YIL-MH-801TWS BLUETOOTH EARPHONE

SHENZHEN CHENGYAN SCIENCE & TECHNOLOGY CO., LTD Agent Authorization Company: SHENZHEN CHENGYAN SCIENCE & TECHNOLOGY CO., LTD Address: Room 1808, Shenhua Commercial Building,Jiabin Rd., Luohu district Shenzhen, P.R.China Product Name: TWS BLUETOOTH EARPHONE Model Number(s): MH-801 Product Description: TWS BLUETOOTH EARPHONE 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. 10, 2023 Name: Charlie Wang Title: General Manager Company: SHENZHEN CHENGYAN SCIENCE & TECHNOLOGY CO., LTD

SHENZHEN CHENGYAN SCIENCE & TECHNOLOGY CO., LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Jan. 10, 2023 Subject; Request for Confidentiality FCC ID: YIL-MH-801 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 pursuantto 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: Charlie Wang Title: General Manager

Annex A External Photos Report No.: HK2301050041-E Page 1 of 4 Report No.: HK2301050041-E Page 2 of 4 Report No.: HK2301050041-E Page 3 of 4 Report No.: HK2301050041-E Page 4 of 4

FCC ID LABEL: Ca. 5mm x 15mm label location FCC ID: YIL‐MH‐801

Annex B Internal Photo Report No.: HK2301050041-E Page 1 of 4 Antenna Report No.: HK2301050041-E Page 2 of 4 Report No.: HK2301050041-E Page 3 of 4 Report No.: HK2301050041-E Page 4 of 4

FCC RF Exposure EUT Description: TWS BLUETOOTH EARPHONE Model No.: MH-801 FCC ID: YIL-MH-801 1. Limits According to KDB 447498 D01 General RF Exposure Guidance v01 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 dBm/mW Min test separati on distance mm ResultLimit SAR Test Exclusion EDR 2.32 2±1(3) 2 5 0.6283.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2301050041-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 0.628 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 47 Report No.: HK2301050041-E FCC Test Report FCC PART 15 SUBPART C 15.247 Test report On Behalf of SHENZHEN CHENGYAN SCIENCE & TECHNOLOGY CO., LTD For TWS BLUETOOTH EARPHONE Model No.: MH-801 FCC ID: YIL-MH-801 Prepared For : SHENZHEN CHENGYAN SCIENCE & TECHNOLOGY CO., LTD Room 1808, Shenhua Commercial Building,Jiabin Rd., Luohu district Shenzhen, P.R.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. 02, 2023 ~ Jan. 09, 2023 Date of Report: Jan. 09, 2023 Report Number: HK2301050041-E Page 2 of 47 Report No.: HK2301050041-E Test Result Certification Applicant’s Name .................. : SHENZHEN CHENGYAN SCIENCE & TECHNOLOGY CO., LTD Address .................................. : Room 1808, Shenhua Commercial Building,Jiabin Rd., Luohu district Shenzhen, P.R.China Manufacture's Name ............. : SHENZHEN CHENGYAN SCIENCE & TECHNOLOGY CO., LTD Address .................................. : Room 1808, Shenhua Commercial Building,Jiabin Rd., Luohu district Shenzhen, P.R.China Product Description Trade Mark ............................. : Diso Product Name ........................... : TWS BLUETOOTH EARPHONE Model and/or type reference...: MH-801 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. 02, 2023 ~ Jan. 09, 2023 Date of Issue .................................... Jan. 09, 2023 Test Result ........................................ Pass Prepared by: Project Engineer Reviewed by: Project Supervisor Approved by: Technical Director Page 3 of 47 Report No.: HK2301050041-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) ................................................................................................ 10 2.6. Modifications ............................................................................................................................ 10 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 ............................................................................................................... 29 3.6. Number of Hopping Frequency ................................................................................................ 31 3.7. Time of Occupancy (Dwell Time) ............................................................................................. 33 3.8. Out‐of‐Band Emissions ............................................................................................................. 36 3.9. Pseudorandom Frequency Hopping Sequence ........................................................................ 43 3.10. Antenna Requirement .............................................................................................................. 44 4. Test Setup Photos of the EUT ................................................................................................... 45 5. Photos of the EUT .................................................................................................................... 47 Page 4 of 47 Report No.: HK2301050041-E ** Modified History ** Revision Description Issued Data Remark Revision 1.0 Initial Test Report Release Jan. 09, 2023 Jason Zhou Page 5 of 47 Report No.: HK2301050…

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1 Antenna Part Specification Project name： 801(lanxun) Material category： BT antenna Version： V1.0 Date： 2023.01.10 2 Contents I：The report of passive data .................................................................................................... 3 II：3D Active test report of antenna ...................................................................................... 8 III：Matching circuit ................................................................................................................ 9 IV：Structure file .................................................................................................................... 10 Change record Compile / change date Reason for change Changed content Version 2023.01.10 First edition First edition V1.0 3 I：The report of passive data Angilent E5071C VSWR(S11) parameter（L）： Efficiency： 2400-2480 MHz Frequency （MHz） Efficiency Efficiency (dB ) Gain (dBi) 2400 24.4% -6.1 -2.57 2410 26.3% -5.8 -2.14 2420 28.0% -5.5 -1.83 2430 28.5% -5.5 -1.64 2440 28.5% -5.5 -1.54 2450 30.0% -5.2 -1.26 2460 30.2% -5.2 -1.19 2470 32.8% -4.8 -0.81 2480 35.3% -4.5 -0.49 Average value 29.3% -5.4 -1.50 4 Antenna radiation pattern: Theta=90.00deg Phi=90.00deg Phi=0.00deg 7 3D Antenna radiation pattern: 8 II：3D Active test report of antenna BT Channel TRP（dBm） TIS（dBm） CH 0 2.1 -86.1 CH 39 2.7 -87.2 CH 78 3.1 -87.3 OTA Standard Chamber 9 III：Matching circuit 10 IV：Structure file

Model: MH-801 Radiated Emissions Conducted Emission