2BTCB-BIYOS0X61TWS Wireless headset

X61 |Great Sound Quality-Master Tune Bluetooth version: v5.4 Bluetooth connection range:≥10m Make name: BIYOSO X61 Color: gun color, silver Music time: about 5 hours (80%volume) Call time: about 3 hours (80%volume) Headphone standby time:60hours Control method: touch method Channel system: dual-channel Charging input interface: Type-C Frequency response:100Hz~20KHz Audio signal-to-noise ratio: ≥90db Microphone/ mic:-42db±3 Charging input voltage: 5V Charging box battery capacity:3.7V200mAh Charging box battery full time: 1.5 hours Bluetooth operating frequency:2.402GHz-2.480GHz Speaker unit: full -frequency speaker 中13mm@32 ohm Product Features ①The new Bluetooth V5.4 chip has stronger performance and stable performance; supports the Hall switch function,which is more convenient to use; ②Patented products, exquisite appearance, extremely comfortable feel; metal high -gloss charging box, strong and durable; ③Semi -in-ear design, non-destructive high-definition sound quality, comfortable wearing feel, easily grasp the answering call and music play/switching, without delay continuous lines. (1) Pressing function operation Power on/off: open the cover to turn on, close the cover to turn off Play/pause: When playing music, click the touch on any earbuds to pause or play music. Previous song: Double click the left ear multifunction key while playing or pausing music. Next song: Double click the right ear multifunction key while playing or pausing music. Volume Up: Three clicks on the right ear multifunction key. Volume Down:Three clicks on the left ear multifunction key. Voice assistant:After the earbuds were power on, press the touch of any earbuds for about 2 seconds to activate the voice assistant function of the phone (requires the support of the connected phone). Answer a call: When an call incoming, click the touch on any earbuds to answer the call. End call: During a call, click the touch on either earbuds to end the call. Reject call: When an call incoming, hold the touch on any earbuds for about 2 seconds to reject the call. Pairing: open the charging box cover and turn on the headset to automatically enter the pairing state, waiting for the phone to search for BIYOSO X61 to connect. (2) Charging warehouse indicator light 1. The charging box is turned on/off the cover indicator: open/off the green light to light 4 seconds. 2. Put the headset into the charging box indicator: the green light flashes once. 3. Charging the indicator of the charging box: The red light flashes when the Type-C charging cable is connected,and remains steadily lit when fully charged. 4. When charging the headset in the charging case: the green light is long and light, 4 seconds go out. 5. Reminder of low -power charging box: When the charging warehouse is low or closed, the green light flash will be extinguished after the lid is turned on or closed. (3) Bluetooth connection operation 1. The distance between the Bluetooth headset and the mobile phone (or other connection devices) is within a range of 1 meter, the closer the better. 2. Open the charging box, remove the headset, automatically turn on and enter the pairing mode. 3. Open the user's mobile phone Bluetooth function (or other Bluetooth devices) and search or scan. At this time, the mobile phone will search all the nearby Bluetooth settings, click the search name: BIYOSO X61, after successful pairing connection, You can call your phone and listen to songs. Warranty Card Dear user, thank you very much for using the BIYOSO product, Please fill it out carefully and keep it properly. Warranty Policy 1. The postage for returns and exchanges with non quality issues shall be borne by the consumer, and the postage for reshipments shall be borne by the merchant. If there are invoices and gifts, please send them back together. 2. If you purchase from a local store, you can go to the local after-sales service center to enjoy the warranty service provided by our company within one year from the date of purchase. If there is no local after-sales service center, a dealer can be entrusted to provide replacement services. 3. The product you purchased, after being tested and confirmed by our company, can enjoy warranty services according to the following after-sales service commitment schedule; Product Type Service Policy Service Bluetooth Products & Audio Category Product quality reasons within 12 months from the next day of receipt Customer sent for repair Mobile Power Charging Category Product quality reasons within 12 months from the next day of receipt Customer sent for repair Data Cable & Car Holder Class Product quality reasons within 3 months from the next day of receipt Customer sent for repair Note: Random accessories are not covered by warranty Warranty Record Form Dealer Information User information User Name Contact number Mailing Address Email Warranty content Warranty date Non warranty regulations 1. Unauthorized maintenance, misuse, collision, negligence, misuse, accident, modification, or tearing, altering labels, anti-counterfeiting markings; 2. The original serial number label of the product is altered, replaced, or torn 3. The product does not have a serial number, and the product model and number on the quality assurance certificate do not match the actual product; 4. The product exceeds the warranty period specified by our company; 5. Abnormal use of the product causes external damage; 6. External packaging and accompanying gifts, services beyond the products promised by sales personnel, as well as additional configurations and gifts; 7. Improper storage: such as performance damage caused by prolonged exposure of products to abnormal humidity and temperature environments; 8. Failure to follow the operating instructions, misuse of artificial covers, self modification resulting in product damage, or damage caused by force majeure. Our company reserves the right to interpret the after-sales service regulations for this product. Mailbox：info@ biyoso.c…

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Rev 1/26/2023 Dongguan Biyoso Digital Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 12-05-2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BTCB-BIYOS0X61 [Dongguan Biyoso Digital Technology Co., Ltd.] certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. [Dongguan Biyoso Digital Technology Co., Ltd.] certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) (Applicant printed name) Lemon.feng Rev 1/26/2023 Dongguan Biyoso Digital Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 12-05-2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BTCB-BIYOS0X61 [Dongguan Biyoso Digital Technology Co., Ltd.] certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Lemon.feng

Dongguan Biyoso Digital Technology Co., Ltd. U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: December 5, 2025 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BTCB-BIYOS0X61 Dongguan Biyoso Digital Technology Co., Ltd.(“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Dongguan Biyoso Digital Technology Co., Ltd. FRN: 0037683091 Address: Room 701, No. 89 Shipai Longteng Road, Shipai Town, Dongguan City, Guangdong Province, China. Signature: Contact Person: Lemon.feng Tel: 18211307641 Email: [email protected]

Dongguan Biyoso Digital Technology Co., Ltd. Date: December 5, 2025 Product Model Number: Biyoso X61 FCC ID: 2BTCB-BIYOS0X61 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following: • Testing • Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. Contact Listed on FCC Wesbite Signature： By: Lemon.feng Title: Manager Email: [email protected] Telephone: 18211307641 On behalf of: Dongguan Biyoso Digital Technology Co., Ltd.

Dongguan Biyoso Digital Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: December 5, 2025 Subject; Request for Confidentiality FCC ID: 2BTCB-BIYOS0X61 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 Software Security Requirements for UNII devices 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： By: Lemon.feng Title: Manager

2.4GHz 1608 Chip Antenna: RANT0603F245S5 _ Application: WLAN, 802.11b/g, Bluetooth, WLAN, etc... Features SMD, high reliability, ultra Impact, Omni-directional... Part number Information RANT0603F245S5 (A)(B)(C)(D)(E)(F) Electrical Specification Dimension and Terminal Configuration No.Terminal Name 1Feeding/GNG 2GND/Feeding (A)Product TypeChip Antenna (B) Size Code 1.6x0.8mm( ± 0.1mm) (C) MaterialHigh K material (D) Frequency2.4 ~ 2.5GHz (E) Feeding modePIFA & Single Feeding (F) Antenna type Working Frequency Range2400 ~2500 MHz Bandwidth120 MHz (Min.) Peak Gain2.7 dBi (Typ.) Impedance50 Ohm Return loss10 dB ( Min) PolarizationLinear Azimuth BeamwidthOmni-directional Operation Temperature(°C)-40 ~85°C Resistance to Soldering Heats 10sec. ( @ 280°C) TerminationNi / Au (Leadless) Dimension (mm) L 1.60±0.10 W 0.80±0.10 T 0.45±0.10 電話 :13530576606 咏成國際科技有限公司 RAIN International Technology Co., Ltd. Site: Room 709, Building F, Yuxing Technology Industrial Park, Nanchang Third Industrial Zone, Nanchang Community, Xixiang Sub-district, Bao'an District, Shenzhen City TEL: 13530576606 SMD ANT 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ 1 EvaluationBoardReference PCB DimensionUnit :mm ReturnLoss & Radiation 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ TapingSpecifications Reel and TapingSpecification Reel Specification TYPESIZEABCD 16087”4K/Reel 4.0±0.5 4.0 ±213.5 ±0.5178 ±2 TappingSpecification PackagingTypeABWEFGHTψDP PaperType1608 1.90±0.203.50±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.10 1.50±0.10 4.0±0.1 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ ReliabilityTable Test ItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfillthe electrical specification UserSpec. Thermal Shock 1. Preconditioning: 50 ± 10°C/ 1 hr , then keepfor 24 ± 1 hrs at roomtemp. 2. Initialmeasure:Spec:refer Initialspec. 3. Rapidchangeof temperaturetest: -30°Cto +85°C; 100 cycles; 15 minutesat Lowercategorytemperature; 15 minutesat Uppercategorytemperature. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 107 Temperature Cycling 1. Initialmeasure:Spec:refer Initialspec. 2. 100 Cycles(-30°Cto +85°C), SoakMode=1(2 Cycle/hours). 3. Measurementat 24 ± 2Hoursafter test condition. No VisibleDamage. Fulfillthe electrical specification. JESD22 JA104 High Temperature Exposure 1. Initialmeasure:Spec:refer Initialspec. 2. Unpowered;500hours@ T=+85°C. 3. Measurementat 24 ± 2 hoursafter test. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 108 Low Temperature Storage 1. Initialmeasure:Spec:refer Initialspec. 2. Unpowered:500hours@ T= -30°C. 3. Measurementat 24 ± 2 hoursafter test. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 108 Solderability (SMD BottomSide) Dippingmethod: a. Temperature:235 ±5°C b. Dippingtime:3 ±0.5s The soldershouldcover over 95% of the critical area of bottomside. IEC 60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150 ± 10 °C. Preheatingtime:1~2 min. Soldertemperature:260 ± 5°C. Dippingtime:5 ± 0.5s No VisibleDamage.IEC 60384-21/22 4.10 Vibration5g's for 20 min.,12 cycleseachof 3 orientations Note:Use 8"X5"PCB .031"thick 7 securepointson, one long side and 2 securepointsat cornersof oppositesides.Parts mountedwithin2" from any securepoint.Test from 10-2000 Hz. No VisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksin eachdirectionshall be appliedalongthe three mutuallyperpendicularaxesof the test specimen(18 shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4 ft/s Waveform:Half-sine No VisibleDamage.MIL-STD-202 Method213 Humidity Bias 1. Humidity:85% R.H.,Temperature:85 ± 2 °C. 2. Time:500 ± 24 hours. 3. Measurementat 24 ± 2hrs after test condition. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 Method106 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ Board Flex (SMD) 1. Mountingmethod: IR-Reflow.PCB Size (L:100× W:40× T:1.6mm) 2. Applythe load in directionof the arrowuntil bendingreaches 2 mm. No VisibleDamage.AEC-Q200 005 AdhesionForceof 1.8Kgfor 60 seconds.No VisibleDamage Magnificationof 20X or greatermay be employed for inspectionof the mechanicalintegrityof the devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Any applicablemethodusingx10 magnification,micrometers, calipers,gauges,contourprojectors,or othermeasuring equipment,capableof determiningthe actualspecimen dimensions. In accordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 12019/03/01New Datasheet 22020/02/22Add 2D radiationcharacteristic

Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report Annex A. EUT External Photos Model: Biyoso X61 EUT View 1 EUT View 2 Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report EUT View 3 EUT View 4 Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report EUT View 5 EUT View 6 Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report EUT View 7

Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report Annex D. Label and Information FCC Label Sample FCC Labe Size: 0.5cm x 0.5cm FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location Label Location

Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report Annex B. EUT Internal Photos Model: Biyoso X61 EUT Internal View 1 EUT Internal View 2 SMD ANT SMD ANT Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report EUT Internal View 3 EUT Internal View 4 Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report EUT Internal View 5

FCC ID: 2BTCB-BIYOS0X61 RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093，Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(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 Here, The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. For BR+EDR Max Conducted Power(dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Max Power(mW) Frequency(MHz) Min. distance(mm) Calc. thresholds limit -2.17 -2(±1) 1 0.79 2402 5 0.2448745 3.0 So a SAR test is not required

Report No: SSP25110770-1E FCC Test Report Page 1 of 46 FCC TEST REPORT FCC ID: 2BTCB-BIYOS0X61 Report No. : SSP25110770-1E Applicant : Dongguan Biyoso Digital Technology Co., Ltd. Product Name : TWS Wireless headset Model Name : Biyoso X61 Test Standard : FCC Part 15.247 Date of Issue : 2025-12-01 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. Report No: SSP25110770-1E FCC Test Report Page 2 of 46 Test Report Basic Information Applicant..................................: Dongguan Biyoso Digital Technology Co., Ltd. Address of Applicant...............: Room 701, No. 89 Shipai Longteng Road, Shipai Town, Dongguan City, Guangdong Province, China. Manufacturer..........................: DONGGUAN GENAI TECHNOLOGY CO., LTD Address of Manufacturer........: Room 901, NO.2BuilDing, NO.1, JiaopingRoad, TangxiaTown, Dongguan, City, Guangdong Province, China. Product Name.........................: TWS Wireless headset Brand Name.............................: - Main Model..............................: Biyoso X61 Series Models..........................: - Test Standard..........................: FCC Part 15 Subpart C ANSI C63.4-2014 ANSI C63.10-2020 Date of Test .............................: 2025-11-26 to 2025-11-28 Test Result...............................: PASS Tested By ................................: (Colin Chen) Reviewed By............................: (Lorzix Luo) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. Report No: SSP25110770-1E FCC Test Report Page 3 of 46 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................6 1.3 Compliance Standards ...........................................................................................................................................7 1.4 Test Facilities ........................................................................................................................................................7 1.5 List of Measurement Instruments ..........................................................................................................................8 1.6 Measurement Uncertainty .....................................................................................................................................9 2. Summary of Test Results ........................................................................................................................................... 10 3. Antenna Requirement ............................................................................................................................................... 11 3.1 Standard and Limit.............................................................................................................................................. 11 3.2 Test Result .......................................................................................................................................................... 11 4. Conducted Emissions ................................................................................................................................................ 12 4.1 Standard and Limit.............................................................................................................................................. 12 4.2 Test Procedure.................................................................................................................................................... 12 4.3 Test Data and Results .......................................................................................................................................... 13 5. Radiated Emissions ................................................................................................................................................... 16 5.1 Standard and Limit.............................................................................................................................................. 16 5.2 Test Procedure.................................................................................................................................................... 16 5.3 Test Data and Results .......................................................................................................................................... 18 6. Band-edge Emissions(Radiated) ............................................................................................................................... 22 6.1 Standard and Limit.............................................................................................................................................. 22 6.2 Test Procedure.................................................................................................................................................... 22 6.3 Test Data and Results .......................................................................................................................................... 22 7. Frequen…

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Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report Annex C. Test Photos Conducted Emission Test View 1 Radiated Emission Test View Below 1GHz (Left earphone) Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report Radiated Emission Test View Above 1GHz (Left earphone) Report No: SSP25110770-1E FCC ID: 2BTCB-BIYOS0X61 Annex of Test Report