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1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: TRANS-PAC CHINA LLC FRN: 0033472614 Contact Name: Lisa Lee Address: 3715 S 182nd Street, C120 Seatac, WA 98188-9993 US Telephone No: +1（818）818-0538 Email: [email protected] Applicant: Company name: YI ZHAO (SHENZHEN) CO., LIMITED Product Description: OpenRock S Grantee code: 2A25A FCC ID: 2A25A-T2 Contact Name: Jenny Qiu Address: 6th Floor, T3 Creative Building, Creative Expo City, No.5010 Baoan Avenue, Hangcheng Street, Baoan Shenzhen, China Telephone No: 0755-29082307 Email: [email protected] [YI ZHAO (SHENZHEN) CO., LIMITED] certifies that, as of the date of this filing of the application with the TCB, [TRANS-PAC CHINA LLC] is our designated US agent for service of process for the above referenced FCC ID. [YI ZHAO (SHENZHEN) CO., LIMITED] 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 equipment. [TRANS- PAC CHINA LLC] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 07.14.2023 Applicant’s Name: Jenny Qiu US Agent’s Name: Lisa Lee Title: Purchasing Manager Title: Manager Signature Signature

C5266091_X24_Ed.2 1/1 “Attestation Statements” TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: YI ZHAO (SHENZHEN) CO., LIMITED Grantee code: 2A25A FCC ID: 2A25A-T2 Contact Name: Jenny Qiu Address: 6th Floor, T3 Creative Building, Creative Expo City, No.5010 Baoan Avenue, Hangcheng Street, Baoan Shenzhen, China Telephone No: 0755-29082307 Fax No: 0755-29082307 Email: [email protected] i. [YI ZHAO (SHENZHEN) CO., LIMITED] (“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. The applicant must sign this certification. ii. [ YI ZHAO (SHENZHEN) CO., LIMITED] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. YI ZHAO (SHENZHEN) CO., LIMITED 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. Date: 07.14.2023 Applicant’s Name: Jenny Qiu Title: Purchasing Manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: YI ZHAO (SHENZHEN) CO., LIMITED. Address: 6th Floor, T3 Creative Building, Creative Expo City, No.5010 Baoan Avenue, Hangcheng Street, Baoan Shenzhen, China Product Name: OpenRock S Model Number: OpenRock S FCC Identifier: 2A25A-T2 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Jenny Qiu Date: 7/14/2023 Title: Purchasing Manager Signature of applicant:

C5266091_X10_Ed.1 1/1 YI ZHAO (SHENZHEN) CO., LIMITED. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 7/14/2023 Subject: Request for Confidentiality FCC ID: 2A25A-T2 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality 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 Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No 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. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Jenny Qiu Date: 7/14/2023 Title: Purchasing Manager

Page 1 of 4 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Appendix - EUT Photos Model: OpenRock S Page 2 of 4 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Page 3 of 4 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Page 4 of 4 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] ----End of Report----

YI ZHAO (SHENZHEN) CO., LIMITED version02 7/14/2023 Dear Sirs: We hereby declare that because the earphone size is too small, the FCC ID number is printed on the User Manual, hereby declare. FCC ID: 2A25A-T2 Sincerely, Signature: Name: Jenny Qiu Title: Purchasing Manager Company: YI ZHAO (SHENZHEN) CO., LIMITED

Page 1 of 3 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Appendix - EUT Photos Model: OpenRock S ANT Page 2 of 3 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Page 3 of 3 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] ----End of Report----

Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] RF EXPOSURE Test Report Report No.: MTi230504004-07E2 Date of issue: 2023-06-14 Applicant: YI ZHAO (SHENZHEN) CO., LIMITED Product: OpenRock S Model(s): OpenRock S FCC ID: 2A25A-T2 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 6- Report No.: MTi230504004-07E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Instructions 1. The report shall not be partially reproduced without the written consent of the laboratory; 2. The test results of this report are only responsible for the samples submitted; 3. This report is invalid without the seal and signature of the laboratory; 4. This report is invalid if transferred, altered or tampered with in any form without authorization; 5. Any objection to this report shall be submitted to the laboratory within 15 days from the date of receipt of the report. - Page 3 of 6- Report No.: MTi230504004-07E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Applicant: YI ZHAO (SHENZHEN) CO., LIMITED Address: 6th Floor, T3 Creative Building, Creative Expo City, No.5010 Baoan Avenue, Hangcheng Street, Baoan Shenzhen, China Manufacturer: YI ZHAO (SHENZHEN) CO., LIMITED Address: 6th Floor, T3 Creative Building, Creative Expo City, No.5010 Baoan Avenue, Hangcheng Street, Baoan Shenzhen, China Factory: YI ZHAO (SHENZHEN) CO., LIMITED Address: 6th Floor, T3 Creative Building, Creative Expo City, No.5010 Baoan Avenue, Hangcheng Street, Baoan Shenzhen, China Product description Product name: OpenRock S Trademark: OpenRock S Model name: OpenRock S Serial Model: N/A Standards: N/A Test method: KDB 447498 D01 v06 Date of Test Date of test: 2023-06-09 ~ 2023-06-14 Test result: Pass Test Engineer : (Letter Lan) Reviewed By: : (Leon Chen) Approved By: : (Tom Xue) - Page 4 of 6- Report No.: MTi230504004-07E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Table of Contents 1. STANDALONE SAR TEST EXCLUSION CONSIDERATIONS ............................................................................................ 5 2. SAR TEST EXCLUCSION THRESHOLDS ........................................................................................................................ 6 - Page 5 of 6- Report No.: MTi230504004-07E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] 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(s), listed below, is (are) 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. The minimum test separation distance defined in 4.1 f) 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. To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified, typically in the SAR measurement or SAR analysis report, by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting are required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for 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. a) 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  The values 3.0 and 7.5 are referred to as numeric thresholds in step b) 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 4.1 f) is applied to determine SAR test exclusion. b) 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 (also illustrated in Appendix B): 1) {[Power allowed at numeric threshold for 50 mm in step a)] + [(test se…

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ATN antenna Shenzhen ATN commucation co.,Ltd Customer： lemai Project name T2- BES2600 date 2023.5.16 band 2.4G-2.48GHz Report version V2 Antenna type FPC，monopole Antenna test report ATN antenna Test system ATN antenna Antenna size ATN antenna 1.Match circuit 2.Passive test data 3.OTA data 4.Distance test Catalog ATN antenna Element Value E1(0201) 2.2pF(GRM0335C1H2R2BA01D) E2(0201) 0Ω E3(0201) NC 1.match circuit Antenna RF Module E1 E3 E2 ATN antenna 2.Passive data 2.1 S11 Parameter L R ATN antenna 2.2 Gain & Efficiency ATN antenna 2.1.3 Radiation pattern ATN antenna band channel TRP(dBm) TIS（dBm） Bluetooth BR(L) Free space 0 8.9 -89.9 39 9.5 -89.9 78 9.3 -89.1 3.OTA data band channel TRP(dBm) TIS（dBm） Bluetooth BR(R) Free space 0 8.4 -90.0 39 9.7 -91.5 78 10.8 -91.7 ATN antenna band channel TRP(dBm) TIS（dBm） Bluetooth BR(L) Head phontom 0 2.5 -82.9 39 2.9 -83.1 78 3.1 -82.7 3.OTA data band channel TRP(dBm) TIS（dBm） Bluetooth BR(R) Head phontom 0 2.2 -84.0 39 3.7 -85.0 78 4.9 -84.7 ATN antenna Mobile phone SAMSUNG s8 Distance (360°) 15 4.Distance test

Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Test Report Report No.: MTi230504004-07E1 Date of issue: 2023-06-14 Applicant: YI ZHAO (SHENZHEN) CO., LIMITED Product: OpenRock S Model(s): OpenRock S FCC ID: 2A25A-T2 Shenzhen Microtest Co., Ltd. http://www.mtitest.com Page 2 of 70 Report No.: MTi230504004-07E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86‐755)88850135 Fax: (86‐755) 88850136 Web: www.mtitest.com E‐mail: [email protected] Instructions 1. This test report shall not be partially reproduced without the written consent of the laboratory. 2. The test results in this test report are only responsible for the samples submitted 3. This test report is invalid without the seal and signature of the laboratory. 4. This test report is invalid if transferred, altered, or tampered with in any form without authorization. 5. Any objection to this test report shall be submitted to the laboratory within 15 days from the date of receipt of the report. Page 3 of 70 Report No.: MTi230504004-07E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86‐755)88850135 Fax: (86‐755) 88850136 Web: www.mtitest.com E‐mail: [email protected] Table of contents 1 General Description .......................................................................................................................... 5 1.1 Description of the EUT ....................................................................................................................................... 5 1.2 Description of test modes ................................................................................................................................... 5 1.3 Test conditions .................................................................................................................................................... 7 1.4 Description of support units ................................................................................................................................ 7 2 Measurement uncertainty ................................................................................................................. 8 3 Summary of Test Result .................................................................................................................... 9 4 Test Laboratory................................................................................................................................ 10 5 Equipment List ................................................................................................................................ 11 6 Test Result ....................................................................................................................................... 12 6.1 Antenna requirement ........................................................................................................................................ 12 6.2 AC power line conducted emissions ................................................................................................................. 13 6.3 Radiated spurious emission ............................................................................................................................. 14 6.4 20dB emission bandwidth ................................................................................................................................ 28 6.5 Maximum conducted output power .................................................................................................................. 29 6.6 Carrier frequency separation ............................................................................................................................ 30 6.7 Time of occupancy ............................................................................................................................................ 31 6.8 Number of hopping channels ........................................................................................................................... 32 6.9 Band edge (Conducted) ................................................................................................................................... 33 6.10 Conducted spurious emissions ...................................................................................................................... 34 Appendix A: 20dB Emission Bandwidth .............................................................................................. 35 Appendix B: Maximum conducted output power ................................................................................ 39 Appendix C: Carrier frequency separation .......................................................................................... 43 Appendix D: Time of occupancy ........................................................................................................... 45 Appendix E: Number of hopping channels .......................................................................................... 52 Appendix F: Band edge measurements ............................................................................................... 54 Appendix G: Conducted Spurious Emission ....................................................................................... 59 Photographs of the Test Setup .............................................................................................................. 69 Photographs of the EUT ........................................................................................................................ 70 Page 4 of 70 Report No.: MTi230504004-07E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fu…

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Page 1 of 1 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Appendix - Test Setup Photos Model: OpenRock S Radiated emissions –Below 1 GHz Radiated emissions –Above 1 GHz ----End of Report----