2AIL4-PC289AWireless Keyboard and Dongle

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: --Reorient or relocate the receiving antenna. --Increase the separation between the equipment and receiver. --Connect the equipment into an outlet on a circuit different. from that to which the receiver is connected. --Consult the dealer or an experienced radio/TV technician for help.

VTIN TECHNOLOGY Co., Limited Agent Authorization Company: VTIN TECHNOLOGY Co., Limited Address: UNIT D 16/F ONE CAPITAL PLACE 21, LUARD ROAD WAN CHAI, Hong Kong Product Name: Wireless Keyboard and Dongle Model Number(s ): PC289A Product Description: Wireless Keyboard and Dongle We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: Jan. 15, 2021 Name: Derric Bai Title: Manager Company: VTIN TECHNOLOGY Co., Limited

VTIN TECHNOLOGY Co., Limited Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Jan. 15, 2021 Subject; Request for Confidentiality FCC ID: 2AIL4-PC289A To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Derric Bai Title: Manager

Annex A External Photos Report No.: HK2008032353-E Page 1 of 3 Report No.: HK2008032353-E Page 2 of 3 Report No.: HK2008032353-E Page 3 of 3

FCC ID LABEL: Ca. 5mm x 10mm Include in manual: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Label Location FCC ID: 2AIL4-PC289A

Annex B Internal Photos Report No.: HK2008032353-E Page 1 of 3 Report No.: HK2008032353-E Page 2 of 3 Antenna Report No.: HK2008032353-E Page 3 of 3

FCC RF Exposure EUT Description: Wireless Keyboard and Dongle Model No.: PC289A FCC ID: 2AIL4-PC289A 1. Limits According to KDB 447498 D01 General RF Exposure Guidance v06 The 1‐g and 10‐g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤50 mm are determined by: [(max power of channel, including tune‐up tolerance, mW)/(min. test separation distance, mm)]·[√ f(GHz)]≤3.0 for 1‐g SAR and ≤ 7.5 for 10‐g extremity SAR, Where: Result=P/D*√F F= the RF channel transmit frequency in GHz P=Maximum turn‐up power in mw D=Min. test separation distance in mm 2. Test Result of RF Exposure Evaluation BT Frequency (MHz) Output power （dBm） Tune Up Power （dBm） Max Tune Up power dBm/mW Min test separati on distance mm Result Limit (mW/cm 2 ) S A R Te s t Exclusion BT: 2474 -10.519 -10±1 -9 /0.13 5 0.041 3.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2008032353-E, antenna gain=-0.61dBi Per KDB 447498 D01, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine RF Exposure test exclusion. The test exclusion threshold is 0.041 which is<= 3, RF Exposure testing is not required. Note: Exclusion Thresholds Results=[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f (GHz)] f(GHz) is the RF channel transmit frequency in GHz Distance=5mm

Page 1 of 44 Report No.: HK2008032353-E TEST REPORT FCC PART 15 SUBPART C 15.247 Test report On Behalf of VTIN TECHNOLOGY Co., Limited For Wireless Keyboard and Dongle Model No.: PC289A FCC ID: 2AIL4-PC289A Prepared for : VTIN TECHNOLOGY Co., Limited UNIT D, 16/F, ONE CAPITAL PLACE, 21 LUARD ROAD, WAN CHAI, HK Prepared By : Shenzhen HUAK Testing Technology Co., Ltd. 1F, B2 Building, Junfeng Zhongcheng Zhizao Innovation Park, Fuhai Street, Bao'an District, Shenzhen City, China Date of Test: Aug. 05, 2020 ~ Jan. 15, 2021 Date of Report: Jan. 15, 2021 Report Number: HK2008032353-E Page 2 of 44 Report No.: HK2008032353-E TEST RESULT CERTIFICATION Applicant’s name .................... : VTIN TECHNOLOGY Co., Limited Address .................................... : UNIT D, 16/F, ONE CAPITAL PLACE, 21 LUARD ROAD, WAN CHAI, HK Manufacture's Name ............... : VTIN TECHNOLOGY Co., Limited Address .................................... : UNIT D, 16/F, ONE CAPITAL PLACE, 21 LUARD ROAD, WAN CHAI, HK Product description Trade Mark: Victsing Product name ............................. : Wireless Keyboard and Dongle Model and/or type reference ... : PC289A Standards ................................ : 47 CFR FCC Part 15 Subpart C 15.247 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................................... : Date (s) of performance of tests ................ : Aug. 05, 2020 ~ Jan. 15, 2021 Date of Issue ............................................. : Jan. 15, 2021 Test Result ................................................. : Pass Prepared by: Project Engineer Reviewed by: Project Supervisor Approved by: Technical Director Page 3 of 44 Report No.: HK2008032353-E Contents Page CONTENTS .............................................................................................................................................................. 3 1 TEST SUMMARY ............................................................................................................................................ 6 1.1 TEST DESCRIPTION ...................................................................................................................................... 6 1.2 MEASUREMENT UNCERTAINTY ...................................................................................................................... 7 2 TEST FACILITY ............................................................................................................................................... 8 3 GENERAL INFORMATION ............................................................................................................................. 8 3.1 GENERAL DESCRIPTION OF EUT .................................................................................................................. 8 3.2 DESCRIPTION OF TEST CONDITIONS ............................................................................................................ 10 3.3 DESCRIPTION OF TEST SETUP ........................................................................................................... 10 4 EQUIPMENTS LIST FOR ALL TEST ITEMS ............................................................................................... 11 5 TEST RESULT .............................................................................................................................................. 13 5.1 ANTENNA REQUIREMENT ............................................................................................................................ 13 5.1.1 Standard requirement ...................................................................................................................... 13 5.1.2 EUT Antenna ................................................................................................................................... 13 5.2 CONDUCTION EMISSIONS MEASUREMENT ................................................................................................... 14 5.2.1 Applied procedures / Limit ............................................................................................................... 14 5.2.2 Test procedure ................................................................................................................................. 14 5.2.3 Test setup ........................................................................................................................................ 15 5.2.4 Test results ...................................................................................................................................... 16 5.3 RADIATED EMISSIONS MEASUREMENT ........................................................................................................ 18 5.3.1 Applied procedures / Limit ............................................................................................................... 18 5.3.2 Test setup ........................................................................................................................................ 18 5.3.3 Test Result ....................................................................................................................................... 20 5.4 MAXIMUM OUTPUT POWER MEASUREMENT ................................................................................................. 27 5.4.1 Limit ................................................................................................................................................. 27 5.4.2 Test procedure ........................................................................................…

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Test Model：PC289A Radiated Emission