2BQ6U-J19Wireless Speaker

Dongguan Zichen Electronics Co., Ltd Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [October 15, 2025] U.S. Agent Designation [Dongguan Zichen Electronics 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: 2BQ6U-J19 Name and company of U.S. agent: [GLOCERTS TECHNOLOGY INC] Physical U.S. address of agent: [19784 SUNKISSED RIDGE DR, RIVERSIDE, CA 92507] FRN of U.S. agent: [0036339737] Email address of U.S. agent: [[email protected]] Telephone of U.S.agent: (626) 588-8039 [GLOCERTS TECHNOLOGY INC] acknowledges their obligation to accept service of process on behalf of [Dongguan Zichen Electronics Co., Ltd]. [Dongguan Zichen Electronics Co., Ltd] with the FRN [0037327525] accepts its obligation to maintain an agent for service of process in the United States for no less than 1 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. Sincerely, Signature Signature [Jiang Yuran] [Huiying Fan] [Manager] [Director] [Dongguan Zichen Electronics Co., Ltd] [GLOCERTS TECHNOLOGY INC]

Dongguan Zichen Electronics Co., Ltd (October 14, 2025) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2BQ6U-J19 [Dongguan Zichen Electronics Co., Ltd] (“the applicant”) 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name) Jiang Yuran Dongguan Zichen Electronics Co., Ltd (October 14, 2025) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2BQ6U-J19 [Dongguan Zichen Electronics Co., Ltd] (“the applicant”) certifies 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. Sincerely, (Applicant signature) (Applicant printed name) Jiang Yuran

Dongguan Zichen Electronics Co., Ltd Model Difference Data：October 14, 2025 Product description: Wireless Speaker Model name: J19, J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J14, J15, J16, J17, J18, J20 Trade Name: N/A FCC ID: 2BQ6U-J19 All the model are the same circuit and RF module, only the name is different. Regards Sincerely Client’s signature : Client’s name / title : Jiang Yuran（Manager） Contact information / address：Room 301, Building 1, No. 265 Tai'an Road (Humen Section), Humen Town, Dongguan City, Guangdong Province

Dongguan Zichen Electronics Co., Ltd (October 14, 2025) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Wireless Speaker / J19, J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J14, J15, J16, J17, J18, J20 / FCC ID: 2BQ6U-J19) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No required to be submitted with this application be permanently withheld from public review. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Signature: Name: Jiang Yuran Title: Manager

Dongguan Zichen Electronics Co., Ltd (October 14, 2025) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen CTB Testing Technology Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Signature: Name: Jiang Yuran Title: Manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: J19 External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 4

Model NO: J19 FCC ID:2BQ6U-J19 Input:DC5V 500mA Capacity:600mAh 2.22Wh MADE IN CHINA Dongguan Zichen Electronics Co., Ltd.

Shenzhen CTB Testing Co., Ltd. FCC ID:2BQ6U-J19 Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]·[√f(GHZ)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where: • 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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. EDR: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 -3.648 0.43 -3±1 -2.00 0.63 <5 0.19558 3.00 YES 2.441 -3.62 0.43 -3±1 -2.00 0.63 <5 0.19716 3.00 YES 2.480 -4.575 0.35 -4±1 -3.00 0.50 <5 0.15785 3.00 YES 2.402 -2.902 0.51 -2±1 -1.00 0.79 <5 0.24622 3.00 YES 2.441 -2.918 0.51 -2±1 -1.00 0.79 <5 0.24821 3.00 YES 2.480 -3.843 0.41 -3±1 -2.00 0.63 <5 0.19873 3.00 YES 2.402 -2.624 0.55 -2±1 -1.00 0.79 <5 0.24622 3.00 YES 2.441 -2.618 0.55 -2±1 -1.00 0.79 <5 0.24821 3.00 YES 2.480 -3.576 0.44 -3±1 -2.00 0.63 <5 0.19873 3.00 YES GFSK π /4DQPSK 8DQPSK BLE:1M Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 -3.881 0.41-3±1-2.000.63<50.195583.00YES 2.44 -3.786 0.42-3±1-2.000.63<50.197123.00YES 2.480 -3.56 0.44-3±1-2.000.63<50.198733.00YES GFSK BLE:2M Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 -3.789 0.42-3±1-2.000.63<50.195583.00YES 2.44 -3.657 0.43-3±1-2.000.63<50.197123.00YES 2.480 -3.36 0.46-3±1-2.000.63<50.198733.00YES GFSK Conclusion: For the max result : 0.24821≤ FCC Limit 3.0 for 1g SAR.

Product specification Quick Reference Date ITEM Antenna module on the system board Frequenc Range 2400 ~ 2500MHz Efficiency (dB) 70% Gain (dBi) 1.4 Input Impendence(ohm) 50 Polarization Type Vertical & Horizontal VSW < 2 Antenna Gain Frequency (MHz) Efficiency (dB) Efficiency (%) Gain (dBi) 2402 -1.53 70.34 1.31 2405 -1.52 70.51 1.33 2410 -1.49 71.01 1.33 2415 -1.50 70.82 1.32 2420 -1.46 71.47 1.41 2425 -1.45 71.57 1.37 2430 -1.43 71.89 1.39 2435 -1.44 71.70 1.34 2440 -1.40 72.38 1.47 2441 -1.40 72.44 1.51 2445 -1.40 72.42 1.44 2450 -1.41 72.27 1.50 2455 -1.45 71.60 1.53 2460 -1.44 71.82 1.51 2465 -1.50 70.76 1.54 2470 -1.56 69.76 1.48 2475 -1.59 69.35 1.46 2480 -1.67 68.13 1.47 3D radiation pattern diagram The Environment of Antenna Radiation Pattern

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 41 TEST REPORT Compiled by: Reviewed by: Approved by: Zhou Kui Arron Liu Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Product Name: Wireless Speaker FCC ID: 2BQ6U-J19 Trademark: N/A Model Number: J19, J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J14, J15, J16, J17, J18, J20 Prepared For: Dongguan Zichen Electronics Co., Ltd Address: Room 301, Building 1, No. 265 Tai'an Road (Humen Section), Humen Town, Dongguan City, Guangdong Province Manufacturer: Dongguan Zichen Electronics Co., Ltd Address: Room 301, Building 1, No. 265 Tai'an Road (Humen Section), Humen Town, Dongguan City, Guangdong Province Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Sep. 11, 2025 Sample tested Date: Sep. 11, 2025 to Sep. 27, 2025 Issue Date: Sep. 27, 2025 Report No.: CTB25091111901RF01 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25091111901RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 41 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ........................................................................................................................................ 3 2. TEST SUMMARY ........................................................................................................................... 4 3. MEASUREMENT UNCERTAINTY ................................................................................................. 5 4. PRODUCT INFORMATION AND TEST SETUP ............................................................................ 6 4.1 Product Information .......................................................................................................................... 6 4.2 Test Setup Configuration .................................................................................................................. 6 4.3 Support Equipment........................................................................................................................... 6 4.4 Channel List ..................................................................................................................................... 7 4.5 Test Mode ........................................................................................................................................ 7 4.6 Test Environment ............................................................................................................................. 7 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................................................... 8 5.1 Test Facility ...................................................................................................................................... 8 5.2 Test Instrument Used ....................................................................................................................... 8 6. AC POWER LINE CONDUCTED EMISSION ................................................................................ 11 6.1 Block Diagram Of Test Setup ......................................................................................................... 11 6.2 Limit ................................................................................................................................................ 11 6.3 Test procedure ............................................................................................................................... 11 6.4 Test Result ..................................................................................................................................... 13 7. RADIATED SPURIOUS EMISSION ............................................................................................. 15 7.1 Block Diagram Of Test Setup ......................................................................................................... 15 7.2 Limit ................................................................................................................................................ 15 7.3 Test procedure ............................................................................................................................... 16 7.4 Test Result ..................................................................................................................................... 17 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ............................................... 24 8.1 Block Diagram Of Test Setup ......................................................................................................... 24 8.2 Limit ................................................................................................................................................ 24 8.3 Test procedure ............................................................................................................................... 24 8. 4 Test Result ..................................................................................................................................... 25 9. COUDUCTED OUTPUT POWER ......................…

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Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: J19 Radiated Emission Below 1G Above 1G Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 2 Conducted emissions RF Conducted