2AIL4-PC304A3-mode single keyboard

Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. NOTE: 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. FCC Statement: 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. RF exposure compliance statement: This device has been evaluated to meet the general RF exposure requirement

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, China Product Name: 3-mode single keyboard Model Number(s): PC304A 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. Date: Oct. 19, 2020Signature: Name: Derric Bai Title: manager Company: VTIN TECHNOLOGY Co.,Limited

VTIN TECHNOLOGY Co.,Limited Date: Oct. 19, 2020 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject; Request for Confidentiality FCC ID: 2AIL4-PC304A 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 In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. 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

SIZE:70*30mm 3-M ODE SINGLE KEYBOARD M ODEL No.: PC304A S/N:XXX FCC ID: 2AIL4-PC304A M ADE IN CHINA

ANTENNA

RF Exposure Evaluation Test report On Behalf of VTIN TECHNOLOGY Co.,Limited For 3-mode single keyboard Model No.: PC304A FCC ID: 2AIL4-PC304A Prepared for : VTIN TECHNOLOGY Co.,Limited UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI, Hong Kong, China Prepared By : Shenzhen HUAK Testing Technology Co., Ltd. 1F, B2 Building, JunfengZhongchengZhizao Innovation Park, Fuhai Street, Bao'an District, Shenzhen City, China Date of Te st: Sep. 16, 2020 ~ Oct. 13, 2020 Date of Re port: Oct. 13, 2020 1 General Description of EUT Product Name 3-mode single keyboard Model/Type reference PC304A Trade Mark VICTSING FCC ID 2AIL4-PC304A Hardware Version VER 2.0 Software Version V1.8 2.4GHz Operation frequency 2403MHz—2480MHz Channel number 16 Modulation Technology GFSK BLE Operation frequency: 2402MHz ~ 2480MHz Channel separation: 2MHz Channel number: 40 Modulation Technology: GFSK EDR Version: Supported EDR Modulation: GFSK, π/4DQPSK, 8DPSK Operation frequency: 2402MHz~2480MHz Channel number: 79CH Channel separation: 1MHz Antenna type: PCB Antenna Antenna gain: 1.8dBi Power supply: DC 3.7V from battery 2 RF Exposure ComplianceRequirement 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, Wheref(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearsetmW and mm before calcution The results is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mmand for transmission frequencies between 100 MHz and 6 GHz. When the minimum testseparationdistance is < 5 mm, a distance of 5 mm is applied to determine SAR testexclusion 3 EUT RFExposure Antenna Gain: 1.8dBi Define the minimum distance: 5mm GFSK(2.4GHz) Channel Maximum Peak Conducted Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power Calculated value Exclusion threshold (dBm) (mW) Lowest (2403MHz) 5.06 6±1 7 5.012 1.554 3.0 Middle (2441MHz) 5.516 6±1 7 5.012 1.566 Highest (2480MHz) 6.418 6±1 7 5.012 1.579 Conclusion: the calculated value ≤3.0, SAR is exempted. Note: For maximum peak conducted output power, please refer to test report HK2009222669-1E GFSK(BLE) Channel Maximum Peak Conducted Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power Calculated value Exclusion threshold (dBm) (mW) Lowest (2402MHz) -2.979 -3±1 -2 0.631 0.196 3.0 Middle (2440MHz) -2.954 -3±1 -2 0.631 0.197 Highest (2480MHz) -2.098 -3±1 -2 0.631 0.199 Conclusion: the calculated value ≤3.0, SAR is exempted. Note: For maximum peak conducted output power, please refer to test report HK2009222669-2E EDR DH5 Channel Maximum Peak Conducted Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power Calculated value Exclusion threshold (dBm) (mW) Lowest (2402MHz) 3.978 4±1 5 3.162 0.980 3.0 Middle (2441MHz) 3.536 4±1 5 3.162 0.988 Highest (2480MHz) 3.302 4±1 5 3.162 0.996 2DH5 Lowest (2402MHz) 3.642 4±1 5 3.162 0.980 3.0 Middle (2441MHz) 3.212 4±1 5 3.162 0.988 Highest (2480MHz) 3.047 4±1 5 3.162 0.996 3DH5 Lowest (2402MHz) 4.03 4±1 5 3.162 0.980 3.0 Middle (2441MHz) 3.654 4±1 5 3.162 0.988 Highest (2480MHz) 3.511 4±1 5 3.162 0.996 Conclusion: the calculated value ≤3.0, SAR is exempted. Note: For maximum peak conducted output power, please refer to test report HK2009222669-3E

Page 1 of 55 Report No.: HK2009222669-3E Prepared for : VTIN TECHNOLOGY Co.,Limited UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI, Hong Kong, China 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: Sep. 16, 2020 ~ Oct. 13, 2020 Date of Report: Oct. 13, 2020 Report Number: HK2009222669-3E TEST REPORT FCC PART 15 SUBPART C 15.247 Test report On Behalf of VTIN TECHNOLOGY Co.,Limited For 3-mode single keyboard Model No.: PC304A FCC ID: 2AIL4-PC304A Page 2 of 55 Report No.: HK2009222669-3E TEST RESULT CERTIFICATION Applicant’s name .................. : VTIN TECHNOLOGY Co.,Limited Address ................................... : UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI, Hong Kong, China Manufacture's Name............. : VTIN TECHNOLOGY Co.,Limited Address ................................... : UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI, Hong Kong, China Product description Trade Mark .............................. : VICTSING Product name.......................... : 3-mode single keyboard Model and/or type reference . : PC304A Standards............................... : 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 ............ : Sep. 16, 2020 ~ Oct. 13, 2020 Date of Issue .......................................... : Oct. 13, 2020 Test Result ............................................. : Pass Prepared by: Project Engineer Reviewed by: Project Supervisor Approved by: Technical Director Page 3 of 55 Report No.: HK2009222669-3E Table of Contents Page 1. SUMMA RY ........................................................................................................................................................................................... 4 1.1. TEST STANDARDS....................................................................................................................................................................... 4 1.2. TEST DESCRIPTION.......................................................................................................................................................................... 4 1.3. TEST FACILITY ................................................................................................................................................................................. 5 1.4. STATEMEN T OF THE MEASUREMENT UNCERTAINTY............................................................................................................................ 5 2. GENERAL INFORMATION .................................................................................................................................................................. 6 2.1. ENVIRONMENTAL CONDITIONS ........................................................................................................................................................ 6 2.2. GENERAL DESCRIPTION OF EUT ...................................................................................................................................................... 6 2.3. DESCRIPTION OF TEST MODES AND TEST FREQUENCY ...................................................................................................................... 7 2.4. EQUIPMENTS USED DURING THE TEST ............................................................................................................................................. 7 2.5. RELATED SUBMITTAL(S) / GRANT (S) ............................................................................................................................................... 9 2.6. MODIFICATIONS ............................................................................................................................................................................. 9 2.7. DESCRIPTION OF TES T S ETUP .................................................................................................................................................. 9 2.8. DESCRIPTION OF SUPPORT UNITS .................................................................................................................................................... 9 3. TEST CONDITIONS AND RESULTS ..................................................................................................................................................10 3.1. CONDUCTED EMISSIONS TEST .......................................................................................................................................................10 3.2. RADIATED EMISSIONS AND BAND EDGE .........................................................................................................................................12 3.3. MAXIMUM PEAK CONDUCTED OUTPUT POWER ............................................................................................................................23 3.4. 20DB BANDWIDTH.......................................................................................................................................................................27 3.5. FREQUENCY SEPARATION ..............................................................................................................................................................31 3.6. NUMBER OF HOPPING FREQUENCY ................................................................................................................................................33 3.…

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30MHz-1000MHz Above 1000MHz