2BRD9-M142TWS Wireless earphone

FCC Warnning: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 reasonableprotection againt harmful interference in a residential installation. This equipment generates,uses and can radiate radio frequency energy and, if not installed and used in accordance withthe instructions, may cause harmful interference to radio communications. However, thereis no guarantee that interference will not occur in a particular installation. If thisequipment does cause harmful interference to radio or television reception, which can bedetermined by turning the equipment off and on, the user is encouraged to try to correct theinterference 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 isconnected.• Consult the dealer or an experienced radio/TV technician for help.Caution: Any changes or modifications to this device not explicitly approved by manufacturercould void your authority to operate this equipment.This device complies with part 15 of the FCC Rules. Operation is subject to the following twoconditions:(1)This device may not cause harmful interference, and (2) this device must accept anyinterference received, including interference that may cause undesired operation.This equipment complies with FCC radiation exposure limits set forth for an uncontrolledenvironment. This equipment should be installed and operated with minimum distance 0cmbetween the radiator and your body

YUEHANG INDUSTRIAL LIMITED Add: RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong, China Date: 2025-11-29 FCC ID: 2BRD9-M142 Dear Sir/Madam, We, YUEHANG INDUSTRIAL LIMITED Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these models are same, Only model number is different for these models: Product name: TWS Wireless earphone Model no.: M142,M141,M130,M134,M127,M122 Additionally, for each model above, the left&right earphones are the same schematic circuits, but the locations of components are different. Refer to the follow photos: Left Right YUEHANG INDUSTRIAL LIMITED Add: RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong, China Sincerely, Name/Title： Jianying Li/Manager Company: YUEHANG INDUSTRIAL LIMITED Address: RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong, China Phone: 13538214502 Fax: E-Mail: [email protected]

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 10 Product Name: TWS Wireless earphone Model No.: M142 EUT Constructional Details External Photo Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 10 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 10 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 4 of 10 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 5 of 10 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 6 of 10 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 7 of 10 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 8 of 10 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 9 of 10 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 10 of 10 ------End------

Label and Location Size: L: 1.0cm*W: 0.2cm Label and Location FCC ID : 2BRD9-M142

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 6 Product Name: TWS Wireless earphone Model No.: M142 Internal Photos of the EUT Left side Photo Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 6 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 6 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 4 of 6 Right side Photo Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 5 of 6 Report No.: HTT202511276 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 6 of 6 ------End------

Shenzhen HTT Technology Co., Ltd. Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 1 of 9 RF Exposure evaluation Report Reference No. ..................... : FCC ID............................................. : HTT202511276F02 2BRD9-M142 Compiled by ( position+printed name+signature) . : File administrators Supervised by ( position+printed name+signature) . : Project Engineer Approved by ( position+printed name+signature) . : RF Manager Date of issue .................................... : Nov. 18, 2025 Testing Laboratory Name .............. : Shenzhen HTT Technology Co.,Ltd. Address............................................ : 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao’an District, Shenzhen, Guangdong, China Applicant’s name ............................ : YUEHANG INDUSTRIAL LIMITED Address............................................ : RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong,China Standard ........................................... : 47CFR §1.1310 47CFR §2.1093 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen HTT Technology Co.,Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HTT Technology Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HTT 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. Test item description ..................... : TWS Wireless earphone Manufacturer .................................... : YUEHANG INDUSTRIAL LIMITED Trade Mark ........................................ N/A Model/Type reference ...................... : M142 Rating ............................................... : Headphone battery capacity:3.7V/40mAh (polymer battery) Charging bin battery capacity:3.7V/400mAh (polymer battery) Charging interface :USB Type-C Result ............................................... : PASS Report No.: HTT202511276F02 Page 2 of 9 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 2 of 9 T E S T R E P O R T Equipment under Test : TWS Wireless earphone Model /Type : M142 Listed Models : M141,M130,M134,M127,M122 Applicant : YUEHANG INDUSTRIAL LIMITED Address : RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong,China Manufacturer : YUEHANG INDUSTRIAL LIMITED Address : RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong,China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: HTT202511276F02 Page 3 of 9 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 3 of 9 Contents 1 T E S T S T A N D A R D S ................................................... 4 2 S U M M A R Y .............................................................. 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Special Accessories 5 2.4 Modifications 5 3 T E S T E N V I R O N M E N T 6 3.1 Address of the test laboratory 6 3.2 Test Facility 6 3.3 Statement of the measurement uncertainty 6 4 T E S T L I M I T 7 4.1 Requirement 7 4.2 Conducted Power Results 8 4.3 Manufacturing tolerance 8 4.4 Evaluation Result 9 4.5 Simultaneous Transmission for SAR Exclusion 9 5 C O N C L U S I O N 9 Report No.: HTT202511276F02 Page 4 of 9 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 4 of 9 1 T E S T S T A N D A R D S The tests were performed according to following standards: ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz. FCC KDB 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Device, RF Exposure, Equipment Authorization Procedures. FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits. FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices Report No.: HTT202511276F02 Page 5 of 9 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 5 of 9 2 S U M M A R Y 2.1 General Remarks Date of receipt of test sample : Nov. 05, 2025 Testing commenced on : Nov. 05, 2025 Testing concluded on : Nov. 18, 2025 2.2 Product Description Product description: TWS Wireless earphone Model/Type reference: M142 Power supply: Headphone battery capacity:3.7V/40mAh (polymer battery) Charging bin battery capacity:3.7V/400mAh (polymer battery) Charging interface :USB Type-C Adapter Information (Auxiliary test provided by the lab): Mode: GS-0500200 Input: AC100-240V, 50/60Hz, 0.3A max Output: DC 5V, 2A Testing sample ID： HTT202511276-1# (Engineer sample) HTT202511276-2# (Normal sample) Hardware version: / Software version: / Bluetooth : Supported Type: Bluetooth BR/EDR Mod…

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PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES ＝± HOLEDIA ＝± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-1608Specification DOCUMENT NO. 1608 SPECREV. P1 1 SPECIFICATIONS CUSTOMER: DESCRIPTION: GeomagneticAntenna CUSTOMERPARTNO: OURMODELNO: PBX1608MA02 DATE: PLEASERETURNTOUSONECOPYOF“SPECIFICATIONFORAPPROVAL” WITHYOURAPPROVEDSIGNATURES ApprovedLiuFeiAuditLiuFeiMakingLiuXiaoMei CustomerAcknowledgesSignature Date PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES ＝± HOLEDIA ＝± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-1608Specification DOCUMENT NO. 1608 SPECREV. P1 2 PBX1608MA02Specification OperatingTemp.:-40°C~+85°C 1.FEATURES: ●Lightweight,compact ●Widebandwidth,lowcost ●Built-inantennawithhighgain 2.APPLICATIONS: ●Bluetooth,WirelessLAN,MobileTV ●HomeRFSystem,etc 3.PRODUCTIDENTIFICATION (1)(2)(3) (1)Producttype:MultilayerchipAntenna (2)CenterFrequency:2450MHz (3)ExternalDimensions(L×W)(mm):1.6*0.8 4.SHAPEANDDIMENSIONS: LWHA 1.60 ± 0.200.80 ± 0.20 0.80±0.200.30±0.10 CH IP45 016 2 08 PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES ＝± HOLEDIA ＝± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-1608Specification DOCUMENT NO. 1608 SPECREV. P1 3 ●AntennaislocatedinthePCBboardorthemiddleposition(long-barheadphones):(units:mm) Theantennaisoptimallyplacedinthemiddlearea,andatleastonerowofthroughholes aroundtheclearanceareaisoptimallyrequired. ●WhentheantennaislocatedattheedgeofthePCBboard(in-earheadphonesandsome long-barheadphones): Theantennaisoptimallyplaced ontheedgeofthePCBA;theantennaand itsalignmentaresetonasinglelayer. Designcriteria:： 1.Thedimensionsinthediagramareforreferenceonly;theactualdimensionsareoptimizedfor differentversions. 2.Theoptimumclearanceareaaroundtheneedforatleastarowofholes,aperture0.3mm,and otherPCBAcircuitormaterialisolation. PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES ＝± HOLEDIA ＝± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-1608Specification DOCUMENT NO. 1608 SPECREV. P1 4 AntennaPackageScheme1（3.5mm×7.5mm） PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES ＝± HOLEDIA ＝± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-1608Specification DOCUMENT NO. 1608 SPECREV. P1 5 AntennaPackageSchemeII（4.5mm×6mm） PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES ＝± HOLEDIA ＝± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-1608Specification DOCUMENT NO. 1608 SPECREV. P1 6 AntennaPackageSchemeIII（1.5mm×10mm） PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES ＝± HOLEDIA ＝± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-1608Specification DOCUMENT NO. 1608 SPECREV. P1 7 ElectricalCharacteristics CharacteristicCurves PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES ＝± HOLEDIA ＝± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-1608Specification DOCUMENT NO. 1608 SPECREV. P1 8 RadiationPattern PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIE…

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1 Appendix RF Test Data for BT Company: : YUEHANG INDUSTRIAL LIMITED EUT : TWS Wireless earphone FCC ID: : 2BRD9-M142 Model Number : M142 Report No. : HTT202511276F01 Reviewed By : Heber He 2 1. Duty Cycle 1.1 Test Result 1.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) Packet Type T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) GFSK SISO 2402 DH5 2.913 3.749 77.70 1.10 0.03 2441 DH5 2.914 3.750 77.71 1.10 0.03 2480 DH5 2.913 3.749 77.70 1.10 3.42 Pi/4DQPSK SISO 2402 2DH5 2.920 3.751 77.85 1.09 0.03 2441 2DH5 2.919 3.749 77.86 1.09 0.01 2480 2DH5 2.920 3.751 77.85 1.09 0.03 8DPSK SISO 2402 3DH5 2.922 3.749 77.94 1.08 3.93 2441 3DH5 2.924 3.751 77.95 1.08 0.03 2480 3DH5 2.923 3.751 77.93 1.08 0.03 3 1.2 Test Graph 1.2.1 Ant1 GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV 4 GFSK_DH5_HCH_2480MHz_Ant1_NTNV Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV 5 Pi/4DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV 6 8DPSK_3DH5_LCH_2402MHz_Ant1_NTNV 8DPSK_3DH5_MCH_2441MHz_Ant1_NTNV 7 8DPSK_3DH5_HCH_2480MHz_Ant1_NTNV 8 2. Bandwidth 2.1 Test Result 2.1.1 OBW Mode TX Type Frequency (MHz) Packet Type ANT 99% Occupied Bandwidth (MHz) Verdict Result Limit GFSK SISO 2402 DH5 1 0.855 / Pass 2441 DH5 1 0.837 / Pass 2480 DH5 1 0.834 / Pass Pi/4DQPSK SISO 2402 2DH5 1 1.160 / Pass 2441 2DH5 1 1.146 / Pass 2480 2DH5 1 1.151 / Pass 8DPSK SISO 2402 3DH5 1 1.176 / Pass 2441 3DH5 1 1.166 / Pass 2480 3DH5 1 1.162 / Pass 2.1.2 20dB BW Mode TX Type Frequency (MHz) Packet Type ANT 20dB Bandwidth (MHz) Verdict Result Limit GFSK SISO 2402 DH5 1 0.940 / Pass 2441 DH5 1 0.945 / Pass 2480 DH5 1 0.948 / Pass Pi/4DQPSK SISO 2402 2DH5 1 1.268 / Pass 2441 2DH5 1 1.265 / Pass 2480 2DH5 1 1.264 / Pass 8DPSK SISO 2402 3DH5 1 1.278 / Pass 2441 3DH5 1 1.279 / Pass 2480 3DH5 1 1.279 / Pass 9 2.2 Test Graph 2.2.1 OBW GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV 10 GFSK_DH5_HCH_2480MHz_Ant1_NTNV Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV 11 Pi/4DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV 12 8DPSK_3DH5_LCH_2402MHz_Ant1_NTNV 8DPSK_3DH5_MCH_2441MHz_Ant1_NTNV 13 8DPSK_3DH5_HCH_2480MHz_Ant1_NTNV 14 2.2.2 20dB BW GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV 15 GFSK_DH5_HCH_2480MHz_Ant1_NTNV Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV 16 Pi/4DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV 17 8DPSK_3DH5_LCH_2402MHz_Ant1_NTNV 8DPSK_3DH5_MCH_2441MHz_Ant1_NTNV 18 8DPSK_3DH5_HCH_2480MHz_Ant1_NTNV 19 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Left side: Mode TX Type Frequency (MHz) Packet Type Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit GFSK SISO 2402 DH5 -3.19 <=30 Pass 2441 DH5 -2.60 <=30 Pass 2480 DH5 -2.71 <=30 Pass Pi/4DQPSK SISO 2402 2DH5 -2.32 <=20.97 Pass 2441 2DH5 -1.71 <=20.97 Pass 2480 2DH5 -1.75 <=20.97 Pass 8DPSK SISO 2402 3DH5 -2.02 <=20.97 Pass 2441 3DH5 -1.42 <=20.97 Pass 2480 3DH5 -1.46 <=20.97 Pass Right side: Mode TX Type Frequency (MHz) Packet Type Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit GFSK SISO 2402 DH5 -3.84 <=30 Pass 2441 DH5 -2.04 <=30 Pass 2480 DH5 -2.32 <=30 Pass Pi/4DQPSK SISO 2402 2DH5 -2.74 <=20.97 Pass 2441 2DH5 -1.06 <=20.97 Pass 2480 2DH5 -1.83 <=20.97 Pass 8DPSK SISO 2402 3DH5 -1.37 <=20.97 Pass 2441 3DH5 -1.85 <=20.97 Pass 2480 3DH5 -1.37 <=20.97 Pass 20 4. Carrier Frequency Separation 4.1 Test Result 4.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) Packet Type Channel Separation (MHz) 20dB Bandwidth (MHz) Limit (MHz) Verdict GFSK SISO HOPP DH5 1.014 0.948 >=0.948 Pass Pi/4DQPSK SISO HOPP 2DH5 1.001 1.268 >=0.845 Pass 8DPSK SISO HOPP 3DH5 1.015 1.279 >=0.853 Pass 21 4.2 Test Graph 4.2.1 Ant1 GFSK_DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV 22 8DPSK_3DH5_HOPP_Ant1_NTNV 23 5. Number of Hopping Frequencies 5.1 Test Result 5.1.1 HoppNum Mode TX Type Frequency (MHz) Packet Type Num of Hopping Frequencies Verdict ANT1 Limit GFSK SISO HOPP DH5 79 >=15 Pass Pi/4DQPSK SISO HOPP 2DH5 79 >=15 Pass 8DPSK SISO HOPP 3DH5 79 >=15 Pass 24 5.2 Test Graph 5.2.1 HoppNum GFSK_DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV 25 8DPSK_3DH5_HOPP_Ant1_NTNV 26 6. Time of Occupancy (Dwell Time) 6.1 Test Result 6.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) Packet Type Duration of Single Pulse (ms) Observation Period (s) Num of Pulse in Observation Period Dwell Time (ms) Limit (ms) Verdict GFSK SISO HOPP DH1 0.410 31.600 319 130.790 <=400 Pass DH3 1.670 31.600 155 258.850 <=400 Pass DH5 2.918 31.600 112 326.816 <=400 Pass Pi/4DQPSK SISO HOPP 2DH1 0.420 31.600 320 134.400 <=400 Pass 2DH3 1.672 31.600 153 255.816 <=400 Pass 2DH5 2.924 31.600 104 304.096 <=400 Pass 8DPSK SISO HOPP 3DH1 0.420 31.600 320 134.400 <=400 Pass 3DH3 1.674 31.600 161 269.514 <=400 Pass 3DH5 2.924 31.600 114 333.336 <=400 Pass 27 6.2 Test Graph 6.2.1 Ant1 GFSK_DH1_HOPP_Ant1_NTNV GFSK_DH1_HOPP_Ant1_NTNV 28 GFSK_DH3_HOPP_Ant1_NTNV GFSK_DH3_HOPP_Ant1_NTNV 29 GFSK_DH5_HOPP_Ant1_NTNV GFSK_DH5_HOPP_Ant1_NTNV 30 Pi/4DQPSK_2DH1_HOPP_Ant1_NTNV Pi/4DQPSK_2DH1_HOPP_Ant1_NTNV 31 Pi/4DQPSK_2DH3_HOPP_Ant1_NTNV Pi/4DQPSK_2DH3_HOPP_Ant1_NTNV 32 Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV 33 8DPSK_3DH1_HOPP_Ant1_NTNV 8DPSK_3DH1_HOPP_Ant1_NTNV 34 8DPSK_3DH3_HOPP_Ant1_NTNV 8DPSK_3DH3_HOPP_Ant1_NTNV 35 8DPSK_3DH5_HOPP_Ant1_NTNV 8DPSK_3DH5_HOPP_Ant1_NTNV 36 7. Unwanted Emissions In Non-restricted Frequency Bands 7.1 Test Result 7.1.1 Ref Mode TX Type Frequency (MHz) Packet Type ANT Level of Reference (dBm) GFSK SISO 2402 DH5 1 -3.46 2441 DH5 1 -2.68 2480 DH5 1 -2.95 HOPP DH5 1 -2.65 -2.65 Pi/4DQPSK SISO 2402 2DH5 1 -3.23 2441 2DH5 1 -2.62 2480 2DH5 1 -2.85 HOPP 2DH5 1 -2.46 -2.46 8DPSK SISO 2402 3DH5 1 -3.43 2441 3DH5 1 -2.81 2480 3DH5 1 -2.86 HOPP 3DH5 1 -2.55 -2.55 Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2020, the channel contains the maximum PSD level was used to establish the reference level. 7.1.2 CSE Mode TX Type Frequency (MHz) Packet Type ANT Level of Reference (dBm)…

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Shenzhen HTT Technology Co., Ltd. Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. .................... : FCC ID. ........................................... : HTT202511276F01 2BRD9-M142 Compiled by ( position+printed name+signature) . : File administrators Supervised by ( position+printed name+signature) . : Project Engineer Approved by ( position+printed name+signature) . : RF Manager Date of issue .................................... : Nov. 18, 2025 Testing Laboratory Name .............. : Shenzhen HTT Technology Co.,Ltd. Address ............................................ : 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao’an District, Shenzhen, Guangdong, China Applicant’s name ........................... : YUEHANG INDUSTRIAL LIMITED Address ............................................ : RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong,China Test specification ........................... : Standard ........................................... : FCC Part 15.247 Shenzhen HTT Technology Co.,Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HTT Technology Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HTT 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. Test item description ..................... : TWS Wireless earphone Trade Mark ....................................... : N/A Manufacturer .................................. : YUEHANG INDUSTRIAL LIMITED Model/Type reference ...................... : M142 Listed Models ................................... : M141,M130,M134,M127,M122 Modulation ....................................... : GFSK, Π/4DQPSK, 8DPSK Frequency ......................................... From 2402MHz to 2480MHz Ratings ............................................. : Headphone battery capacity:3.7V/40mAh (polymer battery) Charging bin battery capacity:3.7V/400mAh (polymer battery) Charging interface :USB Type-C Result ............................................... : PASS Report No.: HTT202511276F01 Page 2 of 30 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China T E S T R E P O R T Equipment under Test : TWS Wireless earphone Model /Type : M142 Listed Models : M141,M130,M134,M127,M122 Applicant : YUEHANG INDUSTRIAL LIMITED Address : RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong,China Manufacturer : YUEHANG INDUSTRIAL LIMITED Address : RM 1904A19/F.LUCKY COMMERCIAL CENTRENO.103 DESVOEUX ROAD WEST, SHEUNG WAN Central and Western District, Hong Kong Island, Hong Kong,China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: HTT202511276F01 Page 3 of 30 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Contents 1 TEST STANDARDS .......................................................................................................................................... 4 2 SUMMARY ........................................................................................................................................................ 5 2.1 General Remarks .................................................................................................................................... 5 2.2 Product Description ...............…

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