Document:

Unassociated Document

    [SPECIMEN
      UNIT CERTIFICATE]

    

    
      	
              NUMBER

            	 
	
              U-_________

            	
              ____________UNITS

            
	 	 

    

    ADVANCED
      TECHNOLOGY ACQUISITION CORP.

    Incorporated
      under the Laws of the State of Delaware

     

    
      
        	
                 

              	
                CUSIP
                  [______] 

              
	
              	
                SEE
                  REVERSE FOR

              
	 	
                CERTAIN
                  DEFINITIONS 

              

      

    

     

    

    UNITS
      CONSISTING OF ONE SHARE OF COMMON STOCK AND ONE WARRANT TO PURCHASE ONE SHARE
      OF
      COMMON STOCK

    

    
      	
              THIS
                CERTIFIES THAT 

              
                

              

               

            
	 	 
	
              is
                the owner of 

              
                

              

               

            	
              Unit(s).

            

    

    

    

    Each
      Unit
      (“Unit”) consists of one (1) share of common stock, par value $.0001 per share
      (“Common Stock”), of Advanced
      Technology Acquisition Corp., a Delaware corporation (the “Company”), and one
      warrant (the “Warrant”). Each Warrant entitles the holder to purchase one (1)
      share of Common Stock for $6.00 per share (subject to adjustment). Each Warrant
      will become exercisable on the later of (i) the Company’s completion
      of a
      merger, capital stock exchange, asset acquisition, stock purchase or other
      similar business combination or (ii) ___________, 2007, and will expire unless
      exercised before 5:00 p.m., New York City Time, on ____________, 2010, or
      earlier upon redemption (the “Expiration Date”). The Common Stock and Warrants
      comprising the Units represented by this certificate shall commence separate
      trading as promptly as practicable following the consummation of the Company’s
      initial public offering, but in no event later than 65 days following the
      consummation of the Company’s initial public offering. The terms of the Warrants
      are governed by a Warrant Agreement, dated as of _______, 2006, between the
      Company and Continental Stock Transfer & Trust Company, as Warrant Agent,
      and are subject to the terms and provisions contained therein, all of which
      terms and provisions the holder of this certificate consents to by acceptance
      hereof. Copies of the Warrant Agreement are on file at the office of the Warrant
      Agent at ___________________,
      ___________________,
      and are available to any Warrant holder on written request and without cost.
      This certificate is not valid unless countersigned by the Transfer Agent and
      Registrar of the Company. 

     

    WITNESS
      the facsimile seal of the Company and the facsimile signatures of its duly
      authorized officers. 

    

    Dated:

    

    

      
        	
                COUNTERSIGNED
                  AND REGISTERED:

              	 
	
                CONTINENTAL
                  STOCK TRANSFER & TRUST COMPANY

              	
                CHAIRMAN
                  OF THE BOARD

              
	
                (New
                  York, NY)

              	 

      

    

     

     

    
      	AS TRANSFER AGENT AND REGISTRAR 	 	 	 
	BY: 	 	 	 
	
              
                

              

              AUTHORIZED
                OFFICER

            	 	 	
              SECRETARY

            
	 	 	 	 

    

     

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    ADVANCED
      TECHNOLOGY ACQUISITION CORP.

     

    The
      Company will furnish without charge to each stockholder who so requests, a
      statement of the powers, designations, preferences and relative, participating,
      optional or other special rights of each class of stock or series thereof of
      the
      Company and the qualifications, limitations, or restrictions of such preferences
      and/or rights. 

     

    The
      following abbreviations, when used in the inscription on the face of this
      certificate, shall be construed as though they were written out in full
      according to applicable laws or regulations:

     

    
      
        	TEN COM - as tenants in
                common 	 	UNIF GIFT MIN ACT - _____ Custodian
                _______ 
	TEN ENT - as tenants by the
                entireties 	 	
                (Cust)             
                  (Minor) 

              
	JT TEN - as joint tenants with right
                of
                survivorship and not as tenants in common 	 	
                under
                  Uniform Gifts to Minors Act
                  ____________ 

              
	 	 	
                (State) 

              

      

    

     

    Additional Abbreviations may also be used though not in
      the
      above list.

     

    For
      value
      received, ___________________________hereby sell, assign and transfer
      unto:

     

    ___________________________________________________________________

    (PLEASE
      ALSO INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF
      ASSIGNEE)

    

    ___________________________________________________________________
      

    

    ___________________________________________________________________

    (PLEASE
      PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

    

    __________________________Units
      represented by the within Certificate, and do hereby irrevocably constitute
      and
      appoint______________________________ Attorney, to transfer the said Units
      on
      the books of the within named Company with full power of substitution in the
      premises. 

    

    Dated
      ________________  ______________________________________

    NOTICE: The
      signature to this assignment must correspond with the name as written upon
      the
      face of the certificate
      in every particular, without alteration or enlargement or any change whatever.
      

    

    Signature(s)
      Guaranteed: __________________________

    THE
      SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS,
      STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP
      IN
      AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE
      17Ad-15).Unassociated Document

    [SPECIMEN
      COMMON STOCK CERTIFICATE]

    
      	
              NUMBER

            	
              ____________SHARES

            
	
              C
                -_________

            	 

    

    

    ADVANCED
      TECHNOLOGY ACQUISITION CORP.

    Incorporated
      under the Laws of the State of Delaware

    

    

    
      	
              COMMON
                STOCK

            	
              CUSIP
                [_________]

            
	
               

            	
              SEE
                REVERSE FOR

            
	 	
              CERTAIN
                DEFINITIONS

            

    

    

    

    This
      certifies that ___________________________________ is the owner
      of_____________________________

    

    FULLY
      PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $.0001 EACH OF THE COMMON
      STOCK OF 

    ADVANCED
      TECHNOLOGY ACQUISITION CORP.

    

    transferable
      on the books of the Corporation in person or by duly authorized attorney upon
      surrender of this certificate properly endorsed. This certificate is not valid
      unless countersigned by the Transfer Agent and registered by the
      Registrar.

     

    Witness
      the facsimile seal of the Corporation and the facsimile signatures of its duly
      authorized officers. 

    
 

    Dated:____________________

    
      	 	 	 	 
	 	 	 	 
	
              CHAIRMAN
                OF THE BOARD 

            	 	 	
              COUNTERSIGNED
                AND REGISTERED: 

            
	 	 	 	 
	 	 	 	
              CONTINENTAL
                STOCK TRANSFER & TRUST COMPANY 

            
	 	 	 	
              (New
                York, NY) 

            
	 	 	 	
              AS
                TRANSFER AGENT AND REGISTRAR 

            
	 	 	 	 
	
              SECRETARY 

            	 	 	 
	 	 	 	 
	 	 	 	
              By:

            
	
            	 	 	
            
	 	 	 	
              AUTHORIZED
                OFFICER

            

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    ADVANCED
      TECHNOLOGY ACQUISITION CORP.

    The
      Corporation will furnish without charge to each stockholder who so requests
      the
      powers, designations, preferences and relative, participating, optional or
      other
      special rights of each class of stock or series thereof of the Corporation
      and
      the qualifications, limitations, or restrictions of such preferences and/or
      rights. This certificate and the shares represented thereby are issued and
      shall
      be held subject to all the provisions of the Certificate of Incorporation and
      all amendments thereto and resolutions of the Board of Directors providing
      for
      the issue of shares of Preferred Stock (copies of which may be obtained from
      the
      secretary of the Corporation), to all of which the holder of this certificate
      by
      acceptance hereof assents. 

    The
      following abbreviations, when used in the inscription on the face of this
      certificate, shall be construed as though they were written out in full
      according to applicable laws or regulations:

     

    
      
        	TEN COM - as tenants in
                common 	 	UNIF GIFT MIN ACT - _____ Custodian
                _______ 
	TEN ENT - as tenants by the
                entireties 	 	
                (Cust)             
                  (Minor) 

              
	JT TEN - as joint tenants with right
                of
                survivorship and not as tenants in common 	 	
                under
                  Uniform Gifts to Minors Act
                  ____________ 

              
	 	 	
                (State) 

              

      

    

    Additional
      Abbreviations may also be used though not in the above list. 

    

    For
      value
      received, ___________________________hereby sell, assign and transfer
      unto:

     

    ___________________________________________________________________

    (PLEASE
      ALSO INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF
      ASSIGNEE)

    

    ___________________________________________________________________
      

    

    ___________________________________________________________________

    (PLEASE
      PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

    

    __________________________Shares
      represented by the within Certificate, and do hereby irrevocably constitute
      and
      appoint ______________________________ Attorney, to transfer the said Shares
      on
      the books of the within named Company with full power of substitution in the
      premises. 

    

    Dated
      ________________   ______________________________________

    NOTICE: The
      signature to this assignment must correspond with the name as written upon
      the
      face of the certificate
      in every particular, without alteration or enlargement or any change whatever.
      

    

    Signature(s)
      Guaranteed: __________________________

    THE
      SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS,
      STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP
      IN
      AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE
      17Ad-15). 

    

    The
      holder of this certificate shall be entitled to receive funds from the trust
      fund only in the event of the Company's liquidation upon failure to consummate
      a
      business combination or if the holder seeks to convert his respective shares
      into cash upon a business combination which he voted against and which is
      actually completed by the Company. In no other circumstances shall the holder
      have any right or interest of any kind in or to the trust fund.

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