2AIL4-BH438ABluetooth FM Transmitter

VTIN TECHNOLOGY Co., Limited Sep.09, 2020 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject: Explanation of differences between product types FCC ID : 2AIL4-BH438A Model Number: BH438A, BH438B, BH438C To Whom It May Concern: We, The VTIN TECHNOLOGY Co., Limited hereby declare that the model : BH438B, BH438C is identical with the model : BH438A, except the model name. Except for the different above, no other modification is performed. Sincerely, Signature: VTIN TECHNOLOGY Co., Limited Contact person: Derric Bai

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: Bluetooth FM Transmitter Model Number(s): BH438A, BH438B, BH438C Product Description: Bluetooth FM Transmitter 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: 2020-09-09 Name: Derric Bai 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: 2020-08-04 Subject; Request for Confidentiality FCC ID: 2AIL4-BH438A 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 VTIN TECHNOLOGY Co., Limited VTIN TECHNOLOGY Co., Limited Contact person: Derric Bai

External Photos TOP VIEW OFEUT BOTTOM VIEW OFEUT FRONT VIEW OFEUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT VIEW OF EUT(PORT)--1 VIEW OF EUT(PORT)-2

FCC ID Label Location FCC ID: 2AIL4-BH438A

Internal Photos OPEN VIEW OF EUT INTERNAL VIEW-1 OF EUT FM Antenna INTERNAL VIEW-2 OF EUT INTERNAL VIEW-3 OF EUT INTERNAL VIEW-4 OF EUT INTERNAL VIEW-5 OF EUT BT Antenna

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description Bluetooth FM Transmitter Model Name BH438A, BH438B, BH438C FCC ID 2AIL4-BH438A 2. EVALUATION METHOD According to 447498 D01 General RF Exposure Guidance v05 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 f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation 3. CALCULATION P t =4.597dBm=2.88mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(2.88mW /5mm) .[√2.480(GHz)]=0.90<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. §15.239 FM Pt= -61.94dBm=0.0000064mW The value of the Maximum output power P t is referred to the test report of the CFR47 For frequencies below 100 MHz and test separation distances ≤ 50 mm，the power threshold determined by the following: P max =0.5 * 474 * [1+log(100/f)] mW, where f is MHz For 88.1MHz, P max =250mW. Pt< P max. For 107.9MHz, P = 3 x 5 / 0.1079^0.5 = 45.7 mW P max =45.7mW. Pt< P max. Simultaneous transmission between Bluetooth and FM transmitter: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)]·[√f(GHz)/x] W/kg, for test separation distances ≤ 50 mm; where x = 7.5 for 1-g SAR and x = 18.75 for 10-g SAR. SAR=(0.90+0. 0000064)/7.5=0.120W/kg<1.6W/kg 4. CONCLUSION The SAR evaluation is not required.

Page 1 of 24 FCC Test Report Report No.: AGC00697200601FE06 FCC ID : 2AIL4-BH438A APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Bluetooth FM Transmitter BRAND NAME : VTIN MODEL NAME : BH438A, BH438B, BH438C APPLICANT : VTIN TECHNOLOGY Co., Limited DATE OF ISSUE : Aug. 01, 2020 STANDARD(S) : FCC Part 15.239 REPORT VERSION : V1.0 Attestation of Global Compliance(Shenzhen) Co., Ltd CAUTION: This report shall not be reproduced except in full without the written permission of the test laboratory and shall not be quoted out of context. Report No.: AGC00697200601FE06 Page 2 of 24 Report Revise Record Report Version Revise Time Issued Date Valid Version Notes V1.0 / Aug. 01, 2020 Valid Initial Release Report No.: AGC00697200601FE06 Page 3 of 24 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY .......................................................................................................... 4 2. GENERAL INFORMATION ...................................................................................................................... 5 2.1.PRODUCT DESCRIPTION .................................................................................................................. 5 3. MEASUREMENT UNCERTAINTY............................................................................................................ 5 4. DESCRIPTION OF TEST MODES............................................................................................................ 5 5. SYSTEM TEST CONFIGURATION .......................................................................................................... 6 5.1. EQUIPMENT USED IN EUT SYSTEM ................................................................................................ 6 5.2. SUMMARY OF TEST RESULTS ......................................................................................................... 6 6. TEST FACILITY ........................................................................................................................................ 7 7. RADIATED EMISSION ............................................................................................................................. 8 7.1. MEASUREMENT PROCEDURE ........................................................................................................ 8 7.2.TEST SETUP ..................................................................................................................................... 10 7.3. TEST RESULTFOR FIELD STRENGTH OF FUNDAMENTAL .......................................................... 11 7.4. TEST RESULT FOR FIELD STRENGTH OF BAND EDGE EMISSION ............................................. 11 7.5. TEST RESULT FOR SPURIOUS EMISSION .................................................................................... 12 8. BANDWIDTH .......................................................................................................................................... 14 8.1. MEASUREMENT PROCEDURE ...................................................................................................... 14 8.2. TEST SETUP .................................................................................................................................... 14 8.3. TEST RESULT .................................................................................................................................. 15 APPENDIX A: PHOTOGRAPHS OF TEST SETUP ................................................................................... 17 APPENDIX B:PHOTOGRAPHS OF EUT ................................................................................................... 18 Report No.: AGC00697200601FE06 Page 4 of 24 1. VERIFICATION OF CONFORMITY Applicant VTIN TECHNOLOGY Co., Limited Address UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI Hong Kong Manufacturer VTIN TECHNOLOGY Co., Limited Address UNIT D 16/F ONE CAPITAL PLACE 21 LUARD ROAD WAN CHAI Hong Kong Factory Dongguan Pinmi Electronic Technology Co., Ltd Address 2F, E block, Hongda Industrial Park, Shima Community, Tangxia Town, Dongguan City, Guangdong, China Product Designation Bluetooth FM Transmitter Brand Name VTIN Test Model BH438A Series Model BH438B, BH438C Difference Description All the same except for the model name Date of test Jun. 10, 2020 to July 24, 2020 Deviation No any deviation from the test method Condition of Test Sample Normal Test Result Pass Report Template AGCRT-US-BR/RF (2013-03-01) We hereby certify that: The above equipment was tested by Attestation of Global Compliance (Shenzhen) Co., Ltd. The test data, data evaluation, test procedures, and equipment configurations shown in this report were made in accordance with the procedures given in ANSI C63.10 (2013) and the energy emitted by the sample EUT tested as described in this report is in compliance with radiated emission limits of FCC part 15.239. Prepared By John Zeng Project Engineer July 24, 2020 Reviewed By Max Zhang Reviewer Aug. 01, 2020 Approved By Forrest Lei Authorized Officer Aug. 01, 2020 Report No.: AGC00697200601FE06 Page 5 of 24 2. GENERAL INFORMATION 2.1.PRODUCT DESCRIPTION A major technical description of EUT is described as following Operation Frequency 88.1MHz-107.9MHz Field Strength(3m) 33.26dBuV/m(AVG)@3m Modulation FM Number of channels 199(Channel spacing 100kHz) Hardware Version V1.0 Software Version V1.0 Antenna Designation Integral Antenna (Met 15.203 Antenna requirement) Antenna Gain 1.2dBi Power Supply DC 12-24V by car battery NOTE: About the EUT, please refer to User’s Manual. 3. MEASUREMENT UNCERTAINTY - Uncertainty of Radiated Emission below 1GHz, Uc = ±4.0 dB - Uncertainty of Radiated Emission above 1GHz, Uc = ±4.8 dB 4. DESCRIPTION OF TEST MODES NO. TEST MODE DESCRIPTION 1 Transmitting mode(Low channel-88.1MHZ) 2 Transmitting mode(Middle channel-98.0MHZ) 3 Transmitting mode(High channel-107.9MHZ) Note: 1. For Radiated Emission, 3axis were chosen for testing for each applicable mod…

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Test Setup Photos RADIATED EMISSION TEST SETUP BELOW 1GHZ RADIATED EMISSION TEST SETUP ABOVE 1GHZ CONDUCTED TEST SETUP