2BHBQYJ-08Intelligent Bluetooth audio system

FCC Warning This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any inte rference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: 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 reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interferenceto radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference 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 is connected. · Consult the dealer or an experienced radio/TV technician for help. Radiation Exposure Statement The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

Dongguan Yixin Mould Co. , Ltd. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 7/3/2024 U.S. Agent Designation Dongguan Yixin Mould Co. , Ltd. acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: 2BHBQYJ-08): Name and company of U.S. agent: RGA Top Race US LLC Physical U.S. address of agent: 801 Barton Springs Road Austin TEXAS 78704 USA FRN of U.S. agent: 0033871963 Email address of U.S. agent: [email protected] RGA Top Race US LLC acknowledges their obligation to accept service of process on behalf of Dongguan Yixin Mould Co. , Ltd. Dongguan Yixin Mould Co. , Ltd. with the FRN 0035618487 accepts its obligation 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. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature Yicheng ZHou General manager Dongguan Yixin Mould Co. , Ltd. Signature Sindy Au manager RGA Top Race US LLC 48_[mo del] US_Agent_2.911(d)(7) - U, V05

Covered Equipment Identification Letter For Certification Service in the USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Section 2.911(d)(5)(ii) of the Commission’s Rules (47 C.F.R.) we attest as follows: We, applicant Company Name: Dongguan Yixin Mould Co., Ltd. Address: Room 102, No. 17 Lianhe Road, Chang’an Town, Dongguan City, Guangdong Province, China Phone: +86-13763279779 certify that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. If you have any questions, please feel free to contact us at the address shown below. Sincerely, Signature Date:2024-07-03 Printed Name of Signee / Title: Yicheng Zhou / General Manager Company: Dongguan Yixin Mould Co., Ltd. Address: Room 102, No. 17 Lianhe Road, Chang’an Town, Dongguan City, Guangdong Province, China Phone: +86-13763279779 Fax: N/A Email: [email protected]

Covered Equipment Attestation Letter For Certification Service in the USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Section 2.911(d)(5)(i)-(ii) of the Commission’s Rules (47 C.F.R.) we attest as follows for the product listed below: FCC ID Model name 2BHBQYJ-08 YJ-08, YJ-03, YJ-05, YJ-07, YJ-09, YJ-13, YJ-15, YJ-18 We, applicant Company Name: Dongguan Yixin Mould Co., Ltd. Address: Room 102, No. 17 Lianhe Road, Chang’an Town, Dongguan City, Guangdong Province, China Phone: +86-13763279779 certify 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. If you have any questions, please feel free to contact us at the address shown below. Sincerely, Signature Date:2024-07-03 Printed Name of Signee / Title: Yicheng Zhou / General Manager Company: Dongguan Yixin Mould Co., Ltd. Address: Room 102, No. 17 Lianhe Road, Chang’an Town, Dongguan City, Guangdong Province, China Phone: +86-13763279779 Fax: N/A Email: [email protected]

Confidentiality Request Letter For Certification Service in the USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we request confidentiality for the documentation of the following products: FCC ID Model name 2BHBQYJ-08 YJ-08, YJ-03, YJ-05, YJ-07, YJ-09, YJ-13, YJ-15, YJ-18 For the products listed above, we request permanent confidentiality for all applicable exhibits as there are: • the Operational Description • the Block Diagram • the Schematics • the Part List • the Tune up Information The above listed exhibits contain trade secrets and proprietary information that could be of benefit to our competitors. If you have any questions, please feel free to contact us at the address shown below. Sincerely, Signature Date:2024-07-03 Printed Name of Signee / Title: Yicheng Zhou / General Manager Company: Dongguan Yixin Mould Co., Ltd. Address: Room 102, No. 17 Lianhe Road, Chang’an Town, Dongguan City, Guangdong Province, China Phone: +86-13763279779 Fax: N/A Email: [email protected]

Dongguan Yixin Mould Co., Ltd. Room 102, No. 17 Lianhe Road, Chang'an Town, Dongguan City, Guangdong Province, China Date: July 3, 2024 FCC ID: 2BHBQYJ-08 Model Number: YJ-08, YJ-03, YJ-05, YJ-07, YJ-09, YJ-13, YJ-15, YJ-18 To: Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21048 To Whom It May Concern, We, Dongguan Yixin Mould Co., Ltd. hereby declare that our product (Intelligent Bluetooth audio system) Model Number: YJ-08, YJ-03, YJ-05, YJ-07, YJ-09, YJ-13, YJ-15, YJ-18 board, Schematic, Hardware version, Software version, structure and internal photos are same, named differently due to marketing purposes. Should you have any questions or comments regarding this matter, please have my best attention. Sincerely, (Signed) Name/Title: Yicheng Zhou / General Manager Company: Dongguan Yixin Mould Co., Ltd. Address: Room 102, No. 17 Lianhe Road, Chang'an Town, Dongguan City, Guangdong Province, China Phone: +86-13763279779 Fax: N/A Email: [email protected]

Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 4 External Photos Fig. 1 Fig. 2 Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 4 Fig. 3 Fig. 4 Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 4 Fig. 5 Fig. 6 Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 4 Fig. 7

Page 1 of 1 FCC ID: 2BHBQYJ-08 LABEL AND LOCATION (Size: L3.0cm x 2.0cm) Label Location Product name: Intelligent Bluetooth audio system Model:YJ-08 FCC ID: 2BHBQYJ-08

Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 3 Internal Photos Fig. 1 Fig. 2 Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 3 Fig. 3 Fig. 4 Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 3 Fig. 5 Fig. 6 BT ANT

Page 1 of 5 FCC ID:2BHBQYJ-08 FCC RF Exposure Evaluation 1. Product Information Product Name: Intelligent Bluetooth audio system Trademark N/A Model No.: YJ-08,YJ-03,YJ-05,YJ-07,YJ-09,YJ-13,YJ-15,YJ-18 Model Difference PCB board, structure and internal of these model(s) are the same, So no additional models were tested. BT Version: 5.4 Operation Frequency: 2402~2480MHz Channel numbers: 79 Channels Channel separation: 1/2/3M Modulation technology: GFSK ,π/4 DQPSK, 8DPSK Antenna Type: Internal Antenna Antenna gain: 1.7dBi Power supply: Input: DC 12V,2A DC 3.7V by Rechargeable Li-ion Battery Page 2 of 5 FCC ID:2BHBQYJ-08 2. Evaluation method and Limit According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 Standalone SAR test exclusion considerations: “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, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.“ [(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 • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to f) in section 4.1 is applied to determine SAR test exclusion. When one of the following test exclusion conditions is satisfied for all combinations of simultaneous transmission configurations, further equipment approval is not required to incorporate transmitter modules in host devices that operate in the mixed mobile and portable host platform exposure conditions. The grantee is responsible for documenting this according to Class I permissive change requirements. Antennas that qualify for standalone SAR test exclusion must apply the estimated standalone SAR to determine simultaneous transmission test exclusion. a) The [∑ of (the highest measured or estimated SAR for each standalone antenna configuration, adjusted for maximum tune-up tolerance) / 1.6 W/kg] + [∑ of MPE ratios] is ≤ 1.0. b)The SAR to peak location separation ratios of all simultaneously transmitting antenna pairs operating in portable device exposure conditions are all ≤ 0.04, and the [∑ of MPE ratios] is ≤ 1.0. Page 3 of 5 FCC ID:2BHBQYJ-08 3. Refer Evaluation Method 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 publication 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies. FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits. FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices Page 4 of 5 FCC ID:2BHBQYJ-08 4. Conducted Power Results <BT> Mode Test Channel Peak Output Power (dBm) LIMIT (dBm) GFSK CH00 -0.51 30.00 CH39 -0.3 30.00 CH78 -0.01 30.00 π/4 DQPSK CH00 -1.06 20.96 CH39 -0.64 20.96 CH78 -0.24 20.96 8DPSK CH00 -0.93 20.96 CH39 -0.4 20.96 CH78 -0.13 20.96 5. Manufacturing Tolerance <BT> GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 π/4DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) -1.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 8DPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 Page 5 of 5 FCC ID:2BHBQYJ-08 6. Evaluation Results 6.1 Standalone Evaluation Band/Mode Frequ ency (GHz) Antenna Distance (mm) RF output power SAR Test Exclusion Threshold SAR Test Exclusion dBm mW BT GFSK 2.480 5 1.0 1.2589 0.3965< 3.0 Yes Remark: 1. Output power including tune up tolerance; 2. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to f) in section 4.1 is applied to determine SAR test exclusion. 6.2 Simultaneous Transmission for SAR Exclusion The sample support one BT modular. No need consider simultaneous transmission. 7. Conclusion The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SA…

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Product specification Quick Reference Date All the technical data and information contained herein are subject to change without prior notice Antenna Layout &module on the system board AntennaGain GainTable Antenna module on the system board Frequency2.45GHz*1 Ant. Port Input Pwr. (dBm)0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm)-2.3 (Input pwr – loss pwr) Peak EIRP(dBm)1.3 Directivity (dBi)1(all direction antenna) Efficiency (dB)-2.3 (58.5%) Gain (dBi) 1.7 (Peak Gain XY-plane) Maximum Power (dBm)1.3 (XY-plane) Minimum Power (dBm)-4(XY-plane) Avg. Power (dBm)-0.5(XY-plane) Max/Min Ratio (dB)5.3(XY-plane) Max/Avg Ratio (dB)1.8(XY-plane) Min/Avg Ratio(dB)-3.5(XY-plane) Average Gain (dB)-0.5 (Avg Gain XY-plane) Unit in dBi @2.44GHz XY-planeXZ-planeYZ-planeEfficiency PeakAvg. PeakAvg.PeakAvg. Module Board 1.3-0.51.7-3.81.1-3.058.5% SHENZHEN ZEALOT DIGITAL TECHNOLOGY CO., LTD 401, 501, building 3, NO.8, Yong Tai Road, east District, BaiShi xia Community, Fu Yong street, BaoAn District, ShenZhen, China ReturnLoss TheEnvironmentofAntennaRadiationPattern 3Dradiationpatterndiagram XY-planeXZ-planeYZ-plane

Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20240202065E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 73 FCC Part 15C Test Report FCC ID: 2BHBQYJ-08 Applicant: Dongguan Yixin Mould Co. , Ltd. Address: Room 102, No. 17 Lianhe Road, Chang’an Town, Dongguan City, Guangdong Province Manufacturer: Dongguan Yixin Mould Co. , Ltd. Address: Room 102, No. 17 Lianhe Road, Chang’an Town, Dongguan City, Guangdong Province EUT: Intelligent Bluetooth audio system Trade Mark: N/A Model Number: YJ-08,YJ-03,YJ-05,YJ-07,YJ-09,YJ-13,YJ-15,YJ-18 Date of Receipt: June. 19,2024 Test Date: June. 19, 2024 - June. 30, 2024 Date of Report: June. 30, 2024 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Building C, Shuanghuan, No.8, Baoqing Road, Baolong Industrial Zone, Baolong Street, Longgang District, Shenzhen, Guangdong, China Applicable Standards: FCC PART 15 C 15.247 ANSI C63.10:2013 Test Result: Pass Report Number: DL-20240202065E Prepared (Engineer): Alisa Song Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20240202065E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 73 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.247) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS 15.247(c) Radiated Spurious Emission PASS 15.205 Band Edge Emission PASS 15.247(b)(1) Peak Output Power PASS 15.247(a)(iii) Number of Hopping Frequency PASS 15.247(a)(iii) Dwell Time PASS 15.247(a)(1) Bandwidth PASS 15.247(a)(1) Hopping Channel Separation PASS 15.203 Antenna Requirement PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report 1.1 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2，providing a level of confidence of approximately 95 %。 No. Item Uncertainty 1 Conducted Emission Test ±2.56dB 2 RF power,conducted ±0.42dB 3 Spurious emissions,conducted ±2.76dB 4 All emissions,radiated(<1G) ±3.65dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20240202065E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 73 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF EUT Product Name: Intelligent Bluetooth audio system Trademark N/A Model No.: YJ-08,YJ-03,YJ-05,YJ-07,YJ-09,YJ-13,YJ-15,YJ-18 Model Difference PCB board, structure and internal of these model(s) are the same, So no additional models were tested. BT Version: 5.4 Operation Frequency: 2402~2480MHz Channel numbers: 79 Channels Channel separation: 1/2/3M Modulation technology: GFSK ,π/4 DQPSK, 8DPSK Antenna Type: Internal Antenna Antenna gain: 1.7dBi Power supply: Input: DC 12V,2A DC 3.7V by Rechargeable Li-ion Battery Note: 1.For a more detailed features description, please refer to the manufacturer’s specifications or the User's Manual. 2.The EUT’s all information provided by client. Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20240202065E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 73 2. 2.2 DESCRIPTION OF TEST MODES To investigate the maximum EMI emission characteristics generates from EUT, the test system was pre-scanning tested base on the consideration of following EUT operation mode or test configuration mode which possible have effect on EMI emission level. Each of these EUT operation mode(s) or test configuration mode(s) mentioned above was evaluated respectively. Pretest Mode Description Mode 1 CH00 GFSK,π/4 DQPSK,8DPSK Mode 2 CH39 Mode 3 CH78 Mode 4 Link Mode For Conducted & Radiated Emission Final Test Mode Description Mode 1 CH00 GFSK,π/4 DQPSK,8DPSK Mode 2 CH39 Mode 3 CH78 Mode 4 Link Mode Note: (1) The measurements are performed at the highest, middle, lowest available channels. Channel List Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 00 2402 27 2429 54 2456 01 2403 28 2430 55 2457 02 2404 29 2431 56 2458 ~ ~ ~ ~ ~ ~ 08 2410 35 2437 62 2464 09 2411 36 2438 63 2465 10 2412 37 2439 64 2466 11 2413 38 2441 65 2467 12 2414 39 2441 66 2468 13 2415 40 2442 67 2469 ~ ~ ~ ~ ~ ~ 14 2416 41 2443 68 2470 22 2424 49 2451 76 2478 23 2425 50 2452 77 2479 24 2426 51 2453 78 2480 25 2427 52 2454 26 2428 53 2455 Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20240202065E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 5 of 73 E-1 EUT E-1 EUT 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED Radiated Spurious Emission Test C1 AC Mains Conducted Spurious Emission Test C1 AC Mains 2.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) The EUT has been tested as an independent unit together with other necessary accessories or support units. The following support units or accessories were used to form a representative test configuration during the tests. Item Equipment Model/Type No. Series No. Note E-1 E-1 Item Shielded Type Ferrite Core Length Note C1 Note: (1) For detachable type I/O cable should be specified the length in cm in『Length』column. 2.5 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING During testing, channel & power controlling software provided by the customer was used to control the operating channel as well as the output power level. The RF output power selection is for the setting of RF output power expected by the customer and is going to be fixed on the end product. Test software Version Test program: BT_Tool Frequency 2402 MHz 2441 MHz 2480 MHz Power Setting of Softwave 10 10 10 Shenzhen DL Testing Technology Co., Ltd…

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Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 2 Test setup Photos Radiated Measurement Photos Shenzhen DL Testing Technology Co., Ltd. FCC ID:2BHBQYJ-08 Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 2 Conducted Measurement Photos