2AZJ2TW004TWS EARBUDS

Dongguan Yinwo Electronic Technology Co., Ltd Agent Authorization Company: Dongguan Yinwo Electronic Technology Co., Ltd Address: Building 1, No. 18 Jiaoping Road, Tangxia Town, Dongguan, Guangdong, China Product Name: TWS EARBUDS Model Number(s): FB-49-ASST, FB-50, FB-51, FB-52 Product Description: TWS EARBUDS 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. 19, 2022 Name: Jessie Li Title: Saler Company: Dongguan Yinwo Electronic Technology Co., Ltd

Dongguan Yinwo Electronic Technology Co., Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Jan. 19, 2022 Subject; Request for Confidentiality FCC ID: 2AZJ2TW004 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 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: Jessie Li Title: Saler

Model Difference Declaration To Whom It May Concern, We, Dongguan Yinwo Electronic Technology Co., Ltd(TWS EARBUDS) Trademark:iHip;ModelNumber:FB-49- ASST, FB-50, FB-51, FB-52;All model’s the function, software and electric circuit are the same, only with a product color, appearance and model named different for commercial purpose. Test sample model: FB-49-ASST. Please contact me if you have any question. Name: Jessie Li Date: Jan. 19, 2022 Title: Saler Signature of applicant:

Annex A External Photos Report No.: HK2201130183‐E Page 1 of 4 Report No.: HK2201130183‐E Page 2 of 4 Report No.: HK2201130183‐E Page 3 of 4 Report No.: HK2201130183‐E Page 4 of 4 Series Model:

FCC ID LABEL: Label Location FCC ID: 2AZJ2TW004

Annex B Internal Photo Report No.:HK2201130183-E Page 1 of 4 Antenna Report No.:HK2201130183-E Page 2 of 4 Report No.:HK2201130183-E Page 3 of 4 Report No.:HK2201130183-E Page 4 of 4

FCC RF Exposure EUT Description: TWS EARBUDS Model No.: FB-49-ASST FCC ID: 2AZJ2TW004 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 Output power （dBm） Tune Up Power （dBm） Max Tune Up power mW Min test separati on distance mm Result Limit SAR Test Exclusion EDR 7.02 6.2±1(7.2) 5.248 5 1.627 3.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2201130183-E antenna gain=0dBi Per KDB 447498 D01, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. The test exclusion threshold is 1.627 which is<= 3, SAR 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 52 Report No.: HK2201130183-E TEST REPORT FCC PART 15 SUBPART C 15.247 Test report On Behalf of Dongguan Yinwo Electronic Technology Co., Ltd For TWS EARBUDS Model No.: FB-49-ASST, FB-50, FB-51, FB-52 FCC ID: 2AZJ2TW004 Prepared For : Dongguan Yinwo Electronic Technology Co., Ltd Building 1, No. 18 Jiaoping Road, Tangxia Town, Dongguan, Guangdong, China Prepared By : Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Jan. 11, 2022 ~Jan. 17, 2022 Date of Report: Jan. 17, 2022 Report Number: HK2201130183-E Page 2 of 52 Report No.: HK2201130183-E TEST RESULT CERTIFICATION Applicant’s name ....... Dongguan Yinwo Electronic Technology Co., Ltd Address ....................... . Building 1, No. 18 Jiaoping Road, Tangxia Town, Dongguan, Guangdong, China Manufacture's Name . . Dongguan Yinwo Electronic Technology Co., Ltd Address ........................ Building 1, No. 18 Jiaoping Road, Tangxia Town, Dongguan, Guangdong, China Product description Trade Mark: iHip Product name ................ TWS EARBUDS Model and/or type reference ................... . FB-49-ASST, FB-50, FB-51, FB-52 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 ... .Jan. 11, 2022 ~Jan. 17, 2022 Date of Issue ................................ .Jan. 17, 2022 Test Result .................................... . Pass Prepared by: Project Engineer Reviewed by: Project Supervisor Approved by: Technical Director Page 3 of 52 Report No.: HK2201130183-E Table of Contents Page 1. SUMMARY............................................................................................................................................................ 5 1.1. TEST STANDARDS ..................................................................................................................................................... 5 1.2. TEST DESCRIPTION ................................................................................................................................................... 5 1.3. INFORMATION OF THE TEST LABORATORY ............................................................................................................. 6 1.4. STATEMENT OF THE MEASUREMENT UNCERTAINTY ............................................................................................... 6 2. GENERAL INFORMATION ....................................................................................................................................... 7 2.1. ENVIRONMENTAL CONDITIONS ............................................................................................................................... 7 2.2. GENERAL DESCRIPTION OF EUT ............................................................................................................................... 7 2.3. DESCRIPTION OF TEST MODES AND TEST FREQUENCY ............................................................................................ 8 2.4. EQUIPMENTS USED DURING THE TEST .................................................................................................................... 9 2.5. RELATED SUBMITTAL(S) / GRANT (S) ........................................................................................................................ 9 2.6. MODIFICATIONS ...................................................................................................................................................... 9 2.7. DESCRIPTION OF TEST SETUP ................................................................................................................................ 10 3. TEST CONDITIONS AND RESULTS ......................................................................................................................... 11 3.1. CONDUCTED EMISSIONS TEST ............................................................................................................................... 11 3.2. RADIATED EMISSIONS AND BAND EDGE ................................................................................................................ 14 3.3. MAXIMUM PEAK CONDUCTED OUTPUT POWER ................................................................................................... 25 3.4. 20DB BANDWIDTH ................................................................................................................................................ 26 3.5. FREQUENCY SEPARATION ...................................................................................................................................... 30 3.6. NUMBER OF HOPPING FREQUENCY ...................................................................................................................... 32 3.7. TIME OF OCCUPANCY (DWELL TIME) ..................................................................................................................... 34 3.8. OUT‐OF‐BAND EMISSIONS ..................................................................................................................................... 38 3.9. PSEUDORANDOM FREQUENCY HOPPING SEQUENCE ........................................................................................... 48 3.10. ANTENNA REQUIREMENT...................................................................................................................................... 49 4. TEST SETUP PHOTOS OF THE EUT .................................…

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Page 30 of 52 Report No.: HK2201130183-E 3.5. FREQUENCY SEPARATION LIMIT Frequency hopping systems shall have hopping channel carrier frequencies separated by minimum of 25 KHz or the 2/3*20dB bandwidth of the hopping channel, whichever is greater. TEST PROCEDURE The transmitter output was connected to the spectrum analyzer through an attenuator. The bandwidth of the fundamental frequency was measured by spectrum analyzer with 300 KHz RBW and 1000 KHz VBW. TEST CONFIGURATION EUT SPECTRUM ANALYZER TEST RESULTS Modulation Channel Channel Separation (MHz) Limit(MHz) Result GFSK Middle Channel 1.000 2/3*20dB bandwidth Pass π/4DQPSK Middle Channel 1.000 2/3*20dB bandwidth Pass 8DPSK Middle Channel 1.000 2/3*20dB bandwidth Pass Note: We have tested all mode at high, middle and low channel, and recorded worst case at middle. Test plot as follows: Page 31 of 52 Report No.: HK2201130183-E Frequency Separation GFSK π/4DQPSK 8DPSK Page 32 of 52 Report No.: HK2201130183-E 3.6. NUMBER OF HOPPING FREQUENCY Limit Frequency hopping systems in the 2400–2483.5 MHz band shall use at least 15 channels. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. Set spectrum analyzer start 2400MHz to 2483.5MHz. Test Configuration EUT SPECTRUM ANALYZER Test Results Modulation Number of Hopping Channel Limit Result GFSK 79 ≥15 Pass π/4DQPSK 79 8DPSK 79 Test plot as follows: Page 33 of 52 Report No.: HK2201130183-E GFSK Modulation π/4DQPSK Modulation 8DPSK Modulation Page 34 of 52 Report No.: HK2201130183-E 3.7. TIME OF OCCUPANCY (DWELL TIME) Limit The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of 0.4 seconds multiplied by the number of hopping channels employed. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. Set center frequency of spectrum analyzer=operating frequency with 1MHz RBW and 3MHz VBW, Span 0Hz. Test Configuration EUT SPECTRUM ANALYZER Test Results Modulation Packet Pulse time (ms) Dwell time (second) Limit (second) Result GFSK DH1 0.39 0.125 0.40 PASS DH3 1.65 0.264 DH5 2.90 0.309 π/4DQPSK 2-DH1 0.40 0.128 0.40 PASS 2-DH3 1.66 0.266 2-DH5 2.90 0.309 8DPSK 3-DH1 0.41 0.131 0.40 PASS 3-DH3 1.66 0.266 3-DH5 2.91 0.310 Note: 1. We have tested all mode at high, middle and low channel, and recoreded worst case at middle channel. 2. Dwell time=Pulse time (ms) × (1600 ÷ 2 ÷ 79) ×31.6 Second for DH1, 2-DH1, 3-DH1 Dwell time=Pulse time (ms) × (1600 ÷ 4 ÷ 79) ×31.6 Second for DH3, 2-DH3, 3-DH3 Dwell time=Pulse time (ms) × (1600 ÷ 6 ÷ 79) ×31.6 Second for DH5, 2-DH5, 3-DH5 Test plot as follows: Page 35 of 52 Report No.: HK2201130183-E GFSK Modulation DH1 DH3 DH5 Page 36 of 52 Report No.: HK2201130183-E π/4DQPSK Modulation 2-DH1 2-DH3 2-DH5 Page 37 of 52 Report No.: HK2201130183-E 8DPSK Modulation 3-DH1 3-DH3 3-DH5 Page 38 of 52 Report No.: HK2201130183-E 3.8. OUT-OF-BAND EMISSIONS Limit In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF con-ducted or a radiated measurement, pro-vided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter com-plies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated device is operating, the RF power that is produced shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided that the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of root-mean-square averaging over a time interval, as permitted under Section 5.4(4), the attenuation required shall be 30 dB instead of 20 dB. Attenuation below the general field strength limits specified in RSS-Gen is not required. Test Procedure Connect the transmitter output to spectrum analyzer using a low loss RF cable, and set the spectrum analyzer to RBW=100 kHz, VBW= 300 kHz, peak detector , and max hold. Measurements utilizing these setting are made of the in-band reference level, band edge and out-of-band emissions. Test Configuration EUT SPECTRUM ANALYZER Test Results Remark: The measurement frequency range is from 30MHz to the 10th harmonic of the fundamental frequency. The lowest, middle and highest channels are tested to verify the spurious emissions and bandage measurement data. We measured all conditions (DH1, DH3, DH5) and recorded worst case at DH5, 2DH5 and 3DH5. Test plot as follows: Page 39 of 52 Report No.: HK2201130183-E GFSK CH00 CH39 Page 40 of 52 Report No.: HK2201130183-E CH78 Page 41 of 52 Report No.: HK2201130183-E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 42 of 52 Report No.: HK2201130183-E π/4DQPSK CH00 CH39 Page 43 of 52 Report No.: HK2201130183-E CH78 Page 44 of 52 Report No.: HK2201130183-E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 45 of 52 Report No.: HK2201130183-E 8DPSK CH00 CH39 Page 46 of 52 Report No.: HK2201130183-E CH78 Page 47 of 52 Report No.: HK2201130183-E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 48 of 52 Report No.: HK2201130183-E 3.9. P…

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Radiated Emissions Conducted Emission