2AS9DSIFI2TWS headphone

FCC ID: 2AS9DSIFI2

Differences Description We GuangDong Substanbo Technology Co., Ltd. state: Product： TWS headphone Model Name： SiFi II, SiFi III Brand Name： Bomaker FCC ID: 2AS9DSIFI2 The electrical circuit design, layout, components used and internal wiring for above models are identical, only different in model name and appearance. Signatory Date 2020-04.01 Signature Name: Lawrence Chen Title: Product Director Company: GuangDong Substanbo Technology Co., Ltd. Address: Room 2508, Bd. 4, Tianan yungu 2nd Industrial Park, Longgang District Shenzhen, China. The product have left and right earphones ,they are electrically identical.

2020-04-01 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID:__ 2AS9DSIFI2___ Product Name:___ TWS headphone ___ Model name: SiFi II, SiFi III Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...)  Schematics  Block diagram  Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Sincerely, Signature Name: Lawrence Chen Title: Product Director Company: GuangDong Substanbo Technology Co., Ltd. Address: Room 2508, Bd. 4, Tianan yungu 2nd Industrial Park, Longgang District Shenzhen, China.

2020-04-01 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen STS Test Services Co., Ltd., 1/F., Building B, Zhuoke Science Park, No.190, Chongqing Road, Fuyong Street, Bao’an District, Shenzhen, Guangdong,China (Name of Agent company name and address) to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with GuangDong Substanbo Technology Co., Ltd. Room 2508, Bd. 4, Tianan yungu 2nd Industrial Park, Longgang District Shenzhen, China. (Applicant Name and address) Sincerely, Signature Name: Lawrence Chen Title: Product Director Company: GuangDong Substanbo Technology Co., Ltd. Address: Room 2508, Bd. 4, Tianan yungu 2nd Industrial Park, Longgang District Shenzhen, China.

Page 1 of 5 Report No.: STS2003213 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Photo 1 Photo 2 Page 2 of 5 Report No.: STS2003213 Photo 3 Photo 4 Page 3 of 5 Report No.: STS2003213 Photo 5 Photo 6 Page 4 of 5 Report No.: STS2003213 Photo 7 Photo 8 Page 5 of 5 Report No.: STS2003213 Photo 9

Label TWS headphone Model name: SiFi II FCC ID: 2AS9DSIFI2 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. W:10mm L:20mm Note:The label is silk-screen on the sample

Page 1 of 2 Report No.: STS2003213 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Photo 1 Photo 2 Page 2 of 2 Report No.: STS2003213 Photo 3 Photo 4 BT Antenna

FCC ID : 2AS9DSIFI2 RF EXPOSURE EVALUATION METHOD SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. 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 The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. FCC ID : 2AS9DSIFI2 Maximum measured transmitter power. BT5.0+EDR The Worst Case Mode 2402-2480MHz Detector PEAK GFSK 5±1dBm π/4-DQPSK 6±1dBm 8DPSK 6±1dBm Remark: The worst case gain of the antenna is 1.5dBi. 1.5dBi logarithmic terms convert to numeric result is nearly 1.41 Mode frequency (GHz) M ax im um Peak Conduc ted O utput Power (dBm) Tune up Pow er(dBm) Tune up Pow er (mW) Result Lim it GFSK2.485.5363 π/4-DQPSK2.4416.7473 8DPSK2.4416.9673 3.9810717061.2539 5.0118723361.5661 5.0118723361.5661 Threshold at which no SAR required is 1.5661≤ 3.0 for 1-g SAR, Separation distance is 5mm.

Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from STS, All Test Data Presented in this report is only applicable to presented Test sample. Shenzhen STS Test Services Co., Ltd. A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District,Bao’an District, Shenzhen, Guang Dong, China TEL: +86-755 3688 6288 FAX: +86-755 3688 6277 E-mail:[email protected] RADIO TEST REPORT Report No.: STS2003213W02 Issued for GuangDong Substanbo Technology Co., Ltd. Room 2508, Bd. 4, Tianan yungu 2nd Industrial Park, Longgang District Shenzhen, China. Product Name: TWS headphone Brand Name: Bomaker Model Name: SiFi II Series Model: SiFi III FCC ID: 2AS9DSIFI2 Test Standard: FCC Part 15.247 S T L A B S Page 2 of 73 Report No.: STS2003213W02 TEST RESULT CERTIFICATION Applicant’s Name ................... : GuangDong Substanbo Technology Co., Ltd. Address .................................. : Room 2508, Bd. 4, Tianan yungu 2nd Industrial Park, Longgang District Shenzhen, China. Manufacture's Name .............. : GuangDong Substanbo Technology Co., Ltd. Address .................................. : Room 2508, Bd. 4, Tianan yungu 2nd Industrial Park, Longgang District Shenzhen, China. Product Description Product Name ........................ : TWS headphone Brand Name ........................... : Bomaker Model Name ........................... : SiFi II SeriesModel ........................... : SiFi III Test Standards ....................... : FCC Part15.247 Test Procedure ....................... : ANSI C63.10-2013 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of STS, this document may be altered or revised by STS, personal only, and shall be noted in the revision of the document. Date of Test ................................ : Date of receipt of test item .......... : 16 Mar. 2020 Date (s) of performance of tests . : 16 Mar. 2020 ~ 21 Mar. 2020 Date of Issue .............................. : 23 Mar. 2020 Test Result .................................. : Pass Testing Engineer : (ChrisChen) Technical Manager : (Sean she) Authorized Signatory : (Vita Li) Page 3 of 73 Report No.: STS2003213W02 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 10 2.4 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 11 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 12 2.6 EQUIPMENTS LIST 13 3.EMC EMISSION TEST 14 3.1 CONDUCTED EMISSION MEASUREMENT 14 3.2 RADIATED EMISSION MEASUREMENT 18 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 30 4.1 LIMIT 30 4.2 TEST PROCEDURE 30 4.3 TEST SETUP 30 4.4 EUT OPERATION CONDITIONS 30 4.5 TEST RESULTS 31 5. NUMBER OF HOPPING CHANNEL 46 5.1 LIMIT 46 5.2 TEST PROCEDURE 46 5.3 TEST SETUP 46 5.4 EUT OPERATION CONDITIONS 46 5.5 TEST RESULTS 47 6. AVERAGE TIME OF OCCUPANCY 48 6.1 LIMIT 48 6.2 TEST PROCEDURE 48 6.3 TEST SETUP 48 6.4 EUT OPERATION CONDITIONS 48 6.5 TEST RESULTS 49 7. HOPPING CHANNEL SEPARATION MEASUREMEN 55 7.1 LIMIT 55 Page 4 of 73 Report No.: STS2003213W02 Table of Contents Page 7.2 TEST PROCEDURE 55 7.3 TEST SETUP 55 7.4 EUT OPERATION CONDITIONS 55 7.5 TEST RESULTS 56 8. BANDWIDTH TEST 62 8.1 LIMIT 62 8.2 TEST PROCEDURE 62 8.3 TEST SETUP 62 8.4 EUT OPERATION CONDITIONS 62 8.5 TEST RESULTS 63 9. OUTPUT POWER TEST 69 9.1 LIMIT 69 9.2 TEST PROCEDURE 69 9.3 TEST SETUP 70 9.4 EUT OPERATION CONDITIONS 70 9.5 TEST RESULTS 71 10. ANTENNA REQUIREMENT 72 10.1 STANDARD REQUIREMENT 72 10.2 EUT ANTENNA 72 Page 5 of 73 Report No.: STS2003213W02 Revision History Rev. Issue Date Report NO. Effect Page Contents 00 23 Mar. 2020 STS2003213W02 ALL Initial Issue Page 6 of 73 Report No.: STS2003213W02 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247(a)(1) Hopping Channel Separation PASS -- 15.247(a)(1)&(b)(1) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247(d) Conducted Spurious & Band Edge Emission PASS -- 15.247(a)(iii) Number of Hopping Frequency PASS -- 15.247(a)(iii) Dwell Time PASS -- 15.247(a)(1) Bandwidth PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2)All tests are according to ANSI C63.10-2013. Page 7 of 73 Report No.: STS2003213W02 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District,Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ±U,where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2,providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.68dB 2 Unwanted Emissions, conducted ±2.988dB 3 All emissions, radiated 30-1GHz ±6.7dB 4 All emissions, radiated1G-6GHz ±5.5dB 5 All emissions, radiated>6G ±5.8dB 6 Conducted Emission (9KHz-150KHz) ±4.43dB 7 Conducted Emission (150KHz-30MHz) ±5dB Page 8 of 73 Report No.: STS2003213W02 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name TWS headphone Trade Name Bomaker Model Name SiFi II Series Model SiFi III Model Difference Onl…

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Page 1 of 2 FCC ID: 2AS9DSIFI2 DSS Setup photo Model name: SiFi II DSS conduction DSS radiation L Page 2 of 2 FCC ID: 2AS9DSIFI2 DSS radiation H