2AUIF-NV-08157Wireless Bone Conduction Headphone

(MAX SALES GROUP INC) (Apr .24, 2023) 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 (2AUIF-NV-08157) [MAX SALES GROUP INC] (“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. Sincerely, (Applicant signature) (Applicant printed name) Tarun Khiani (MAX SALES GROUP INC) (Apr.24, 2023) 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 (2AUIF-NV-08157) [MAX SALES GROUP INC] (“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) Tarun Khiani

Attestation Statements (May. 16, 2023) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID:2AUIF-NV-08157) (Max Sales Group ), the undersigned, hereby authorize (Max Sales Group) to act as our designated U.S. agent for service of process, (Max Sales Group) accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. (Max Sales Group) accepts the responsibility to act as designated U.S. agent for service of process, provides an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Information： Company name: Max Sales Group Contact Name: Tarun Khiani Address: 15240 NELSON AVENUE CITY OF INDUSTRY, Los Angeles, CA 91744, United States Telephone No: 13538214502 Email: [email protected] U.S. Agent Information: Company Name: Max Sales Group Address: 15240 NELSON AVENUE CITY OF INDUSTRY, Los Angeles, CA 91744, United States Contact Name: Tarun Khiani Telephone No: 13538214502 Email: [email protected] FRN: 0028712974 Applicant Signature: Agent Signature: Applicant printed name: Tarun Khiani Agent printed name: Tarun Khiani

Max Sales Group (2023.05.16) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Wireless Bone Conduction Headphone / NV-08157 / FCC ID: 2AUIF-NV-08157) 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: Tarun Khiani Title: Purchase Manager

Max Sales Group (2023.05.16) 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: Tarun Khiani Title: Purchase Manager

External Photos

FCC ID LABEL: Label Location: FCC ID: 2AUIF-NV-08157 Model: NV-08157

Internal Photos ANT

Shenzhen CTB Testing Co., Ltd. FCC ID:2AUIF-NV-08157 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 -0.572 0.88 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.441 -0.57 0.88 0±1 1.00 1.26 <5 0.39338 3.00 YES 2.480 -0.003 1.00 0±1 1.00 1.26 <5 0.39651 3.00 YES 2.402 0.245 1.06 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.441 0.283 1.07 0±1 1.00 1.26 <5 0.39338 3.00 YES 2.480 0.777 1.20 0±1 1.00 1.26 <5 0.39651 3.00 YES GFSK π /4DQPSK Conclusion: For the max result : 0.39651≤ FCC Limit 3.0 for 1g SAR.

7b51268c-04a86da5-9d2957e8-39fbb3bd Manufacturer: ZHUHAI JIELI TECHNOLOGY CO.,LTD 333 Kexing Road, Xiangzhou District, Zhuhai City, Guangdong Province 7b51268c-04a86da5-9d2957e8-39fbb3bd 7b51268c-04a86da5-9d2957e8-39fbb3bd

Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB230418001RF Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 53 TEST REPORT Compiled by: Reviewed by: Approved by: Chen Zheng 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 Bone Conduction Headphone FCC ID: 2AUIF-NV-08157 Trademark: N/A Model Number: NV-08157 Prepared For: Max Sales Group Address: 15240 NELSON AVENUE CITY OF INDUSTRY, Los Angeles, CA 91744, United States Manufacturer: Max Sales Group Address: 15240 NELSON AVENUE CITY OF INDUSTRY, Los Angeles, CA 91744, United States 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: Apr. 13, 2023 Sample tested Date: Apr. 13, 2023 to Apr. 18, 2023 Issue Date: Apr. 18, 2023 Report No.: CTB230418001RF Test Standards FCC Part15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB230418001RF Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 53 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 ............................................ 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 .......................... 26 8.1 Block Diagram Of Test Setup .......................................................... 26 8.2 Limit ................................................................................ 26 8.3 Test procedure ....................................................................... 26 8.4 Test Result .......................................................................... 27 9. COUDUCTED PEAK OUTPUT POWER ............................................... 32 9.1 Block Diagram Of Test Setup .......................................................... 32 9.2 Limit ................................................................................ 32 9.3 Test procedure ....................................................................... 32 9.4 Test Result .......................................................................... 33 10. 20DB OCCUPIED BANDWIDTH...................................................... 36 10.1 Block Diagram Of Test Setup ......................................................... 36 10.2 Limit ............................................................................... 36 10.3 Test procedure ...................................................................... 3 6 10.4 Test Result ......................................................................... 36 11. CARRIERFREQUENCIES SEPARATION .............................................. 39 11.1 Block Diagram Of Test Setup ......................................................... 39 11.2 Limit ............................................................................... 39 11.3 Test procedure ...................................................................... 39 11.4 Test Result ......................................................................... 39 12. HOPPING CHANNEL NUMBER ...................................................... 42 12.1 Block Diagram Of Test Setup ......................................................... 42 12.2 Limit .............................................................…

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Radiated Emission Below 1G Above 1G Conducted emissions