Exhibit 4.1

	 	 
	NUMBER	UNITS
	U-	 


 


SEE REVERSE FOR CERTAIN DEFINITIONS


 


CUSIP [·]


 


APX ACQUISITION CORP. I


 


UNITS CONSISTING OF ONE CLASS A ORDINARY SHARE
AND ONE-HALF OF ONE REDEEMABLE WARRANT,


 


EACH WHOLE WARRANT ENTITLING THE HOLDER TO PURCHASE
ONE CLASS A ORDINARY SHARE


 


THIS CERTIFIES THAT            is
the owner of               Units of APx Acquisition Corp. I, a Cayman
Islands exempted company (the “Company”), transferrable on the books of the Company in person or by duly authorized
attorney upon surrender of this certificate properly endorsed.


 


Each Unit (“Unit”)
consists of one (1) Class A ordinary share of the Company, par value $0.0001 per share (“Ordinary Share”), and
one-half of one redeemable warrant (each whole warrant, a “Warrant”). Each Warrant entitles the holder to purchase
one Ordinary Share (subject to adjustment) for $11.50 per share (subject to adjustment). Only whole Warrants are exercisable. Each Warrant
will become exercisable on the later of (i) thirty (30) days after the Company’s completion of a merger, share exchange, asset acquisition,
share purchase, reorganization or other similar business combination with one or more businesses (each a    “Business Combination”),
and (ii) twelve (12) months from the closing of the Company’s initial public offering, and will expire unless exercised before 5:00
p.m., New York City Time, on the date that is five (5) years after the date on which the Company completes its initial Business Combination,
or earlier upon redemption or liquidation. The Ordinary Shares and Warrants comprising the Units represented by this certificate are not
transferable separately prior to , 2021, unless BofA Securities, Inc. elects to allow separate trading earlier, subject to the Company’s
filing of a Current Report on Form 8-K with the Securities and Exchange Commission containing an audited balance sheet reflecting the
Company’s receipt of the gross proceeds of the Company’s initial public offering and issuing a press release announcing when
separate trading will begin. No fractional Warrants will be issued upon separation of the Units. The terms of the Warrants are governed
by a Warrant Agreement, dated as of        , 2021 (the “Warrant Agreement”), 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 1 State Street, 30th Floor, New York, New York 10004, 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 registered by the Registrar of the Company.


 


This certificate shall be governed by
and construed in accordance with the laws of the State of New York.


 


Witness the facsimile signature
of a duly authorized signatory of the Company.


 


	 	 
	 	Authorized Signatory


	 	 
	 	Transfer Agent




     


     


    

APx Acquisition Corp. I


 


The Company will furnish without
charge to each unitholder who so requests, a statement of the powers, designations, preferences and relative, participating, optional
or other special rights of each class of equity 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 ___________
	 	 	 	 	 	 	      (Cust)                               (Minor)
	TEN ENT	—	as tenants by the entireties	 	 	 	 
	 	 	 	 	 	 	Under Uniform Gifts to Minors Act
	JT TEN	—	as joint tenants with right of survivorship and not as tenants in common	 	 	 	
    _____________________________

    

    (State)

     



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


 


For value received,             
hereby sell, assign and transfer unto


 


(PLEASE 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) MUST 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 UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED (OR ANY SUCCESSOR RULE)).	 




     


     


    

As more fully described in,
and subject to the terms and conditions described in, the Company’s final prospectus for its initial public offering dated            
the holder(s) of this certificate shall be entitled to receive a pro-rata portion of certain funds held in the trust account established
in connection with the Company’s initial public offering in the event that (i) the Company redeems the Ordinary Shares sold in its
initial public offering and liquidates because it does not consummate an initial Business Combination within the time period set forth
in the Company’s Amended and Restated Memorandum and Articles of Association, as the same may be amended from time to time, or (ii)
if the holder(s) properly redeem for cash his, her or its respective Ordinary Shares included in the Units represented by this certificate
in connection with (x) a tender offer (or proxy solicitation, solely in the event the Company seeks shareholder approval of the proposed
initial Business Combination) setting forth the details of a proposed initial Business Combination or (y) a shareholder vote to amend
the Company’s Amended and Restated Memorandum and Articles of Association (A) to modify the substance or timing of the Company’s
obligation to allow redemption in connection with our initial business combination or to redeem 100% of the Ordinary Shares if it does
not consummate an initial Business Combination within the time set forth in the Company’s Amended and Restated Memorandum and Articles
of Association or (B) with respect to any other material provisions relating to shareholders’ rights or pre-initial Business Combination
activity, as the same may be amended from time to time. In no other circumstances shall the holder(s) have any right or interest of any
kind in or to the trust account.