2BXLS-V9PLUSMarine Audio

Zhengzhou Damulin Electronic Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [August 7, 2026] U.S. Agent Designation [Zhengzhou Damulin Electronic Technology 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: 2BXLS-V9PLUS 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 [Zhengzhou Damulin Electronic Technology Co., Ltd.]. [Zhengzhou Damulin Electronic Technology Co., Ltd.] with the FRN [0038752176] 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 [Lisa Lin] [Huiying Fan] [manager] [Director] [Zhengzhou Damulin Electronic Technology Co., Ltd.] [GLOCERTS TECHNOLOGY INC]

Zhengzhou Damulin Electronic Technology Co., Ltd. (August 7, 2026) 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:2BXLS-V9PLUS [Zhengzhou Damulin Electronic Technology 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)Lisa Lin Zhengzhou Damulin Electronic Technology Co., Ltd. (August 7, 2026) 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:2BXLS-V9PLUS [Zhengzhou Damulin Electronic Technology 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)Lisa Lin

Zhengzhou Damulin Electronic Technology Co., Ltd. (August 7, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Wireless Headset / Cyclones V9 Plus / FCC ID: 2BXLS-V9PLUS ) 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: Lisa Lin Title: manager

Zhengzhou Damulin Electronic Technology Co., Ltd. (August 7, 2026) 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: Lisa Lin Title: manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: Cyclones V9 Plus 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

FCC ID LABEL: Label Location: FCC ID: 2BXLS-V9PLUS Model No.: Cyclones V9 Plus

Shenzhen CTB Testing Technology Co., Ltd. FCC ID:2BXLS-V9PLUS 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 0.64 1.160±11.001.26<50.390233.00YES 2.441 1.03 1.271±12.001.58<50.495243.00YES 2.480 0.34 1.080±11.001.26<50.396513.00YES GFSK Conclusion: For the max result : 0.49524≤ FCC Limit 3.0 for 1g SAR.

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 49 TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng 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. The tested sample(s) and the sample information are provided by the applicant. The authenticity, accuracy, and completeness of the provided information are the sole responsibility of the applicant. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The result decision rules of our laboratory are based solely on the direct comparison between the actual measured values of test results and the standard limits, without considering the measurement uncertainty.“” indicates the testing items were fulfilled by subcontracted lab. “ ” indicates the items are not in CNAS accreditation scope. Test item description: Wireless Headset FCC ID: 2BXLS-V9PLUS Trademark(s): JINMS Model/Type reference: Cyclones V9 Plus Applicant’s name: Zhengzhou Damulin Electronic Technology Co., Ltd. Address: 3F-A01-1, 3rd Floor, Buqingcheng, No. 71 Wenhua Road, Jinshui District, Zhengzhou,China Manufacturer: Dongguan YinJiaYouPing Electronics Co., Ltd Address: Room 603, No.58 Huangtang Xianlin 1st Road, Hengli Town, Dongguan City, Guangdong Province, P.R.China 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: Jul. 13, 2026 Sample tested Date: Jul. 13, 2026 to Jul. 25, 2026 Issue Date: Jul. 25, 2026 Report No.: CTB26071303501RF01 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.: CTB26071303501RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 49 TABLE OF CONTENT Test Report Declaration Page 1. VERSION .......................................................................... 4 2. TEST SUMMARY ................................................................... 5 3. MEASUREMENT UNCERTAINTY ..................................................... 6 4. PRODUCT INFORMATION AND TEST SETUP .......................................... 7 4.1 Product Information .................................................................... 7 4.2 Test Setup Configuration ............................................................... 7 4.3 Support Equipment .................................................................... 7 4.4 Channel List .......................................................................... 8 4.5 Test Mode ............................................................................ 8 4.6 Test Environment ...................................................................... 8 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................... 9 5.1 Test Facility ........................................................................... 9 5.2 Test Instrument Used .................................................................. 9 6. AC POWER LINE CONDUCTED EMISSION ............................................ 12 6.1 Block Diagram Of Test Setup .......................................................... 12 6.2 Limit ................................................................................ 12 6.3 Test procedure ....................................................................... 12 6.4 Test Result .......................................................................... 14 7. RADIATED SPURIOUS EMISSION ................................................... 16 7.1 Block Diagram Of Test Setup .......................................................... 16 7.2 Limit ................................................................................ 16 7.3 Test procedure ....................................................................... 17 7.4 Test Result .......................................................................... 18 8. BAND EDGE AND RF CONDUCTED SPURIOUS EMISSIONS ........................... 27 8.1 Block Diagram Of Test Setup .......................................................... 27 8.2 Limit ................................................................................ 27 8.3 Test procedure ....................................................................... 27 8.4 Test Result .......................................................................... 28 9. COUDUCTED PEAK OUTPUT POWER ............................................... 31 9.1 Block Diagram Of Test Setup .......................................................... 31 9.2 Limit ................................................................................ 31 9.3 Test procedure ....................................................................... 31 9.4 Test Result .......................................................................... 31 10. 20DB OCCUPIED BANDWIDTH...................................................... 33 10.1 Block Diagram Of Test Setup ......................................................... 33 10.2 Limit ............................................................................... 33 10.3 Test procedure ...................................................................... 33 10.4 Test Result ......................................................................... 33 11. CARRIER FREQUENCIES SEPARATION ............................................. 35 11.1 Block Diagram Of Test Setup ......................................................... 35 11.2 Limit ............................................................................... 35 11.3 Test procedu…

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0~2dbi product model name_antenna model name_PCB Antenna Test Equipment:XXXX 1. Electrical Characteristics No. Item Specifications 1 Working Central Frequency 2450 MHz 2 Band Width ±75 MHz ( 2375～2525MHz ) 3 Gain 4 V.S.W.R (in BW)≤2.0 5 Polarization Linear 6 Azimuth Beam width Omni-directional 7 Impedance 50  Dongguan YinJiaYouPing Electronics Co., Ltd Room 603, No.58 Huangtang Xianlin 1st Road,Hengli Town, Dongguan City, Guangdong Province,P.R.China 2.Return Loss and Smith Chat -40-35-30-25-20-15-10 -5 0 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 M1 M2 M3 M4 Return Loss Current Model: S332D Serial #: 00924093 Date: Sep/02/2009 Time: 14:16:43 Std: --- Channel: N/A Resolution: 517 FlexCAL:ON(COAX) CW: ON dB Frequency (2000.0 - 3000.0 MHz) M1: -12.90 dB @ 2397.387 MHz M2: -19.64 dB @ 2451.550 MHz M3: -15.75 dB @ 2482.658 MHz M4: -.28 dB @ 2000.100 MHz 3． ．． ．Physical Test Environment Antitsu S332D 0.2 0.4 0.6 0.8 1 1.5 2 3 4 5 10 20 50 0.2 0.4 0.6 0.8 1 1.5 2 3 4 5 10 20 50 -0.2 -0.4 -0.6 -0.8 -1 -1.5 -2 -3 -4 -5 -10 -20 -50 M1 M2 M3 M4 Smith Chart Current Model: S332D Serial #: 00924093 Date: Sep/02/2009 Time: 14:16:43 Prop.Vel:.800 Resolution: 517 FlexCAL:ON(COAX) CW ON M1: r=1.48, x=0.30 @ 2397.387 MHz M2: r=1.02, x=-0.21 @ 2451.65 MHz M3: r=0.75, x=-0.14 @ 2482.658 MHz M4: r=0.02, x=0.43 @ 2000.10 MHz 4. Shape of the antenna 5 Radiation Pattern END

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model:Cyclones V9 Plus Test Setup Photos of EUT 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