2AIL4-PC321A2.4 GHz multimedia Wireless Keyboard

hereby declare that the product: 2.4Ghz multimedia We, ACE 21 LUARD ROAD WAN CHAI HongKong VTIN TECHNOLOGY Co., Limited Add: UNIT D 16/F ONE CAPITAL PL Tel: 0755-26008484 Fax: 0755-26008484 Email: [email protected] DECLARATION OF SIMILARITY Date : 2021-1-7 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir or Madam: Wireless keyboard, FCC ID: 2AIL4-PC321A. Model: PC321BPC321C is electrically identical with the model: PC321A which was tested by BACL with the same electromagnetic emissions and electromagnetic compatibility characteristics. A description of the differences between those models and that are declared similar are as follows: They are the same product, and just the different model name, the rest are the same. Please contact me should there be need for any additional clarification or information. Best Regards, Signature: Printed Name: Derric Bai Title: Manager , VTIN TECHNOLOGY Co., Limited

QA-FR-170-B VTIN TECHNOLOGY Co., Limited Add: UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI HongKong Tel: 0755-26008484 Fax: 0755-26008484 Email: [email protected] FCC Authorization Date: 2021-1-7 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We , VTIN TECHNOLOGY Co., Limited Hereby authorizes Bay Area Compliance Laboratories Corporation to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratory Corporation on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Client’s signature Printed Name: Derric Bai Title: Manager

QA-FR-172-A VTIN TECHNOLOGY Co., Limited Add: UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI HongKong Tel: 0755-26008484 Fax: 0755-26008484 Email: [email protected] FCC Confidential Authorization Date: 2021-1-7 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2AIL4-PC321A In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, VTIN TECHNOLOGY Co., Limited hereby requests long-term confidential treatment of information accompanying this application as outlined below: Block Diagram Schematics Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Signature: Printed Name: Derric Bai Title: Manager

EXHIBIT B - EUT EXTERNAL PHOTOGRAPHS

2.4Ghz multimedia Wireless keyboard

EXHIBIT C - EUT INTERNAL PHOTOGRAPHS Chip ANT

FCC PART 15.249 TEST REPORT For VTIN TECHNOLOGY Co., Limited UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI Hong Kong FCC ID: 2AIL4-PC321A Report Type: Original Report Product Type: 2.4Ghz multimedia Wireless keyboard Re port Number: RDG201211800-00A Report Date: 2020-12-31 Reviewed By: Ivan Cao Assistant Manager Test Laboratory: Bay Area Compliance Laboratories Corp. (Dongguan) No.12, Pulong East 1 st Road, Tangxia Town, Dongguan, Guangdong, China Tel: +86-769-86858888 Fax: +86-769-86858891 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG201211800-00A Page 2 of 18 TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 3 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 3 OBJECTIVE ................................................................................................................................................................... 3 RELATED SUBMITTAL(S)/GRANT(S) ............................................................................................................................. 3 TEST METHODOLOGY .................................................................................................................................................. 3 MEASUREMENT UNCERTAINTY .................................................................................................................................... 4 TEST FACILITY ............................................................................................................................................................. 4 DECLARATIONS ............................................................................................................................................................ 4 SYSTEM TEST CONFIGURATION .......................................................................................................................... 5 JUSTIFICATION ............................................................................................................................................................. 5 EUT EXERCISE SOFTWARE .......................................................................................................................................... 5 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 5 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 5 SUMMARY OF TEST RESULTS ............................................................................................................................... 6 FCC§15.203 - ANTENNA REQUIREMENT .............................................................................................................. 7 APPLICABLE STANDARD .............................................................................................................................................. 7 ANTENNA CONNECTOR CONSTRUCTION ...................................................................................................................... 7 FCC§15.205, §15.209&§15.249- RADIATED EMISSIONS ...................................................................................... 8 APPLICABLE STANDARD .............................................................................................................................................. 8 EUT SETUP .................................................................................................................................................................. 8 TEST EQUIPMENT SETUP .............................................................................................................................................. 9 TEST PROCEDURE ........................................................................................................................................................ 9 CORRECTED AMPLITUDE & MARGIN CALCULATION ................................................................................................. 10 TEST EQUIPMENT LIST AND DETAILS ......................................................................................................................... 10 TEST DATA ................................................................................................................................................................ 11 FCC §15.215(C) – 20 DB BANDWIDTH TESTING ................................................................................................ 16 APPLICABLE STANDARD ............................................................................................................................................ 16 TEST PROCEDURE ...................................................................................................................................................... 16 TEST EQUIPMENT LIST AND DETAILS ......................................................................................................................... 16 TEST DATA ................................................................................................................................................................ 16 Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG201211800-00A Page 3 of 18 GENERAL INFORMATION Product Description for Equipment under Test (EUT) EUT Name: 2.4Ghz multimedia Wireless keyboard EUT Model: PC321A Multiple Model: PC321B, PC321C Operation Frequency: 2408.5-2474.5 MHz Modulation Type: GFSK Antenna Gain ▲ : 0dBi Rated Input Voltage: DC 1.5V from battery Serial Number: RDG201211800-RF-S1 EUT Received Date: 2020.12.11 EUT Received Status: Good The series product, models PC321A, PC321B,PC321C are electrically identical…

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EXHIBIT D - TEST SETUP PHOTOGRAPHS Radiated Emission Below 1GHz front View Radiated Emission Above 1GHz front View