2AKMBTWE3BTruly wireless Earphones

PLEASE READ CAREFULLY BEFORE USE. BE SURE TO FOLLOW THESE INSTRUCTIONS. The precautions listed below are to prevent risk of harm to the user and others, as well as to prevent property damage, and to help the user use this unit properly and safely. Be sure to follow these instructions.After reading this manual, be sure to keep it in a safe place where it can be referenced at any time. • Be sure to request inspections or repairs from the dealer where you purchased the unit or from qualified Yamaha service personnel. • Yamaha cannot be held responsible for injury to you or damage of the products caused by improper use or modifications to the unit. • This product is for ordinary homes. Do not use for applications requiring high reliability, such as managing lives, health care or high-value assets. This content indicates “risk of serious injury or death.”Handling • Do not listen with the earphones or headphones while driving or cycling. Also avoid using them where hearing must not be impaired, like at a railroad crossing and a site of construction. Reduced ability to hear surrounding sound increases the risk of an accident.If you notice any abnormality • If any of the following abnormalities occur, stop using the device immediately. - An unusual smell, unusual sound or smoke is emitted from the unit.- Foreign material or water gets into the interior of the unit.- The unit produces an unusual amount of heat. (Risk of burns or injuries)- There is a crack or damage in the unit.- The unit is dropped.Continued use could cause electric shocks, a fire, or malfunctions. Immediately request an inspection or repair from the dealer where you purchased the unit or from qualified Yamaha service personnel. Charging • Be sure to use the supplied USB power cable. Failure to observe the above may cause a fire, burns, or malfunctions. • To charge the charging case, connect it to the USB port of a commercially available USB power adaptor (5 V DC/min. 0.5 A output). Incorrect connection may cause fire, electric shock, or malfunction. For details on charging, refer to this User’s Guide. • When charging this product, plug the commercially-available USB AC adaptor you will use into a power outlet that is within eyesight, where you are able to reach.This is so that you can easily unplug the cable if need be.Even when switched off, this product will not be completely isolated from the power supply unless you unplug it from the power outlet. • Charges within the specified charging temperature range. Charging at a temperature outside the range may cause leakage, overheating, explosion, or damage. • Use the included charging case to charge the earphones. Using a charger other than the included charging case may cause fluid leakage, overheating, rupture or damage. • Do not use the supplied USB power cable for other units. Failure to observe the above may cause a fire, burns, or malfunctions. • Do not cover the unit with blankets, clothing, etc. while being used or charged. It may cause overheating and fire. • Never charge when the unit is wet. Doing so may cause electric shock, fire, or malfunction due to short circuiting. • Do not do anything that could damage the supplied power USB power cable. - Do not place it near a heater.- Do not bend it excessively or alter it. • Leaving a batter y in an extremely hi gh temperature surrounding environment that can result in an explosion or the leakage of flammable liquid or gas. • A battery subjected to extremely low air pressure that may result in an explosion or the leakage of flammable liquid or gas. Do not disassemble • Do not disassemble or modify this unit. Failure to observe this may cause a fire, electric shocks, injury, or malfunctions. Water warning • The charging case and the included USB power cable are not waterproof.• Do not expose the unit to rain, use it near water or in damp or wet conditions, or place on it any containers (such as vases, bottles or glasses) containing liquids which might spill into any openings or places where water may drop. A liquid such as water getting into the unit may cause a fire, electric shocks, or malfunctions. When charging, make sure that the earphones are not wet. If they are wet, wipe them off with a soft, dry cloth. • Do not handle the charging case with wet hands. Failure to observe this may cause electric shocks or malfunctions. Fire warning • Do not place any burning items or open flames near the unit, since they may cause a fire. Handling • Be careful not to drop or apply strong impact to this unit. Failure to observe this may cause electric shocks, a fire, or malfunctions. Wireless unit • Do not use this unit in areas where the use of radio waves is restricted. Radio waves from this unit may affect electro-medical devices. When using this unit in an airplane, follow the instructions of the crew. • Do not use this unit within 15 cm (6 in) of persons with a heart pacemaker implant or a defibrillator implant. Radio waves from this unit may affect electro-medical devices, such as a heart pacemaker implant or defibrillator implant. This content indicates “risk of injury.”Hearing loss • Do not use the unit for a long period of time at a high or uncomfortable volume level. Otherwise, hearing loss may result. Do not exceed 40 hours/week at 80 dB(A) or 5 hours/week at 89 dB(A). If you experience any problems, consult a physician. • Minimize the volume from the device to be connected before connecting the plug. Failing to do so may result in hearing loss or device damage. Handling • Keep small parts out of the reach of infants. Your children may accidentally swallow them. • Do not pull on the included USB power cable while it is connected. Pulling on a connected cable may cause damage. • Do not use the earphones with the eartips detached or broken. Otherwise, injuries or inflammation may result. • In case the earphones irritate your skin, stop use immediately. Continued use may worsen injuries or inflammation. • Securely attach the ear…

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Model UPC EAN/JAN VEH6520 4957812668927 027108959894 BIS: Arial 6

Kingstate Electronics(DongGuan)Co.,Ltd. Date: July 29, 2020 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: FCC ID: 2AKMBTWE3B To whom it may concern: We, the undersigned, hereby authorize SGS-CSTC Standards Technical Services Co., Ltd. (SGS) Shenzhen Branch and Keny Xu in SGS-CSTC Standards Technical Services Co., Ltd. (SGS) Shenzhen Branch to act on our behalf in all manners relating to application for equipment authorization with respect to the FCC ID above, including signing of all documents relating to these matters. Any and all acts carried out by the agent on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Where our agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by SGS North America, Inc., still resides with Kingstate Electronics(DongGuan)Co.,Ltd. This authorization is valid until further written notice from the applicant. Sincerely, Print Name: Jason Guo Title: Engineer Signature: On behalf of Company: Kingstate Electronics(DongGuan)Co.,Ltd. Telephone: 86-769-89212688 E-mail: [email protected]

Kingstate Electronics(DongGuan)Co.,Ltd. To: SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia United States From: Kingstate Electronics(DongGuan)Co.,Ltd. Shi Chong Industrial Park, Shi Chong Avenue, Xiang Xi Village, Shi Pai Town Dongguan China Regarding: Confidentiality Request regarding application for FCC ID: 2AKMBTWE3B LONG TERM CONFIDENTIALITY Pursuant to 47 CFR Section 0.459 and 0.457 of the commission’s rules, the applicant hereby request confidential treatment of the documents listed below, associated with the certification application referenced above. Schematic(s) Block Diagrams Operational Descriptions The documents above contain proprietary information not released to the public. Public disclosure of this information may prove harmful to the business of the applicant. SHORT TERM CONFIDENTIALITY Additionally, the applicant requests the following documents be held confidential until the device is marketed or 180 days from the grant date, whichever is less. If the device is marketed within aforementioned days of the Grant Date, the applicant will notify the TCB per FCC KDB 726920 D01 Confidentiality Request Procedures. External Photos Internal Photos Test Setup Photos User manual(s) Sincerely, Print Name: Jason Guo Title: Engineer Signature: On behalf of Company: Kingstate Electronics(DongGuan)Co.,Ltd. Telephone: 86-769-89212688 E-mail: [email protected]

Applicant Declaration Applicant Declaration Rev:0.0 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States A pplicant Legal Business Name Kingstate Electronics(DongGuan)Co.,Ltd. Address Shi Chong Industrial Park, Shi Chong Avenue, Xiang Xi Village, Shi Pai Town Dongguan China Grantee Code 2AKMB FCC ID 2AKMBTWE3B Authorized Contact Name Jason Guo Contact Email [email protected] Contact Phone 86-769-89212688 I, the undersigned, certify that I am an authorized signatory for the Applicant and therefore declare; a)in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and beli ef. b) in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations ma de in this appli cation, the Applic ant is responsible for: (1) labeling the equipment with the exact FCC ID as specified in this application, (2) compliance statement labeling pursuant to the applicable rules, (3) compliance of the equipment with the applicable technical rules, c) if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to en sure that production u nits of this equipment will continue to comply with the FCC’s technical requirements. d) in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the res ponsible part y and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. e)in accordance with ISO17065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accept s and agrees to a bide by the post market surveillance requirem ents. (1 ) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing. (2) the Applicant shall make provisions to always have a production sample available upon request by SGS, FCC and/or ISED. (3) the Applicant shall, upon request by SGS, at the Applicant’s expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. f)neither the Applicant nor any party to the application is subject to a denial of Federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a “party” for these purposes. g)the Applicant has read, understood, accepts and agrees to abide by the SGS North America, Inc.(TCB) terms and cond itions. L ink to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-regulations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01130.html Applicant Signature: Date: July 29, 2020 Print Name: Jason Guo Title: Engineer *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database Applicant Declaration Applicant Declaration Rev:0.0 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 1 of 6 External Photos for SZEM2007007054CR FCC ID: 2AKMBTWE3B SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 2 of 6 1 EUT Constructional Details SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 3 of 6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 4 of 6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 5 of 6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 6 of 6

Label placement To Federal Communication Commission Equipment Authorization Branch 7 435 Oakland Mills Road Columbia, MID 21046 For the following product, Product Name: Truly Wireless Earphones Model No.: TW-E3B FCC ID: 2AKMBTWE3B The FCC ID is not affixed on the product itself, but described in the product user manual and the product package/case due to below reasons. Reasons： The product is too small to put the label on it. The Size is below: 27.77mm* 20.03mm*23.82mm Print Name: Keny Xu Title: Manager Signature: Authorized agent for: Kingstate Electronics(DongGuan)Co.,Ltd. Telephone: 86-755-25328629 E-mail: [email protected]

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 1 of 8 Internal Photos for SZEM2007007054CR FCC ID:2AKMBTWE3B SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 2 of 8 1 EUT Constructional Details Antenna SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 3 of 8 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 4 of 8 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 5 of 8 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 6 of 8 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 7 of 8 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 8 of 8

Compliance Certification Services (Kunshan) Inc. Report No.: KSEM200800110301 Page: 1 of 47 FCC SAR TEST REPORT Application No.: KSEM2008001106CR Applicant:Kingstate Electronics(Dongguan)Co.,Ltd Address of Applicant: Shi Chong Industrial Park, Shi Chong Avenue, Xiang Xi Village, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Manufacturer:Kingstate Electronics(Dongguan)Co.,Ltd Address of Manufacturer: Shi Chong Industrial Park, Shi Chong Avenue, Xiang Xi Village, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Factory:Kingstate Electronics(Dongguan)Co.,Ltd Address of Factory: Shi Chong Industrial Park, Shi Chong Avenue, Xiang Xi Village, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Product Name:Truly wireless Earphones Model No.(EUT): TW-E3B Trade mark:YAMAHA FCC ID: 2AKMBTWE3B Standard(s) : FCC 47CFR §2.1093 Date of Receipt: 2020-08-20 Date of Test: 2020-08-26 to 2020-08-26 Date of Issue: 2020-08-28 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. Eric Lin Laboratory Manager The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in this report. If the product in this report is used in any configuration other than that detailed in the report, the manufacturer must ensure the new system complies with all relevant standards. Any mention of SGS International Electrical Approvals or testing done by SGS International Electrical Approvals in connection with, distribution or use of the product described in this report must be approved by SGS International Electrical Approvals in writing. Compliance Certification Services (Kunshan) Inc. Report No.: KSEM200800110301 Page: 2 of 47 REVISION HISTORY Revision Record VersionDescriptionDateRemark 00Original2020-08-28Original Authorized for issue by: Richard.Kong/ Project Engineer Eric.Lin/Reviewer Compliance Certification Services (Kunshan) Inc. Report No.: KSEM200800110301 Page: 3 of 47 TEST SUMMARY Maximum Reported SAR(W/kg) Frequency Band Head Bluetooth0.21 SAR Limited(W/kg)1.6 Compliance Certification Services (Kunshan) Inc. Report No.: KSEM200800110301 Page: 4 of 47 CONTENTS 1GENERAL INFORMATION..............................................................................................................................6 1.1GENERAL DESCRIPTION OF EUT.................................................................................................................6 1.1.1DUT Antenna Locations.......................................................................................................................7 1.2TEST SPECIFICATION..................................................................................................................................8 1.3RF EXPOSURE LIMITS.................................................................................................................................9 1.4TEST LOCATION.......................................................................................................................................10 1.5TEST FACILITY.........................................................................................................................................10 2LABORATORY ENVIRONMENT...................................................................................................................11 3SAR MEASUREMENTS SYSTEM CONFIGURATION.................................................................................12 3.1THE SAR MEASUREMENT SYSTEM............................................................................................................12 3.2ISOTROPIC E-FIELD PROBE EX3DV4.........................................................................................................13 3.3DATA ACQUISITION ELECTRONICS (DAE)...................................................................................................14 3.4SAM TWIN PHANTOM...............................................................................................................................14 3.5ELI PHANTOM..........................................................................................................................................15 3.6DEVICE HOLDER FOR TRANSMITTERS........................................................................................................16 3.7MEASUREMENT PROCEDURE.....................................................................................................................17 3.7.1Scanning procedure...........................................................................................................................17 3.7.2Data Storage......................................................................................................................................19 3.7.3Data Evaluation by SEMCAD............................................................................................................19 4SAR MEASUREMENT VARIABILITY AND UNCERTAINTY........................................................................21 4.1SAR MEASUREMENT VARIABILITY..............................................................................................................21 4.2SAR MEASUREMENT UNCERTAINTY...........................................................................................................22 5DESCRIPTION OF TEST POSITION.............................................................................................................23 5.1HEAD EXPOSURE CONDITION....................................................................................................................23 5.1.1SAM Phantom Shape........................................................................................................................23 5.1.2EUT constructions.............................................................................................................................24 5.1.3Definition of the “cheek” position.....…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 101 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 102 of 132 2. Maximum Conducted Output Power 2.1 Test Result Test Mode Frequency (MHz) Tx Type Measured Peak Output Power (dBm) Limits (dBm) Verdict Ant 1 GFSK 2402 SISO 8.58 30 PASS 2441 SISO 8.79 30 PASS 2480 SISO 8.91 30 PASS Pi/4DQPSK 2402 SISO 10.73 20.97 PASS 2441 SISO 10.80 20.97 PASS 2480 SISO 10.84 20.97 PASS 8DPSK 2402 SISO 11.73 20.97 PASS 2441 SISO 11.54 20.97 PASS 2480 SISO 11.48 20.97 PASS 2.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 103 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 104 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 105 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 106 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 107 of 132 3. Carrier frequency separation 3.1 Test Result Test Mode TX Type ANT No. Channel Separation (MHz) 20dB Bandwidth (MHz) Limits (MHz) Verdict GFSK SISO 1 1.000 0.958 ≥0.958 PASS Pi/4DQPSK SISO 1 1.014 1.344 ≥0.896 PASS 8DPSK SISO 1 1.017 1.308 ≥0.872 PASS 3.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 108 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 109 of 132 4. Number of hopping frequencies 4.1 Test Result Test Mode TX Type ANT No. Num of Hopping Frequencies Limits Verdict GFSK SISO 1 79 ≥15 PASS Pi/4DQPSK SISO 1 79 ≥15 PASS 8DPSK SISO 1 79 ≥15 PASS 4.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 110 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 111 of 132 5. Time of Occupancy (Dwell Time) 5.1 Test Result Test Mode Packet Type TX Type ANT No. Duration of Single Pulse (ms) Obeserv ation Period (s) Num of Pulse in Observation Period Dwell Time (ms) Limits (ms) Verdict GFSK DH1 SISO 1 0.390 31.6 320 124.800 ≤400 PASS DH3 SISO 1 1.645 31.6 160 263.200 ≤400 PASS DH5 SISO 1 2.894 31.6 107 309.658 ≤400 PASS Pi/4DQ PSK 2DH1 SISO 1 0.397 31.6 320 127.040 ≤400 PASS 2DH3 SISO 1 1.653 31.6 160 264.480 ≤400 PASS 2DH5 SISO 1 2.898 31.6 106 307.188 ≤400 PASS 8DPSK 3DH1 SISO 1 0.397 31.6 320 127.040 ≤400 PASS 3DH3 SISO 1 1.650 31.6 160 264.000 ≤400 PASS 3DH5 SISO 1 2.899 31.6 107 310.193 ≤400 PASS 5.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 112 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 113 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 114 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 115 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 116 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 117 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 118 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 119 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 120 of 132 6. Unwanted Emissions in Non-restricted Frequency Bands 6.1 Test Result Test Mode Frequency (MHz) TX Type ANT No. Spurious Conducted Emission (dBm) Limits (dBm) Verdict GFSK 2402 SISO 1 Refer to test graph -11.95 PASS 2441 SISO 1 Refer to test graph -11.95 PASS 2480 SISO 1 Refer to test graph -11.95 PASS Hopping SISO 1 Refer to test graph -11.95 PASS Pi/4DQPSK 2402 SISO 1 Refer to test graph -11.85 PASS 2441 SISO 1 Refer to test graph -11.85 PASS 2480 SISO 1 Refer to test graph -11.85 PASS Hopping SISO 1 Refer to test graph -11.85 PASS 8DPSK 2402 SISO 1 Refer to test graph -11.93 PASS 2441 SISO 1 Refer to test graph -11.93 PASS 2480 SISO 1 Refer to test graph -11.93 PASS Hopping SISO 1 Refer to test graph -11.93 PASS SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 121 of 132 6.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 122 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 123 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 124 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 125 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 126 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 127 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 128 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 129 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 130 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 131 of 132 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 132 of 132 - End of the Report -

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 1 of 132 Keny Xu EMC Laboratory Manager TEST REPORT Application No.: SZEM2007007054CR Applicant: Kingstate Electronics(DongGuan)Co.,Ltd. Address of Applicant: Shi Chong Industrial Park, Shi Chong Avenue, Xiang Xi Village, Shi Pai Town, Dongguan, China. Manufacturer: Kingstate Electronics(DongGuan)Co.,Ltd. Address of Manufacturer: Shi Chong Industrial Park, Shi Chong Avenue, Xiang Xi Village, Shi Pai Town, Dongguan, China. Factory: Kingstate Electronics(DongGuan)Co.,Ltd. Address of Factory: Shi Chong Industrial Park, Shi Chong Avenue, Xiang Xi Village, Shi Pai Town, Dongguan, China. Equipment Under Test (EUT): EUT Name: Truly wireless Earphones Model No.: TW-E3B Trade Mark: YAMAHA FCC ID: 2AKMBTWE3B Standard(s) : 47 CFR Part 15, Subpart C 15.247 Date of Receipt: 2020-07-25 Date of Test: 2020-08-01 to 2020-08-03 Date of Issue: 2020-08-27 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 2 of 132 Revision Record Version Chapter Date Modifier Remark 01 2020-08-27 Original Authorized for issue by: Harry Wu /Project Engineer Eric Fu /Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 3 of 132 2 Test Summary Radio Spectrum Technical Requirement Item Standard Method Requirement Result Antenna Requirement 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.203 & 15.247(b)(4) Pass Other requirements Frequency Hopping Spread Spectrum System Hopping Sequence 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.247(a)(1),(g),(h) Pass Radio Spectrum Matter Part Item Standard Method Requirement Result Conducted Peak Output Power 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 7.8.5 47 CFR Part 15, Subpart C 15.247(b)(1) Pass 20dB Bandwidth 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 7.8.7 47 CFR Part 15, Subpart C 15.247(a)(1) Pass Carrier Frequencies Separation 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 7.8.2 47 CFR Part 15, Subpart C 15.247a(1) Pass Hopping Channel Number 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 7.8.3 47 CFR Part 15, Subpart C 15.247a(1)(iii) Pass Dwell Time 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 7.8.4 47 CFR Part 15, Subpart C 15.247a(1)(iii) Pass Conducted Band Edges Measurement 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 7.8.6 47 CFR Part 15, Subpart C 15.247(d) Pass Conducted Spurious Emissions 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 7.8.8 47 CFR Part 15, Subpart C 15.247(d) Pass Radiated Emissions which fall in the restricted bands 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 6.10.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 6.4,6.5,6.6 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZEM200700705402 Page: 4 of 132 3 Contents Page 1 COVER PAGE ............................................................................................................................................ 1 2 TEST SUMMARY ....................................................................................................................................... 3 3 CONTENTS ................................................................................................................................................ 4 4 GENERAL INFORMATION ........................................................................................................................ 6 4.1 DETAILS OF E.U.T…

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