Document:

THESE
      SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
      AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD OR OFFERED
      FOR
      SALE IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES
      OR
      AN OPINION OF COUNSEL OR OTHER EVIDENCE ACCEPTABLE TO THE COMPANY THAT SUCH
      REGISTRATION IS NOT REQUIRED.

    

    EXCHANGE
      AGREEMENT

    

    THIS
      EXCHANGE AGREEMENT, dated as of June __, 2006, is
      made
      by and between
      bioMETRX, Inc., a Delaware corporation (“Company”), and each purchaser
      identified on the signature pages hereto (each, including its successors and
      assigns, a “Purchaser” and collectively the “Purchasers”).

    

    WHEREAS,
      the Company recently completed a closing of a private placement offering (the
      “Offering”) pursuant to which it issued and sold to the Purchasers 65,000 shares
      of its Series A 5% Convertible Preferred Stock with a stated value of $10.00
      per
      share for an aggregate purchase price of $650,000 (“Preferred Stock”);
      and

    

    WHEREAS,
      in connection with the issuance of the Preferred Stock, the Company issued
      to
      the Purchasers an aggregate of 216,666 A Warrants (“A Warrants”) exercisable at
      $2.73 per share, and 216,666 B Warrants exercisable at $.10 per share (“B
      Warrants”), and 21,667 shares of common stock as a prepayment of the first
      year’s dividend; and

    

    WHEREAS,
      the Company has subsequently determined to amend the terms of the Offering
      so as
      to offer and sell 8% Convertible Notes (“Notes”), together with A Warrants
      exercisable at $1.75 per share and B Warrants exercisable at $.10 per share;
      and

    

    WHEREAS,
      the Company and the Purchasers wish to provide for the terms and conditions
      pursuant to which (i) the Purchasers shall exchange the 65,000 shares of
      Preferred Stock for $650,000 of 8% Convertible Notes (“Notes”), of the Company,
      (ii) the 216,666 A Warrants shall be exchanged for 650,000 new A Warrants,
      (iii)
      the Company shall issue to the Purchasers an additional 108,334 B Warrants,
      and
      (iv) the Company shall issue to the Purchasers an additional 30,333 shares
      of
      common stock.

    

    NOW,
      THEREFORE, for good and valuable consideration, the receipt and sufficiency
      of which the parties hereby acknowledge, the parties agree as
      follows:

    

    1.    Exchange
      of Preferred Stock for Notes.
      The
      Company and the Purchaser
      hereby agree that the 650,000 shares of Preferred Stock shall be exchanged
      for
      $650,000 of Notes which are convertible into common stock at a conversion price
      of $1.00 per share.

    

    2.    Exchange
      Warrants.
      The
      Company and the Purchaser hereby agree that the 216,666 A Warrants shall be
      exchanged for 650,000 new A Warrants with an exercise price of $1.75 per
      share.

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    3.    Issuance
      of Additional B Warrants.
      The
      Company shall issue an additional 108,334 B Warrants to the
      Purchasers.

    

    4.    Prepayment
      of Interest.
      The
      Company and the Purchaser hereby agree that the Company shall issue an
      additional 30,333 shares of common stock to the Purchasers as a prepayment
      of
      the first year’s interest.

    

    5.    Closing.
      At the
      Closing, the Purchaser shall deliver the Preferred Stock and the A Warrants
      to
      the Company, and the Company shall deliver the Notes, 650,000 new A Warrants,
      108,334 additional B Warrants, and 30,333 additional shares of common stock
      to
      the Purchasers.

    

    5.    Further
      Assurances.
      In
      connection with the exchange of the Preferred Stock
      and
      the A Warrant, the Purchasers, by entering into this Exchange Agreement, agree
      to execute all agreements and other documents as reasonably requested by the
      Company.

    

    6.    Company
      Representations and Warranties and Covenants.
      The
      Company represents,
      warrants and covenants to the Purchaser as follows:

    

    a.    Organization.
      The
      Company is a corporation duly organized, validly existing and in good standing
      under the laws of Delaware and has all requisite corporate power and authority
      to own its properties and carry on its business as now being conducted.

    

    b.    Capitalization.
      As of
      the date of this Agreement, the authorized capital stock of the Company consists
      of 25,000,000 shares of common stock, $.001 par value per share, 6,987,492
      shares of which are validly issued and outstanding and 10,000,000 share of
      preferred stock, $.01 par value per share, none of which are validly issued
      and
      outstanding. 

     

    c.    Authority;
      Enforceability.
      The
      Company has the requisite corporate power and authority to execute and deliver
      this Agreement and to carry out its obligations hereunder. The execution,
      delivery and performance of this Agreement and the consummation of the
      transactions contemplated hereby have been duly authorized by all necessary
      corporate action on the part of the Company and no other corporate proceedings
      on the part of the Company are necessary to authorize this Agreement or to
      consummate the transactions so contemplated. This Agreement has been duly
      executed and delivered by the Company and constitutes a valid and binding
      obligation of the Company, enforceable against the Company in accordance with
      its terms, except as (a) enforceability may be limited by applicable bankruptcy,
      insolvency, fraudulent transfer, moratorium or similar laws from time to time
      in
      effect affecting creditors’ rights generally and (b) the availability of
      equitable remedies may be limited by equitable principles of general
      applicability.

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    d.    Third
      Party Consents.
      No
      consent, authorization, order or approval of, or filing or registration with,
      any governmental authority or other person is required for the execution and
      delivery of this Agreement or the consummation by the Company of any of the
      transactions contemplated hereby.

    

    e.    Common
      Stock.
      All
      shares of the Company’s Common Stock to be issued pursuant to this Agreement
      will be, when issued, free from liens, duly authorized, validly issued, fully
      paid and non-assessable.

    

    f.    No
      Other Representations or Warranties.
      Except
      as set forth above in this Section 4, no other representations or warranties,
      express or implied, are made in this Agreement by the Company to the
      Purchaser.

    

    7.    Purchaser
      Representations and Warranties and Covenants.
      The
      Purchaser represents,
      warrants and covenants to the Company as follows:

    

    a.    Investment
      Representation.
      Purchaser acknowledges
      that the Notes are restricted securities, that Purchaser
      is
      acquiring the Notes, A Warrants and B Warrants for its own account with the
      present intention of holding the Notes, A Warrants and B Warrants for purposes
      of investment and not with a view to distribution within the meaning of the
      Securities Act of 1933, as amended and that the Notes, A Warrants and B Warrants
      will bear a legend to such effect. Purchaser has relied solely on its
      independent investigation in making the decision to purchase the Notes, A
      Warrants and B Warrants.

    

    b.    Registration
      Rights.
      The
      Purchasers shall not accept, and the Company shall not pay, any payments that
      may have been or may be required to be made by the Company to the Purchasers
      under the terms of the certain Registration Rights Agreement between the Company
      and the Purchasers, dated April 28, 2006, that arises from the failure of the
      Company to file timely, or the Securities and Exchange Commission to declare
      effective timely, any registration statement required to be filed by the Company
      for the benefit of any Purchaser. Further, simultaneously with the execution
      of
      this Agreement, the parties are entering into and executing a new Registration
      Rights Agreement pursuant to which the Company is undertaking to prepare and
      file a registration statement covering the proposed resale of the securities
      underlying the securities to be issued to the Purchasers hereunder.

    

    c.    No
      Other Representations or Warranties.
      Except
      as set forth above in this Section 4, no other representations or warranties
      of
      any kind, express or implied, are made in this Agreement by Purchaser to the
      Company.

    

    8.    Miscellaneous.

    

    a.    Survival
      of Representations, Warranties and Agreements.
      The
      representations, warranties, covenants and agreements in this Agreement or
      in
      any instrument delivered pursuant to this Agreement shall survive the Closing
      and shall not be limited or affected by any investigation by or on behalf of
      any
      party hereto.

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    b.    Further
      Assurances.
      Each of
      the Company and Purchaser will use its, as the case may be, best reasonable
      efforts to take all action and to do all things necessary, proper or advisable
      on order to consummate and make effective the transactions contemplated by
      this
      Agreement.

    

    c.    Entire
      Agreement; No Third Party Beneficiaries.
      This
      Agreement (including the documents, exhibits and instruments referred to herein)
      (a) constitutes the entire agreement and supersedes all prior agreements, and
      understandings and communications, both written and oral, among the parties
      with
      respect to the subject matter hereof, and (b) is not intended to confer upon
      any
      person other than the parties hereto any rights or remedies
      hereunder.

    

    d.    Governing
      Law.
      This
      Agreement shall be governed and construed in accordance with the laws of the
      State of New York without regard to any applicable principles of conflicts
      of
      law.

    

    e.    Counterparts.
      This
      Agreement may be executed in multiple counterparts, each of which shall be
      deemed an original and all of which taken together shall constitute one and
      the
      same document.

    

    f.    Amendment
      and Modification.
      This
      Agreement may not be amended or modified except by an instrument in writing
      signed by each of the parties hereto.

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    IN WITNESS
      WHEREOF, the parties have caused this Agreement to be duly executed by their
      respective officers thereunto duly authorized as of the day and year first
      above
      written.

     

    
      	 	 	 
	 	BIOMETRX,
              INC.
	 
 	 
 	 
 
	 	By:  	 
	 	 	
              
 
	 	 	 
	 	By:  	 
	 	
              
Name:EXHIBIT 4.1

                         UNIVERSAL DETECTION TECHNOLOGY

                           2006 CONSULTANT STOCK PLAN

                            As Adopted June 29, 2006

                                 PURPOSE OF PLAN

         WHEREAS, the purpose of this 2006 Consultant Stock Plan is to advance
the interests of the Company by helping the Company obtain and retain the
services of persons providing consulting services upon whose judgment,
initiative, efforts or services the Company is substantially dependent, by
offering to or providing those persons with incentives or inducements affording
such persons an opportunity to become owners of capital stock of the Company.

                          TERMS AND CONDITIONS OF PLAN

         1. DEFINITIONS.

         Set forth below are definitions of capitalized terms that are generally
used throughout this Plan, or references to provisions containing such
definitions (capitalized terms whose use is limited to specific provisions are
not referenced in this Section):

                  (a) Affiliate - The term "Affiliate" is defined as any person
controlling the Company, controlled by the Company, or under common control with
the Company.

                  (b) Award - The term "Award" is collectively and severally
defined as any Award Shares granted under this Plan.

                  (c) Award Shares - The term "Award Shares" is defined as
shares of Common Stock granted by the Plan Committee in accordance with Section
5 of this Plan.

                  (d) Board - The term "Board" is defined as the Board of
Directors of the Company, as such body may be reconstituted from time to time.

                  (e) Common Stock - The term "Common Stock" is defined as the
Company's common stock reserved for issuance under this Plan.

                  (f) Company - The term "Company" is defined as Universal
Detection Technology, a California corporation.

                  (g) Disposed - The term "Disposed" (or the equivalent terms
"Disposition" or "Dispose") is defined as any transfer or alienation of an Award
which would directly or indirectly change the legal or beneficial ownership
thereof, whether voluntary or by operation of law, or with or without the
payment or provision of consideration, including, by way of example and not
limitation: (i) the sale, assignment, bequest or gift of the Award; (ii) any

<PAGE>

transaction that creates or grants a right to obtain an interest in the Award;
(iii) any transaction that creates a form of joint ownership in the Award
between the Recipient and one or more other Persons; (iv) any Disposition of the
Award to a creditor of the Recipient, including the hypothecation, encumbrance
or pledge of the Award or any interest therein, or the attachment or imposition
of a lien by a creditor of the Recipient of the Award or any interest therein
which is not released within thirty (30) days after the imposition thereof; (v)
any distribution by a Recipient which is an entity to its stockholders,
partners, co-venturers or members, as the case may be, or (vi) any distribution
by a Recipient which is a fiduciary such as a trustee or custodian to its
settlors or beneficiaries.

                  (h) Eligible Person - The term "Eligible Person" means any
Person who, at a particular time, is an employee, officer, director, consultant,
independent contractor, advisor, or other service provider of the Company or any
Parent or Subsidiary of the Company; provided that such services are not in
connection with the offer and sale of securities in a capital-raising
transaction.

                  (i) Fair Market Value - The term "Fair Market Value" means the
fair market value as of the applicable valuation date of the Award Shares, or
other shares of Common Stock, as the case may be (the "Subject Shares"), to be
valued as determined by the Plan Committee in its good faith judgment, but in no
event shall the Fair Market Value be less than the par value of the Subject
Shares.

                  (j) Person - The term "Person" is defined, in its broadest
sense, as any individual, entity or fiduciary such as, by way of example and not
limitation, individual or natural persons, corporations, partnerships (limited
or general), joint-ventures, associations, limited liability
companies/partnerships, or fiduciary arrangements, such as trusts.

                  (k) Plan - The term "Plan" is defined as this 2006 Consultant
Stock Plan.

                  (l) Plan Committee - The term "Plan Committee" is defined as
that Committee appointed by the Board to administer and interpret this Plan as
more particularly described in Section 3 of the Plan; provided, however, that
the term Plan Committee will refer to the Board during such times as no Plan
Committee is appointed by the Board.

                  (m) Recipient - The term "Recipient" is defined as any
Eligible Person who, at a particular time, receives the grant of an Award.

                  (n) Securities Act - The term "Securities Act" is defined as
the Securities Act of 1933, as amended (references herein to Sections of the
Securities Act are intended to refer to Sections of the Securities Act as
enacted at the time of the adoption of this Plan by the Board and as
subsequently amended, or to any substantially similar successor provisions of
the Securities Act resulting from recodification, renumbering or otherwise).

         2. TERM OF PLAN.

                  This Plan shall be effective as of such time and date as this
Plan is adopted by the Board, and this Plan shall terminate on the first
business day prior to the ten (10) year anniversary of the date this Plan became
effective. All Awards granted pursuant to this Plan prior to the effective date
of this Plan shall not be affected by the termination of this Plan and all other
provisions of this Plan shall remain in effect until the terms of all
outstanding Awards have been satisfied or terminated in accordance with this
Plan and the terms of such Awards.

<PAGE>

         3. PLAN ADMINISTRATION.

                  (a) Plan Committee.

                           (i) The Plan shall be administered and interpreted by
a committee consisting of one (1) or more members of the Board; provided,
however, no member of the Board who may serve as a member of the Plan Committee
if such person serves or served as a member of the plan committee with respect
to any plan (other than this Plan) of the Company or its Affiliates which plan
was or is established to comply with the provisions of Rule 16b-3(c)(2)(i) to
the Securities and Exchange Act of 1934, as amended (i.e., pertaining to the
establishment of so-called "Section 16b-3 Plans"), and, by reason of such
person's proposed service as a member of the Plan Committee, such person would
not be considered a "disinterested" person within the meaning of said Rule with
respect to such other plan.

                           (ii) Members of the Plan Committee may resign at any
time by delivering written notice to the Board. Vacancies in the Plan Committee
shall be filled by the Board. The Plan Committee shall act by a majority of its
members in office. The Plan Committee may act either by vote at a meeting or by
a memorandum or other written instrument signed by a majority of the Plan
Committee.

                           (iii) If the Board, in its discretion, does not
appoint a Plan Committee, the Board itself will administer and interpret the
Plan and take such other actions as the Plan Committee is authorized to take
hereunder; provided that the Board may take such actions hereunder in the same
manner as the Board may take other actions under the Articles of Incorporation
and bylaws of the Company generally.

                  (b) Eligibility of Plan Committee Members to Receive Awards.
While serving on the Plan Committee, such members shall not be eligible for
selection as Eligible Persons to whom an Award may be granted under the Plan.

                  (c) Power to Make Awards. The Plan Committee shall have the
full and final authority in its sole discretion, at any time and from
time-to-time, subject only to the express terms, conditions and other provisions
of the Articles of Incorporation of the Company and this Plan, and the specific
limitations on such discretion set forth herein, to:

                           (i) Designate the Eligible Persons or classes of
Eligible Persons eligible to receive Awards from among the Eligible Persons;

                           (ii) Grant Awards to such selected Eligible Persons
or classes of Eligible Persons in such form and amount (subject to the terms of
the Plan) as the Plan Committee shall determine;

                           (iii) Interpret the Plan, adopt, amend and rescind
rules and regulations relating to the Plan, and make all other determinations
and take all other action necessary or advisable for the implementation and
administration of the Plan; and

                           (iiii) Delegate all or a portion of its authority
under subsections (i) and (ii) of this Section 3(c) to one or more directors of
the Company who are executive officers of the Company, subject to such
restrictions and limitations (such as the aggregate number of shares of Common
Stock that may be awarded) as the Plan Committee may decide to impose on such
delegate directors.

<PAGE>

                  In determining the recipient, form and amount of Awards, the
Plan Committee shall consider any factors deemed relevant, including the
recipient's functions, responsibilities, value of services to the Company and
past and potential contributions to the Company's profitability and sound
growth.

                  (d) Interpretation Of Plan. The Plan Committee shall, in its
sole and absolute discretion, interpret and determine the effect of all matters
and questions relating to this Plan. The interpretations and determinations of
the Plan Committee under the Plan (including without limitation determinations
pertaining to the eligibility of Persons to receive Awards, the form, amount and
timing of Awards, the methods of payment for Awards, and the other terms and
provisions of Awards and the certificates or agreements evidencing same) need
not be uniform and may be made by the Plan Committee selectively among Persons
who receive, or are eligible to receive, Awards under the Plan, whether or not
such Persons are similarly situated. All actions taken and all interpretations
and determinations made under this Plan in good faith by the Plan Committee
shall be final and binding upon the Recipient, the Company, and all other
interested Persons. No member of the Plan Committee shall be personally liable
for any action taken or decision made in good faith relating to this Plan, and
all members of the Plan Committee shall be fully protected and indemnified to
the fullest extent permitted under applicable law by the Company in respect to
any such action, determination, or interpretation.

                  (e) Compensation; Advisors. Members of the Plan Committee
shall receive such compensation for their services as members as may be
determined by the Board. All expenses and liabilities incurred by members of the
Plan Committee in connection with the administration of the Plan shall be borne
by the Company. The Plan Committee may, with the approval of the Board, employ
attorneys, consultants, accountants, appraisers, brokers, or other Persons, at
the cost of the Company. The Plan Committee, the Company and its officers and
directors shall be entitled to rely upon the advice, opinions, or valuations of
any such Persons.

         4. STOCK POOL.

                  (a) Maximum Number of Shares Authorized Under Plan. Shares of
stock which may be issued or granted under the Plan shall be authorized and
unissued or treasury shares of Common Stock. The aggregate maximum number of
shares of Common Stock which may be issued as a grant of Award Shares shall not
exceed 25,000,000 shares of Common Stock (the "Stock Pool").

                  (b) Date of Award. The date an Award is granted shall mean the
date selected by the Plan Committee as of which the Plan Committee allots a
specific number of shares to a Recipient with respect to such Award pursuant to
the Plan.

         5. AWARD SHARES.

                  (a) Grant. The Plan Committee may from time to time, and
subject to the provisions of the Plan and such other terms and conditions as the
Plan Committee may prescribe, grant to any Eligible Person one or more shares of
Common Stock ("Award Shares") allotted by the Plan Committee. The grant of Award
Shares or grant of the right to receive Award Shares shall be evidenced by
either a written consulting agreement or a separate written agreement confirming
such grant, executed by the Company and the Recipient, stating the number of
Award Shares granted and stating all terms and conditions of such grant.

                  (b) Purchase Price and Manner of Payment. The Plan Committee,
in its sole discretion, may grant Award Shares in any of the following
instances:

<PAGE>

                           (i) as a "bonus" or "reward" for services previously
rendered and compensated, in which case the recipient of the Award Shares shall
not be required to pay any consideration for such Award Shares, and the value of
such Award Shares shall be the Fair Market Value of such Award Shares on the
date of grant; or

                           (ii) as "compensation" for the previous performance
or future performance of services or attainment of goals, in which case the
recipient of the Award Shares shall not be required to pay any consideration for
such Award Shares (other than the performance of his services).

         6. ADJUSTMENTS.

                  (a) Subdivision or Stock Dividend. If (i) outstanding shares
of Common Stock shall be subdivided into a greater number of shares by reason of
recapitalization or reclassification, the number of shares of Common Stock, if
any, available for issuance in the Stock Pool shall, simultaneously with the
effectiveness of such subdivision or immediately after the record date of such
dividend, be proportionately increased, and (ii) conversely, if the outstanding
shares of Common Stock shall be combined into a smaller number of shares, the
number of shares of Common Stock, if any, available for issuance in the Stock
Pool shall, simultaneously with the effectiveness of such combination, be
proportionately increased.
                  (b) Adjustments Determined in Sole Discretion of Board. To the
extent that the foregoing adjustments relate to stock or securities of the
Company, such adjustments shall be made by the Plan Committee, whose
determination in that respect shall be final, binding and conclusive.

                  (c) No Other Rights to Recipient. Except as expressly provided
in this Section 6, (i) the Recipient shall have no rights by reason of any
subdivision or consolidation of shares of stock of any class or the payment of
any stock dividend or any other increase or decrease in the number of shares of
stock of any class, and (ii) the dissolution, liquidation, merger, consolidation
or divisive reorganization or sale of assets or stock to another corporation, or
any issue by the Company of shares of stock of any class, or securities
convertible into shares of stock of any class, shall not affect, and no
adjustment by reason thereof shall be made with respect to, the number of
shares. The grant of an Award pursuant to this Plan shall not affect in any way
the right or power of the Company to make adjustments, reclassifications,
reorganizations or changes of its capital or business structure or to merge,
consolidate, dissolve or liquidate, or to sell or transfer all or any part of
its business or assets.

         7. EMPLOYMENT STATUS.

                  In no event shall the granting of an Award be construed as
granting a continued right of employment to a Recipient if such Person is
employed by the Company, nor effect any right which the Company may have to
terminate the employment of such Person, at any time, with or without cause,
except to the extent that such Person and the Company have agreed otherwise in
writing.

         8. AMENDMENT AND DISCONTINUATION OF PLAN; MODIFICATION OF AWARDS.

                  (b) Amendment, Modification or Termination of Plan. The Board
may amend the Plan or suspend or discontinue the Plan at any time or from
time-to-time; provided, however no such action may adversely alter or impair any
Award previously granted under this Plan without the consent of each Recipient
affected thereby.

<PAGE>

                  (b) Compliance with Laws. The Plan Committee may at any time
or from time-to-time, without receiving further consideration from any Person
who may become entitled to receive or who has received the grant of an Award
hereunder, modify or amend Awards granted under this Plan as required to: (i)
comply with changes in securities, tax or other laws or rules, regulations or
regulatory interpretations thereof applicable to this Plan or Awards thereunder
or to comply with stock exchange rules or requirements.

                                    * * * * *

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