcement of this Agreement,
         including, without limitation, the cancellation or postponement of
         customer orders or the absence of new customer sales during the
         pendency of the Agreement; and (iv) any effect resulting from
         compliance by such Person with the terms of this Agreement.

                  (e)  "PERSON" means any natural person, corporation,
         limited liability company, partnership, unincorporated
         organization or other entity.

                  (f)  "SUBSIDIARY" of any Person means any other corporation or
         entity of which such Person owns, directly or indirectly, stock or
         other equity interests having a majority of the votes entitled to be
         cast in the election of directors of such corporation or entity under
         ordinary circumstances or of which such Person owns a majority
         beneficial interest.

     9.4 ENTIRE AGREEMENT. This Agreement (including the schedules, exhibits and
other documents referred to herein), together with the Confidentiality
Agreements referred to in Section 4.2(b), constitutes the entire agreement
between and among the parties hereto and supersedes all prior agreements and
understandings, oral and written, between or among any of the parties with
respect to the subject matter hereof.

     9.5 ASSIGNMENT; BINDING EFFECT. Neither this Agreement nor any of the
rights, benefits or obligations hereunder may be assigned, in whole or in part,
by any party (whether by operation of law or otherwise) without the prior
written consent of the other parties hereto. Subject to the preceding sentence,
this Agreement shall be binding upon, inure to the benefit of and be enforceable
by the parties and their respective successors and assigns. Nothing in this
Agreement, expressed or implied, is intended to confer on any person other than
the parties or their respective successors and assigns, any rights, remedies,
obligations or liabilities under or by reason of this Agreement, other than
rights conferred upon third parties under Sections 6.10 and 6.11.

     9.6 AMENDMENTS. This Agreement may be amended by the parties at any time
prior to the Effective Time; PROVIDED, that, after approval of this Agreement
and either the KNOGO Merger or the VIDEO Merger by the stockholders of VIDEO or
KNOGO if required under applicable law, no amendment shall be made which by law
requires further approval by the stockholders of VIDEO and KNOGO, without such
approval. This Agreement may not be amended or modified except by an instrument
in writing signed on behalf of each of the parties hereto.

     9.7 WAIVERS. At any time prior to the Effective Time, VIDEO, on the one
hand, or KNOGO, on the other hand, may, to the extent legally allowed, (a)
extend the time specified herein for the performance of any of the obligations
or other acts of the other, (b) waive any inaccuracies in the representations
and warranties of the other contained herein or in any document delivered
pursuant hereto, or (c) waive compliance by the other with any of the agreements
or covenants of such other party or parties (as the case may be) contained
herein. Any such extension or waiver shall be valid only if set forth in a
written instrument signed on behalf of the party or parties to be bound thereby.
No such extension or waiver shall constitute a waiver of, or estoppel with
respect to, any subsequent or other breach or failure to strictly comply with
the provisions of this Agreement. The failure of any party to insist on strict
compliance with this Agreement or to assert any of its rights or remedies
hereunder or with respect hereto shall not constitute a waiver of such rights or
remedies.

     9.8 VALIDITY. The invalidity or unenforceability of any provisions of this
Agreement shall not affect the validity or enforceability of any other
provisions of this Agreement, which shall remain in full force and effect.

     9.9 CAPTIONS. The table of contents and headings contained in this
Agreement are for reference purposes only and shall not affect in any way the
meaning or interpretation of this Agreement.

     9.10 COUNTERPARTS. This Agreement may be executed in counterparts, each of
which shall be deemed to be an original, and all of which together shall be
deemed to be one and the same instrument.

     9.11 GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the internal laws of the State of Delaware, without regard to
any applicable principles of conflicts of law.

                                      * * *

<PAGE>

                  IN WITNESS WHEREOF, the parties have executed this Agreement
and Plan of Reorganization and Merger as of the date first above written.

                            VIDEO SENTRY CORPORATION


                            By:
                            Name:
                            Title:



                            KNOGO NORTH AMERICA INC.


                            By:
                            Name:
                            Title:


                            SENTRY TECHNOLOGY CORPORATION


                            By:
                            Name:
                            Title:



                            VIKING MERGER CORP.


                            By:
                            Name:
                            Title:



                            STRIP MERGER CORP.


                            By:
                            Name:
                            Title:
<PAGE>



                                    EXHIBIT A

                              AMENDED AND RESTATED

                          CERTIFICATE OF INCORPORATION

                                       OF

                          SENTRY TECHNOLOGY CORPORATION

                            (A DELAWARE CORPORATION)



     FIRST. The name of the corporation is SENTRY TECHNOLOGY CORPORATION (the
"Corporation")

     SECOND. The address of the Corporation's registered office in the State of
Delaware is Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware
19801. The name of the Corporation's registered agent at such address is
Corporation Trust Company.

     THIRD. The purpose of the Corporation is to engage in any lawful act or
activity for which corporations may be organized under the Delaware General
Corporation Law ("DGCL").

     FOURTH. The total number of shares of stock which the Corporation shall
have the authority to issue is one hundred million (100,000,000) shares of
common stock, par value $0.001 per share (the "Common Stock"), and twenty-five
million (25,000,000) shares of preferred stock, par value $0.001 per share (the
"Preferred Stock"), of which six million (6,000,000) shares shall be designated
Class A Preferred Stock (the "Class A Preferred Stock"). Each share of Class A
Preferred Stock shall have a face value of $5.00 (the "Face Value").

I.   COMMON STOCK.

     A statement of the designations, powers, preferences, rights,
qualifications, limitations and restrictions in respect of the Common Stock is
as follows:

     A. DIVIDENDS. Subject to the provisions of this Article FOURTH, the Board
of Directors (the "Board") of the Corporation may cause dividends to be paid to
the holders of shares of Common Stock out of funds legally available for the
payment of dividends by declaring an amount per share as a dividend.

     B. LIQUIDATION. Subject to the provisions of this Article FOURTH, in the
event of any voluntary or involuntary liquidation, dissolution or winding up of
the Corporation, the holders of shares of Common Stock shall be entitled to
share in all remaining assets of the Corporation available for distribution to
its stockholders.

     C. VOTING RIGHTS. Subject to the provisions of this Article FOURTH, and
except as otherwise required by law, each outstanding share of Common Stock
shall be entitled to vote on each matter on which the stockholders of the
Corporation shall be entitled to vote, and each holder of Common Stock shall be
entitled to one vote for each share of such stock held by such holder.

II.  PREFERRED STOCK.

     Shares of the Preferred Stock may be issued from time to time in one or
more classes or series, each of which class or series shall have such
distinctive designation or title as shall be set forth below or fixed by the
Board prior to the issuance of any shares thereof. Each such class or series of
the Preferred Stock shall be issued for such consideration and shall have such
voting powers, full or limited, or no voting powers, and such preferences and
relative participating optional and other special rights and such
qualifications, limitations or restrictions thereof, as shall be stated in such
resolution providing for the issue of such class or series of the Preferred
Stock as may be adopted from time to time by the Board prior to the issuance of
any shares thereof pursuant to the authority hereby expressly vested in it, all
in accordance with the laws of the State of Delaware. All shares of any one
class or series of the Preferred Stock shall be alike in every particular. The
Board is further authorized to increase or decrease (but not below the number of
such shares of series then outstanding) the number of shares of any series
subsequent to the issuance of shares of that series.

     Statements of the designations, powers, preferences, rights,
qualifications, limitations and restrictions in respect of the Class A Preferred
Stock are as follows:

     A.  CLASS A PREFERRED STOCK.

         1. RANK. The Class A Preferred Stock shall, with respect to
dividend rights and rights on liquidation, winding up or dissolution, rank (i)
on parity with, or junior to, as the case may be, any other class or series of
Preferred Stock established by the Board, the terms of which shall specifically
provide that such class or series shall rank on parity with, or senior to, the
Class A Preferred Stock with respect to dividend rights and rights on
liquidation, winding up or dissolution, and (ii) except as set forth below,
prior to any other equity securities of the Corporation with respect to dividend
rights and rights on liquidation, winding up or dissolution (all of such equity
securities of the Corporation to which the Class A Preferred Stock ranks prior,
including the Common Stock, are at times collectively referred to herein as the
"Junior Stock").

         2. DIVIDEND.

            (a) The annual dividend rate on each share of
the Class A Preferred Stock shall be fixed at five percent (5%) of the Face
Value, payable in accordance with this paragraph 2 (the "Dividend"). The holders
of shares of the Class A Preferred Stock shall be entitled to receive Dividends
on the following dates (each, a "dividend payment date"): , 1997/8, , 1998/9, ,
1998/9,
                 , 1999/2000,                , 1999/2000 and
               , 2000/2001; the 12 month period ending on each of the first
two dividend payment dates is an "annual dividend period," the six month period
ending on each of the next four dividend payment dates is a "semi-annual
dividend period" and each such annual dividend period or semi-annual dividend
period is a "dividend period." Dividends (whether or not declared) shall be
payable in additional shares of the Class A Preferred Stock during the two
annual dividend periods ending on the first two dividend payment dates
subsequent to issuance of the Class A Preferred Stock, such that holders shall
receive a Dividend of 1/20th of a share of Class A Preferred Stock for each
share of Class A Preferred Stock held. Thereafter, the holders of shares of the
Class A Preferred Stock shall be entitled to receive, in preference to dividends
on the Junior Stock, and whether or not declared the Dividend (including any
Dividend accrued and unpaid) payable in cash, out of funds legally available for
the payment of dividends, such that holders shall receive a Dividend of $0.25
for each share of Class A Preferred Stock held, which Dividend shall accrue
semi-annually and be due in equal installments on each of the last four
dividend payment dates. Dividends shall be paid on the applicable dividend
payment date to the holders of record at the close of business on the date (the
"record date") specified by the Board at the time such Dividend is declared;
PROVIDED, HOWEVER, that such record date shall not be more than 60 days nor less
than 10 days prior to the applicable dividend payment date. For the purposes of
this paragraph, each additional share of the Class A Preferred Stock issued as a
Dividend shall be valued at the Face Value. Dividends (whether payable in cash
or in stock) shall be fully cumulative and shall accrue, with additional
payments thereon, from the first day of the dividend period in which such
Dividend may be payable as herein provided on all shares of the Class A
Preferred Stock issued and outstanding on the first day of such dividend period,
except that with respect to the initial dividend period, such Dividend shall
accrue from the date of issue. If the dividend payment date is not a business
day, the dividend payment date shall be the next succeeding business day.

                (b)  All Dividends paid with respect to shares of
the Class A Preferred Stock pursuant to paragraph 2(a) shall be paid pro rata to
the holders entitled thereto.

                (c)  If at any time the Corporation shall have
failed to pay all dividends which have accrued on any outstanding shares of any
other class or series of the Preferred Stock having cumulative dividend rights
ranking on parity with the shares of the Class A Preferred Stock at the times
such dividends are payable or the Corporation shall fail to redeem any of such
stock on the date set for the redemption thereof, no cash Dividend shall be
declared by the Board or paid or set apart for payment by the Corporation on
shares of the Class A Preferred Stock unless prior to or concurrently with such
declaration, payment or setting apart for payment, all accrued and unpaid
dividends on all outstanding shares of such other series of the Preferred Stock
shall have been or be declared, paid or set apart for payment, with additional
payments thereon, if any; PROVIDED, HOWEVER, that in the event such failure to
pay accrued dividends is with respect only to the outstanding shares of the
Class A Preferred Stock and any outstanding shares of any other class or series
of the Preferred Stock having cumulative dividend rights on parity with the
shares of the Class A Preferred Stock, cash dividends may be declared, paid or
set apart for payment, with additional payment thereon, pro rata on shares of
the Class A Preferred Stock and shares of such other class or series of the
Preferred Stock so that the amounts of any cash dividends declared, paid or set
apart for payment on shares of the Class A Preferred Stock and shares of such
other series of the Preferred Stock shall in all cases bear to each other the
same ratio that, at the time of such declaration, payment or setting apart for
payment, all accrued but unpaid cash dividends on shares of the Class A
Preferred Stock and shares of such other series of the Preferred Stock bear to
each other. Any Dividend not paid pursuant to paragraph 2(a) hereof or this
paragraph 2(c) shall be fully cumulative and shall accrue with additional
payments thereon, as set forth in paragraph 2(a) hereof.

                (d) (i) Holders of shares of the Class A Preferred
         Stock shall be entitled to receive the Dividends provided for in
         paragraph 2(a) hereof in preference to and in priority over any
         dividends other than dividends paid in Junior Stock upon any of the
         Junior Stock.

                           (ii) So long as any shares of the Class A Preferred
         Stock are outstanding, the Corporation shall not declare, pay or set
         apart for payment any dividend on any of the Junior Stock (other than
         dividends paid in such Junior Stock) or make any payment on account of,
         or set apart for payment money for a sinking or other similar fund for,
         the purchase, redemption or other retirement of, any of the Junior
         Stock or any warrants, rights, calls or options exercisable for any of
         the Junior Stock, or make any distribution in respect thereof, either
         directly or indirectly, and whether in cash, obligations or shares of
         the capital stock of the Corporation or other property (other than
         distributions or dividends in stock to the holders of such stock), and
         shall not permit any corporation or other entity directly or indirectly
         controlled by the Corporation to purchase or redeem any of the Junior
         Stock or any warrants, rights, calls or options exercisable for any of
         the Junior Stock, unless prior to or concurrently with such
         declaration, payment, setting apart for payment, purchase or
         distribution, as the case may be, all accrued and unpaid cash
         Dividends, including additional payments thereon, on shares of the
         Class A Preferred Stock not paid in accordance with the provisions of
         paragraph 2(a) hereof shall have been or be paid and the Corporation
         shall have redeemed those shares of the Class A Preferred Stock
         required to be redeemed theretofore by the terms hereof.

                (e)  Subject to the foregoing provisions of this
paragraph 2, the Board may declare and the Corporation may pay or set apart for
payment dividends and other distributions on any of the Junior Stock, and may
purchase or otherwise redeem any of the Junior Stock or any warrants, rights or
options exercisable for any of the Junior Stock; PROVIDED, HOWEVER, that a
decision by the Board to declare a dividend on any of the Junior Stock shall
require approval by that number of directors representing at least 662/3% of the
Board, less any vacancies on the Board. In such event, the holders of the Class
A Preferred Stock and the holders of such Junior Stock shall share equally,
share and share alike, in the distribution of any and all dividends declared on
such Junior Stock, provided that for this purpose each share of Class A
Preferred Stock shall be treated as one share of such Junior Stock.

                (f)  The Corporation shall not be required to
issue fractional shares of Class A Preferred Stock as a result of the payment of
Dividends. If any fraction of a share of Class A Preferred Stock would be
issuable upon the payment of a Dividend, the Corporation may, in lieu of issuing
such fractional share, pay to such holder for any such fraction of a share an
amount in cash equal to the product obtained by multiplying (i) such fraction by
(ii) the Face Value.

                (g)  Whenever, at any time or times, any Dividend
payable shall be in arrears, the holders of the outstanding shares of Class A
Preferred Stock shall have the right, voting separately as a class, to elect one
director of the Corporation. Upon the vesting of such right of the holders of
Class A Preferred Stock, the maximum authorized number of members of the Board
shall automatically be increased by one and the one vacancy so created shall be
filled by vote of the holders of the outstanding shares of Class A Preferred
Stock. The right of the holders of Class A Preferred Stock to elect a member of
the Board as aforesaid shall continue until such time as all Dividends in
arrears shall have been paid in full, at which time such right shall terminate,
except as herein or by law expressly provided, subject to revesting in the event
of each and every subsequent default of the character above described. Upon
termination of such special voting rights attributable to holders of the Class A
Preferred Stock pursuant to this paragraph, the term of office of any director
elected by the holders of shares of Class A Preferred Stock (any such director,
a "Class A Preferred Stock Director") pursuant to such special voting rights
shall immediately terminate and the number of directors constituting the entire
Board shall be reduced by one. Any Class A Preferred Stock Director may be
removed by, and shall not be removed otherwise than by, a majority vote of the
outstanding shares of Class A Preferred Stock. If the office of any Class A
Preferred Stock Director becomes vacant by reason of death, resignation,
retirement, disqualification, removal from office, or otherwise, a successor who
shall hold office for the unexpired term in respect of which such vacancy
occurred shall be elected by the holders of the outstanding shares of Class A
preferred Stock, voting separately as a class.

  3.     ADJUSTMENT OF HURDLE PRICE.

         (a)      To preserve the actual or potential economic
value of the Class A Preferred Stock, if at any time after the date of this
Amended and Restated Certificate of Incorporation (the "Certificate"), there
shall be any change in the Common Stock, whether by reason of stock dividends,
stock splits, recapitalizations, mergers, consolidations, combinations or
exchanges of securities, split-ups, split-offs, spin-offs, liquidations, other
similar changes in capitalization, any distribution or issuance of cash, assets,
evidences of indebtedness or subscription rights, options or warrants to holders
of Common Stock (other than regular cash dividends) or otherwise, then, in each
such event the Board shall make such appropriate adjustments in the Hurdle Price
(as defined below) such that following such adjustments, such event shall not
have had the effect of increasing, reducing or limiting the benefits the holders
of shares of Class A Preferred Stock would have had absent such event.

         (b)      The "Deemed Value" as used herein shall
equal the Face Value plus the amount by which the Closing Price exceeds the
Hurdle Price on the date of the relevant event. The "Hurdle Price" as used
herein shall equal $6.50, subject to adjustment pursuant to paragraph 3 above.
The "Closing Price" as used herein shall mean the average of the closing prices
for a share of Common Stock on the twenty (20) consecutive trading days ending
on the trading date last preceding an optional redemption date, the Mandatory
Redemption Date (as defined below), the date of an event described in paragraph
4(a) above or the closing date of an Acquisition (as defined below), as the case
may be, as reported on the National Association of Securities Dealers, Inc.'s
Automated Quotations System ("Nasdaq") or if such closing prices shall not be
reported on Nasdaq, the average of the closing prices, regular way, for a share
of such security on the principal national securities exchange on which such
security is listed on such twenty (20) consecutive trading days, or if such
security is not listed on any national securities exchange, the average of the
mean between the closing bid and asked prices of a share of such security on
such twenty (20) consecutive trading days as reported, or if such prices shall
not be so reported, as the same shall be reported by the National Quotation
Bureau, Incorporated or, in all other cases, the value set in good faith by the
Board.
 
  4.     LIQUIDATION PREFERENCE.

         (a)      In the event of any voluntary or involuntary
liquidation, dissolution or winding up of the affairs of the Corporation, the
holders of shares of the Class A Preferred Stock then outstanding shall be
entitled to be paid out of the assets of the Corporation available for
distribution to its stockholders an amount in cash for each share outstanding
equal to (i) the Deemed Value on the date of such an event plus (ii) an amount
in cash equal to all accrued but unpaid Dividends thereon, plus additional
dividends on unpaid Dividends accrued prior to the commencement of the
then-current dividend period, to the date fixed for liquidation, before any
payment shall be made or any assets distributed to the holders of any of the
Junior Stock. If the assets of the Corporation are not sufficient to pay in full
the liquidation payments payable to the holders of outstanding shares of the
Class A Preferred Stock and any other class or series of the Preferred Stock
having liquidation rights on parity with the shares of the Class A Preferred
Stock, then the holders of all such shares shall share ratably in such
distribution of assets in accordance with the amount which would be payable on
such distribution if the amounts to which the holders of outstanding shares of
the Class A Preferred Stock and the holders of outstanding shares of such other
series of the Preferred Stock are entitled were paid in full.

         (b)      The liquidation payment with respect to each
fractional share of the Class A Preferred Stock outstanding, if any, shall be
equal to a ratably proportionate amount of the liquidation payment with respect
to each outstanding share of the Class A Preferred Stock.

         (c)      For purposes of this paragraph 4, neither
the voluntary sale, conveyance, exchange or transfer (for cash, shares of stock,
securities or other consideration) of all or substantially all the property or
assets of the Corporation nor the consolidation or merger of the Corporation
with one or more other corporations shall be deemed to be a liquidation,
dissolution or winding up, voluntary or involuntary, unless such voluntary sale,
conveyance, exchange or transfer shall be in connection with a dissolution or
winding up of the business of the Corporation.

         (d)      Any sale, lease or conveyance of all or
substantially all of the Corporation's assets or merger or consolidation of the
Corporation which results in the holders of the Common Stock receiving in
exchange for such Common Stock either cash or notes, debentures or other
evidences of indebtedness or obligations to pay cash or preferred stock of the
surviving entity which ranks on parity with the Class A Preferred Stock in
liquidation or dividends shall be deemed to be a liquidation, dissolution or
winding up of the affairs of the Corporation within the meaning of this
paragraph 4. In the cases of merger or consolidation of the Corporation where
holders of the Common Stock receive, in exchange for such Common Stock, common
stock or preferred stock which is junior in liquidation and dividends to the
Class A Preferred Stock in the surviving entity (whether or not such surviving
entity is the Corporation) of such merger or consolidation or preferred stock of
another entity, the Class A Preferred Stock shall be deemed to be preferred
stock of such surviving entity or other entity, as the case may be, with the
same annual dividend rate and equivalent rights to the rights set forth herein
and the merger or consolidation agreement shall expressly so provide. In the
event of a merger or consolidation of the Corporation where the consideration
received by the holders of the Common Stock consists of two or more of the types
of consideration set forth above, the holders of the Class A Preferred Stock
shall be entitled to receive either cash or securities based upon the foregoing
in the same proportion as the holders of the Common Stock of the Corporation are
receiving cash or debt securities, or equity securities in the surviving entity
or another entity.

         (e)      Notwithstanding paragraph 4(a), in the event
of any voluntary or involuntary liquidation, dissolution or winding up of the
affairs of the Corporation, the holders of Class A Preferred Stock shall receive
the greater of (i) the amount payable under paragraph 4(a) above or (ii) the
amount which would be the liquidation payment per share of Common Stock if the
Class A Preferred Stock were effectively redeemed for Common Stock prior to such
liquidation, for which purpose the Class A Preferred Stock shall be treated as
representing an equal number of shares of Common Stock.

 5.      REDEMPTION.

         (a)      OPTIONAL REDEMPTION.  Prior to the first
anniversary of the date of issuance of the Class A Preferred Stock, the
Corporation shall not redeem the Class A Preferred Stock. Subject to the
preceding sentence and the requirements of paragraph 5(b) hereof, the
Corporation may, at its option, redeem the Class A Preferred Stock, at any time
in whole at the Deemed Value, together with accrued and unpaid Dividends, if
any, thereon. If the Corporation has completed a Public Offering (as defined
below) or an Acquisition more than 35 days prior to the Mandatory Redemption
Date, then the Corporation may, at its option, redeem the Class A Preferred
Stock, in whole at the Deemed Value, together with accrued and unpaid Dividends,
if any, thereon, subject to the following conditions: (i) the redemption shall
be declared on the closing date of such Public Offering or Acquisition, (ii) the
redemption date shall be fixed no later than 35 days after such closing date,
(iii) for purposes of determining the Deemed Value in the case of a Public
Offering, the Closing Price shall equal the price per share at which Common
Stock is issued in such Public Offering and (iv) for purposes of determining the
Deemed Value in the case of an Acquisition, the Closing Price shall be
determined as of the closing date of such Acquisition. "Public Offering" as used
herein shall mean an underwritten public offering of Common Stock with net
proceeds resulting therefrom in excess of $12,000,000. "Acquisition" as used
herein shall mean an acquisition by the Corporation of property of or securities
issued by a third party in which the consideration paid by the Corporation (i)
consists, in whole or in part, of shares of Common Stock and (ii) the aggregate
value of such shares of Common Stock exceeds $12,000,000; PROVIDED that such
aggregate value shall equal the number of such shares of Common Stock multiplied
by the Closing Price as of the closing date of such Acquisition.

         (b)      MANDATORY REDEMPTION.  On the fourth
anniversary of the date of issuance of the Class A Preferred Stock (the
"Mandatory Redemption Date"), so long as any shares of the Class A Preferred
Stock shall be outstanding, the Corporation shall redeem any issued and
outstanding Class A Preferred Stock at the Deemed Value, together with accrued
and unpaid Dividends, if any, thereon, payable in cash (to the extent the
Corporation shall have funds legally available for such payment) or Common
Stock. The price of such Common Stock shall be its Closing Price. To the extent
that funds are not legally available on the Mandatory Redemption Date for the
payment in cash for the mandatory redemption of the Class A Preferred Stock and
the Corporation does not issue Common Stock as payment for such mandatory
redemption, the provisions of paragraph 7 shall apply.

         (c)      ACQUIRED SHARES.  Shares of the Class A
Preferred Stock which have been issued and reacquired in any manner, including
shares purchased or redeemed, shall (upon compliance with any applicable
provisions of the laws of the State of Delaware) have the status of authorized
and unissued shares of Preferred Stock undesignated as to class or series and
may be redesignated and reissued as part of any class or series of the Preferred
Stock; PROVIDED, HOWEVER, that no such issued and reacquired shares of the Class
A Preferred Stock shall be reissued or sold as Class A Preferred Stock.

  6.     PROCEDURE FOR REDEMPTION.

         (a)      MANNER OF NOTICE.  In the event the
Corporation shall redeem shares of the Class A Preferred Stock, notice of such
redemption shall be given by first class mail, postage prepaid, mailed not less
than 30 days nor more than 60 days prior to the redemption date, to each holder
of record of the shares to be redeemed at such holder's address as the same
appears on the stock register of the Corporation. Each such notice shall state
(i) the redemption date; (ii) the aggregate number of shares of the Class A
Preferred Stock to be redeemed; (iii) the redemption payment and to what extent
such redemption payment will be paid in cash and/or Common Stock; (iv) the place
or places where certificates for such shares are to be surrendered for the
redemption payment; and (v) that Dividends on the shares to be redeemed will
cease to accrue on such redemption date.

         (b)      EFFECT OF NOTICE; REDEMPTION.  Notice having
been mailed as aforesaid, from and after the redemption date (unless default
shall be made by the Corporation in providing money for the payment of the
redemption of the shares so called for redemption), Dividends on the shares of
the Class A Preferred Stock so called for redemption shall cease to accrue, and
said shares shall no longer be deemed to be outstanding, and all rights of the
holders thereof as stockholders of the Corporation (except the right to receive
from the Corporation the redemption payment) shall cease. Upon surrender in
accordance with said notice of the certificates for any shares so redeemed
(properly endorsed or assigned for transfer, if the Board shall so require and
the notice shall so state), such shares shall be redeemed by the Corporation at
the Deemed Value plus accrued and unpaid Dividends.

  7.     CONVERSION TO NOTES.

         (a)      To the extent that funds are not legally
available on the Mandatory Redemption Date for the payment in cash for the
mandatory redemption of the Class A Preferred Stock, and the Corporation does
not issue Common Stock as payment for such mandatory redemption, as required
herein, each outstanding share of Class A Preferred Stock shall automatically
convert (the "Conversion") into a subordinated note (the "Subordinated Note")
given by the Corporation for the benefit of the holder thereof. Each
Subordinated Note shall be in a principal amount equal to the Deemed Value plus
accrued and unpaid Dividends. The Subordinated Notes (i) shall bear interest at
a rate of six percent (6%) per annum, (ii) shall mature at the end of one year
from the date of Conversion, and (iii) upon maturity, shall become due and
payable as to any outstanding principal and interest.

         (b)      At the time of the Conversion, the holders
of the Subordinated Notes shall have the right, voting separately as a class, to
elect one director of the Corporation. Upon the vesting of such right of the
holders of the Subordinated Notes, the maximum authorized number of members of
the Board shall automatically be increased by one and the one vacancy so created
shall be filled by vote of the holders of the Subordinated Notes. The right of
the holders of the Subordinated Notes to elect a member of the Board as
aforesaid shall continue until such time as the Subordinated Notes have been
paid in full, at which time such right shall terminate, except as herein or by
law expressly provided. Upon termination of such special voting rights
attributable to holders of the Subordinated Notes pursuant to this paragraph,
the term of office of any director elected by the holders of Subordinated Notes
(any such director, a "Subordinated Notes Director") pursuant to such special
voting rights shall immediately terminate and the number of directors
constituting the entire Board shall be reduced by one. Any Subordinated Notes
Director may be removed by, and shall not be removed otherwise than by, a
majority vote of the outstanding Subordinated Notes. If the office of any
Subordinated Notes Director becomes vacant by reason of death, resignation,
retirement, disqualification, removal from office, or otherwise, a successor who
shall hold office for the unexpired term in respect of which such vacancy
occurred shall be elected by a majority of the outstanding Subordinated Notes,
voting separately as a class.

         (b)      The indebtedness represented by the
Subordinated Notes and the payment of the principal of and any interest on each
and all of the Subordinated Notes shall be subordinate and subject in right of
payment to the prior payment in full of all Senior Indebtedness (as defined
below). "Senior Indebtedness" as used herein shall mean the principal of and
premium, if any, and interest on (a) all indebtedness of the Corporation for
money borrowed, other than Preferred Stock, whether outstanding as of the date
hereof or thereafter created, incurred or assumed, except indebtedness that by
the terms of the instrument or instruments by which such indebtedness was
created or incurred expressly provides that it (i) is junior in right of payment
to the Subordinated Notes or (ii) ranks PARI PASSU with the Subordinated Notes,
(b) amendments, renewals, extensions, modifications, refinancings and refundings
of any such indebtedness and (c) all of the Corporation's trade payables. For
purposes of the preceding sentence, "indebtedness for money borrowed" when used
with respect to the Corporation means: (a) all indebtedness of the Corporation
for money borrowed (including any indebtedness secured by a mortgage,
conditional sales contract or other lien which is (i) given to secure all or
part of the purchase price of property subject thereto, whether given to the
vendor of such property or to another or (ii) existing on property at the time
of acquisition thereof); (b) all indebtedness of the Corporation evidenced by
notes, debentures, bonds or other securities; (c) all lease obligations of the
Corporation which are capitalized on the books of the Corporation in accordance
with generally accepted accounting principles; (d) all indebtedness of others of
the kinds described in the preceding clause (c) assumed by or guaranteed in any
manner by the Corporation or in effect guaranteed by the Corporation through an
agreement to purchase, contingent or otherwise; and (e) all renewals, extensions
or refundings of indebtedness of the kinds described in any of the preceding
clauses (a), (b) or (d) and all renewals or extensions of lease obligations of
the kinds described in either of the preceding clauses (c) or (d).

         8.       VOTING RIGHTS.  The holders of record of shares
of the Class A Preferred Stock shall not be entitled to any voting
rights except as provided by law or otherwise specifically
provided herein.

         9. CONSENT. No consent of holders of the Class A Preferred
Stock shall be required for (a) the creation of any indebtedness of any kind of
the Corporation, (b) the creation of any class of stock of the Corporation
ranking junior as to dividends and upon liquidation to the Class A Preferred
Stock, or (c) any increase or decrease in the amount of authorized Common Stock.

         10. AMENDMENTS. The Board reserves the right by subsequent
amendment of this Certificate from time to time to decrease the number of shares
which constitute the Class A Preferred Stock (but not below the number of shares
thereof then outstanding and required for the payment of Dividends pursuant to
paragraph 2).

     FIFTH. To the full extent permitted by the DGCL or any other applicable
laws presently or hereafter in effect, no director of the Corporation shall be
personally liable to the Corporation or its stockholders for or with respect to
any acts or omissions in the performance of his or her duties as a director of
the Corporation. Any repeal or modification of this Article FIFTH shall not
adversely affect any right or protection of a director of the Corporation
existing immediately prior to such repeal or modification.

     SIXTH. Each person who is or was or had agreed to become a director or
officer of the Corporation, or each such person who is or was serving or who had
agreed to serve at the request of the Board or an officer of the Corporation as
an employee or agent of the Corporation or as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust or other entity
(including the heirs, executors, administrators or estate of such person), shall
be indemnified by the Corporation to the full extent permitted by the DGCL or
any other applicable laws as presently or hereafter in effect. Without limiting
the generality or the effect of the foregoing, the Corporation may adopt bylaws
or into one or more agreements with any person which provide for indemnification
greater or different than that provided in this Article or the DGCL. Any repeal
or modification of this Article SIXTH shall not adversely affect any right or
protection existing hereunder immediately prior to such repeal or modification.

     SEVENTH. The number of directors of the Corporation shall be five (5) until
changed by amendment to this Certificate.

     EIGHTH. In furtherance and not in limitation of the rights, powers,
privileges, and discretionary authority granted or conferred by the DGCL or
other statutes or laws of the State of Delaware, the Board is expressly
authorized to make, alter, amend or repeal the bylaws of the Corporation,
without any action on the part of the stockholders, but the stockholders may
make additional bylaws and may alter, amend or repeal any bylaw whether adopted
by them or otherwise. The Corporation may in its bylaws confer powers upon its
Board in addition to the foregoing and in addition to the powers and authorities
expressly conferred upon the Board by applicable law.

     NINTH. The Corporation reserves the right at any time and from time to time
to amend, alter, change or repeal any provision contained in this Certificate
and other provisions authorized by the laws of the State of Delaware at the time
in force may be added or inserted, in the manner now or hereafter prescribed
herein or by applicable law; and all rights, preferences and privileges of
whatsoever nature conferred upon stockholders, directors or any other persons
whomsoever by and pursuant to this Certificate in its present form or as
hereafter amended are granted subject to this reservation.

<PAGE>

                                    EXHIBIT B

                             DIRECTORS AND OFFICERS
                                       OF
                          SENTRY TECHNOLOGY CORPORATION

Sentry directors shall be:

                  Thomas A. Nicolette
                  William A. Perlmuth
                  Andrew L. Benson
                  Robert D. Furst, Jr.


Sentry's officers shall be:

                  C.E.O.Thomas A. Nicolette
                  V.P.              Andrew L. Benson
                  C.F.O.Peter J. Mundy

<PAGE>

                                    EXHIBIT C

                            FORM OF AFFILIATE LETTER


October   , 1996


Sentry Technology Corporation
[Address]
[Address]

Ladies and Gentlemen:

         I have been advised that as of the date of this letter I may be deemed
to be an "affiliate" of , a
                 corporation (the "Company"), as the term "affiliate" is (i)
defined for purposes of paragraphs (c) and (d) of Rule 145 of the rules and
regulations (the "Rules and Regulations") of the Securities and Exchange
Commission (the "Commission") under the Securities Act of 1933, as amended (the
"Securities Act"), or (ii) used in and for purposes of Accounting Series,
Releases 130 and 135, as amended, of the Commission. Pursuant to the terms of
the Agreement and Plan of Reorganization and Merger dated as of October 10, 1996
(the "Merger Agreement"), by and among Video Sentry Corporation, a Minnesota
corporation ("Video"), Knogo North America Inc., a Delaware corporation
("Knogo"), Sentry Technology Corporation, a Delaware corporation ("Sentry"),
Viking Merger Corp., a Minnesota corporation and wholly owned subsidiary of
Sentry ("Viking"), and Strip Merger Corp., a Delaware corporation and wholly
owned subsidiary of Sentry ("Strip"), Viking will be merged with and into Video
and Strip will be merged with and into Knogo (the "Merger").

         As a result of the Merger, I may receive shares of the common stock,
par value $0.001 per share, of Sentry (the "Sentry Securities") in exchange for
shares owned by me of the common stock, par value $0.01 per share, of .

         I represent, warrant and covenant to Sentry that in the event I
received any Sentry Securities as a result of the Merger:

         A.  I shall not make any sale, transfer or other
disposition of the Sentry Securities in violation of the Securities Act or
the Rules and Regulations.

         B. I have carefully read this letter and the Merger Agreement, and
discussed the requirements of such documents and other applicable limitations
upon my ability to sell, transfer or otherwise dispose of the Sentry Securities
to the extent I deemed necessary with my counsel or counsel for the Company.

         C. I have been advised that the issuance of Sentry Securities to me
pursuant to the Merger has been registered with the Commission under the
Securities Act on a Registration Statement on Form S-4. However, I have also
been advised that, since at the time the Merger was submitted for a vote of the
stockholders of the Company, I may be deemed to have been an affiliate of the
Company and the distribution by me of the Sentry Securities has not been
registered under the Securities Act, I may not sell, transfer or otherwise
dispose of the Sentry Securities issued to me in the Merger unless (i) such
sale, transfer or other disposition has been registered under the Securities
Act, (ii) such sale, transfer or other disposition is made in conformity with
Rule 145 promulgated by the Commission under the Securities Act, or (iii) in the
opinion of counsel reasonably acceptable to Sentry, or pursuant to a "no action"
letter obtained by the undersigned from the staff of the Commission, such sale,
transfer or other disposition is otherwise exempt from registration under the
Securities Act.

         D. I understand that Sentry is under no obligation to register the
sale, transfer or other disposition of the Sentry Securities by me or on my
behalf under the Securities Act or to take any other action necessary in order
to make compliance with an exemption from such registration available.

         E. I also understand that stop transfer instructions will be given to
Sentry's transfer agents with respect to the Sentry Securities and that there
will be placed on the certificates for the Sentry Securities issued to me, or
any substitutions therefor, a legend stating in substance:

         "THE SHARES REPRESENTED BY THIS CERTIFICATE WERE ISSUED IN A
         TRANSACTION TO WHICH RULE 145 PROMULGATED UNDER THE SECURITIES ACT OF
         1933 APPLIES. THE SHARES REPRESENTED BY THIS CERTIFICATE MAY ONLY BE
         TRANSFERRED IN ACCORDANCE WITH THE TERMS OF AN AGREEMENT DATED
         __________________, 1996 BETWEEN THE REGISTERED HOLDER HEREOF AND
         SENTRY TECHNOLOGY CORPORATION, A COPY OF WHICH AGREEMENT IS ON FILE AT
         THE PRINCIPAL OFFICES OF SENTRY TECHNOLOGY CORPORATION."

         F. I also understand that unless the transfer by me of my Sentry
Securities has been registered under the Securities Act or is a sale made in
conformity with the provisions of Rule 145, Sentry reserves the right to place
the following legend on the certificates issued to my transferee:

         "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933 AND WERE ACQUIRED FROM A PERSON WHO
         RECEIVED SUCH SHARES IN A TRANSACTION TO WHICH RULE 145 PROMULGATED
         UNDER THE SECURITIES ACT OF 1933 APPLIES. THE SHARES HAVE BEEN ACQUIRED
         BY THE HOLDER NOT WITH A VIEW TO, OR FOR RESALE IN CONNECTION WITH, ANY
         DISTRIBUTION THEREOF WITHIN THE MEANING OF THE SECURITIES ACT OF 1933
         AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT IN
         ACCORDANCE WITH AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
         SECURITIES ACT OF 1933."

         It is understood and agreed that the legends set forth in paragraphs E
and F above shall be removed by delivery of substitute certificates without such
legend if such legend is not required for purposes of the Securities Act or this
Agreement. It is understood and agreed that such legends and the stop orders
referred to above will be removed if (i) two years shall have elapsed from the
date the undersigned acquired the Sentry Securities received in the Merger and
the provisions of Rule 145(d)(2) are then available to the undersigned, (ii)
three years shall have elapsed from the date the undersigned acquired the Sentry
Securities received in the Merger and the provisions of Rule 145(d)(3) are then
available to the undersigned, or (iii) Sentry has received either an opinion of
counsel, which opinion and counsel shall be reasonably satisfactory to Sentry,
or a "no action" letter obtained by the undersigned from the staff of the
Commission, to the effect that the restrictions imposed by Rule 145 under the
Securities act no longer apply to the undersigned.

         Execution of this letter should not be considered an admission on my
part that I am an "affiliate" of the Company as described in the first paragraph
of this letter or as a waiver of any rights I may have to object to any claim
that I am such an affiliate on or after the date of this letter.

                                                     Very truly yours,

                                                     Name:

Accepted this      day of
October, 1996

SENTRY TECHNOLOGY CORPORATION

By:
Name:
Title:

<PAGE>



                                    EXHIBIT D

                            FURST NOTE -- TERM SHEET

     The purpose of this term sheet is to set forth the terms of a proposed loan
by Rob Furst ("Furst") to Sentry Technology Corporation ("Sentry") as described
below. This term sheet does not constitute an agreement and, if acceptable to
all parties, will constitute the basis upon which appropriate definitive
agreements will be prepared. Definitive agreements will also contain provisions
customary for the transactions contemplated herein, including covenants,
representations and warranties.

1.       PRINCIPAL AMOUNT:  $575,000.

2.       INTEREST RATE:  The greater of (i) 8.25% and (ii) the rate
         paid by Sentry to its senior lender.  Interest shall be
         paid quarterly.

3.       TERM:  Furst will agree to fund the principal amount upon
         closing (the "Closing") of the proposed merger (the
         "Merger") between Video Sentry Corporation ("Video") and
         Knogo North America Inc. ("Knogo").  The $575,000 loan will
         be evidenced by a non-negotiable promissory note (the
         "Note"), which shall mature one year from the date of
         funding.  Sentry may substitute a third-party lender to
         perform Furst's obligations in the event Furst is unable to
         perform.

4.       SENIORITY/SECURITY: The Note and underlying debt will be subordinated
         to the obligations of Sentry to its senior lender. Furst shall take the
         same security, if any, for the Note as that taken by Sentry's senior
         lender. Sentry's obligations to Furst under the Note shall be
         affirmatively senior to general unsecured creditors.

5.       CONVERSION RIGHT:  The principal amount of the Note, plus
         any accrued and unpaid interest, may, at Furst's option, be
         converted into Sentry's Common Stock at any time during the
         term of the Note at a conversion price of $6.50 per share.

6.       OTHER:  Subsequent to the signing of the agreement
         evidencing the Merger and prior to the Closing, Furst will
         advance Viking up to $250,000 on terms consistent with
         Viking's current borrowing costs.  Each such advance shall
         be approved by Viking's Board of Directors.  Strip agrees
         that the amount Furst advances Viking shall be set off
         against the principal amount to be loaned to Sentry upon
         the Closing.



                            SUPPORT/VOTING AGREEMENT

                                                     October 10, 1996

Knogo North America, Inc.
350 Wireless Blvd.
Hauppauge, New York  11788-3907


                  Re:      SUPPORT/VOTING AGREEMENT

Ladies and Gentlemen:

                  The undersigned understands that VIDEO SENTRY CORPORATION, a
Minnesota corporation ("VIDEO"), KNOGO NORTH AMERICA, INC., a Delaware
corporation ("KNOGO"), SENTRY TECHNOLOGY CORPORATION, a Delaware corporation
("SENTRY"), VIKING MERGER CORP., a Minnesota corporation and a wholly owned
subsidiary of SENTRY ("VMC"), and STRIP MERGER CORP., a Delaware corporation and
wholly owned subsidiary of SENTRY ("SMC") are entering into an Agreement and
Plan of Reorganization and Merger, dated the date hereof (the "AGREEMENT"),
providing for, among other things, the merger of VMC with and into VIDEO (the
"MERGER").

                  The undersigned is a stockholder of VIDEO (the "STOCKHOLDER")
and is entering into this letter agreement to induce you to enter into the
Agreement and to consummate the transactions contemplated thereby.

                  The Stockholder confirms its agreement with KNOGO as follows:

                  1. The Stockholder represents, warrants and agrees that
Schedule I annexed hereto sets forth the shares of the capital stock of VIDEO of
which the Stockholder or its affiliates (as defined under the Securities
Exchange Act of 1934, as amended) is the record or beneficial owner (the
"Shares") and that the Stockholder and its affiliates are on the date hereof the
lawful owners of the number of Shares set forth in Schedule I, free and clear of
all liens, charges, encumbrances, voting agreements and commitments of every
kind, except as disclosed in Schedule I. Except as set forth in Schedule I,
neither the Stockholder nor any of its affiliates own or hold any rights to
acquire any additional shares of the capital stock of VIDEO (by exercise of
stock options or otherwise) or any interest therein or any voting rights with
respect to any additional shares.

                2. The Stockholder agrees that it will not, will not permit
any company, trust or other entity controlled by the Stockholder to, and will
not permit any of its affiliates to, contract to sell, sell or otherwise
transfer or dispose of any of the Shares or any interest therein or securities
convertible thereinto or any voting rights with respect thereto, other than (i)
pursuant to the Merger, (ii) with your prior written consent or (iii) as
disclosed in Schedule I.

                  3. The Stockholder agrees to, will cause any company, trust or
other entity controlled by the Stockholder to, and will cause its affiliates to,
cooperate fully with you in connection with the Agreement and the transactions
contemplated thereby. The Stockholder agrees that it will not, will not permit
any such company, trust or other entity to, and will not permit any of its
affiliates to, directly or indirectly (including through its officers,
directors, employees or other representatives), solicit any inquiries or the
making of any proposal with respect to any recapitalization, merger,
consolidation or other business combination involving VIDEO, or the acquisition
of any capital stock or any material portion of the assets (except for
acquisitions of assets in the ordinary course of business consistent with past
practice) of VIDEO, or any combination of the foregoing (a "COMPETING
TRANSACTION"); provided, however, that nothing herein shall prevent the
Stockholder from taking any action or omitting to take any action (i) solely as
a member of the Board of Directors of VIDEO required so as not to violate such
Stockholder's fiduciary obligations as a Director as so advised by outside
counsel or (ii) if Stockholder is an officer of VIDEO, as directed by the Board
of Directors of VIDEO so long as such direction was not made in violation of any
of the terms of the Agreement.

                  4. The Stockholder agrees that all of the Shares beneficially
owned by the Stockholder or its affiliates, or over which the Stockholder or any
of its affiliates has voting power or control, directly or indirectly (including
any common shares of VIDEO acquired after the date hereof), at the record date
for any meeting of stockholders of VIDEO called to consider and vote to approve
the Merger and the Agreement and/or the transactions contemplated thereby will
be voted by the Stockholder or its affiliates in favor thereof and that neither
the Stockholder nor any of its affiliates will vote such Shares in favor of any
Competing Transaction.

                  5. The Stockholder has all necessary power and authority to
enter into this letter agreement. This agreement is the legal, valid and binding
agreement of the Stockholder, and is enforceable against the Stockholder in
accordance with its terms.

                  6. The Stockholder agrees that damages are an inadequate
remedy for the breach by Stockholder of any term or condition of this letter
agreement and that you shall be entitled to a temporary restraining order and
preliminary and permanent injunctive relief in order to enforce our agreements
herein.

                  This letter agreement may be terminated at the option of any
party at any time upon the earlier of (i) termination of the Agreement and (ii)
the Effective Time (as defined in the Agreement). Please confirm that the
foregoing correctly states the understanding between us by signing and returning
a counterpart hereof.

                                Very truly yours,


                                By:
                                  [Shareholder]


Confirmed as of the date first above written.

Knogo North America, Inc.


By:
      Name:
      Title:



                                                        Exhibit 99.1

FOR IMMEDIATE RELEASE

CONTACT: Robert Furst          or                  Thomas A. Nicolette
         Chairman, Video Sentry Corporation        CEO, KNOGO North America Inc.
         612-934-9900                              516-232-2100

                KNOGO AND VIDEO SENTRY ANNOUNCE MERGER AGREEMENT

     -Two Technological Leaders in Security Industry Join Forces to Combat
                          Commercial and Retail Theft-

NEW YORK, NY, October 10, 1996 -- KNOGO North America Inc. (AMEX:KNA), a
leading manufacturer of Electronic Article surveillance (EAS) systems,
headquartered in Long Island, NY, and Video Sentry Corporation (Nasdaq:VSEN), a
pioneer in traveling video security, headquarted in Minneapolis, MN, today
announced they have signed a definitive merger agreement which will result in a
new publicly traded entity to be called Sentry Technology Corporation (Sentry).
The parties intend to apply for listing for Sentry common and preferred stock on
the NASDAQ National Market.

     The merger between KNOGO and Video Sentry takes advantage of the extensive
knowledge and expertise both companies have in security systems. Together they
will offer a comprehensive line of security products by combining KNOGO's
patented EAS Technology and renowned customer service with Video Sentry's
patented innovative CCTV systems technology.

     Thomas A. Nicolette, president and CEO of Knogo, commented, "Since early
1995, we have been looking for a proven proprietary CCTV product line with broad
market applications that would complement our EAS product line. Video Sentry not
only has that product in Sentry Vision TM, but we strongly believe the product's
cost, performance and market presence can be greatly enhanced through the
utilization of KNOGO's R&D, engineering, production, sales, installation and
service infrastructure. In addition, Sentry will be able to offer the
marketplace a new integrated EAS/CCTV product line at a time when we believe
business opportunities to be at their greatest. We see Sentry's potential as far
exceeding what either company would have achieved on its own."

     The merger agreement provides for Sentry, a newly-formed Delaware
corporation, to issue 1 share of common stock for each 1 share of Video Sentry
common stock outstanding at the effective time of the merger. Sentry will issue
1 share of common stock and 1 share of Class A Preferred Stock for each 1.2022
shares of KNOGO common stock outstanding. As contemplated by the merger
agreement, the Sentry Class A Preferred Stock will have a face value of $5.00
per share and a dividend rate of 5.0% (the first two years of which are
paid-in-kind). The preferred will be non voting and subject to a mandatory
redemption four years from the date of issuance and optional redemption by
Sentry at any time after one year from the date of issuance. The redemption
price will be equal to $5.00 per preferred share (plus accrued and unpaid
dividends as of the redemption date) plus the amount, if any, by which the
market price of Sentry's common stock at the time of redemption exceeds $6.50
per share. The preferred stock is non convertible, but the redemption price may,
in certain circumstances, be paid in common stock at the company's option.
Following consummation of the merger, it is anticipated that there will be
approximately 9.6 million shares of Sentry common stock (51% owned by former
Video Sentry shareholders and 49% owned by former KNOGO shareholders) and 4.8
million shares of Sentry Class A Preferred Stock outstanding, all owned by
former KNOGO shareholders.

     The merger agreement also provides for Sentry's Board of Directors to
consist initially of two representatives each from Video Sentry and KNOGO, as
well as one additional director to be mutually agreed upon between the parties.
Mr. Nicolette will be the CEO of Sentry. Andrew Benson, the founder and
president of Video Sentry, will be Vice President, CCTV Products. The KNOGO and
Video Sentry boards have both unanimously approved the transaction.

     It is expected that special shareholder meetings of both companies will be
held during the late fall. Consummation of the merger is subject to approval by
the holders of a majority of the outstanding common stock of each company. It is
intended that the merger qualify as a tax-free reorganization.

     Commenting on the proposed merger, Mr. Benson said, "We are very excited
about the opportunities created by the combination of Video Sentry and KNOGO.
The resulting business entity will enjoy the benefits of a proprietary and
dynamic CCTV product line from Video Sentry, linked to the high quality
infrastructure present in KNOGO."

     Video Sentry Corporation, founded in 1990, is the industry leader in the
design, manufacture and marketing of patented traveling CCTV surveillance
systems.

     KNOGO designs, manufactures, sells and services EAS and Closed Circuit
Video equipment in the United States and Canada to deter shoplifting and other
types of theft for retailers, supermarkets, libraries and commercial
enterprises. KNOGO is a spin-off of KNOGO Corporation, founder of the EAS
industry 30 years ago.


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