2A9MI-Q08HELMET WIRELESS EARPHONE

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: TianHeng Consulting,LLC FRN: 0033401258 Contact Name: Hualing Dong Address: Address:392 Andover Street, Wilmington, MA 01887, United States Telephone No: (617)997- 4010 Email: [email protected] Applicant: Company name: Shenzhen Yixi Technology Co., LTD. Product Description: HELMET WIRELESS EARPHONE Grantee code: 2A9MI FCC ID: 2A9MI-Q08 FRN： 0033155482 Contact Name: Qisong Wang Address: Second Floor, Building B, Area A, Longquan Science Park, Dalang Huaxing Road, Longhua District, Shenzhen City, China Telephone No: 86-13423817655 Email: [email protected] [Shenzhen Yixi Technology Co., LTD.] certifies that, as of the date of this filing of the application with the TCB, [TianHeng Consulting,LLC] is our designated US agent for service of process for the above referenced FCC ID. [Shenzhen Yixi Technology Co., LTD.] 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. [TianHeng Consulting,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 Applicantis 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: 2013/09/25 Applicant’s Name: Qisong Wang US Agent’s Name: Hualing Dong Title: Manager Title: President 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: Shenzhen Yixi Technology Co., LTD. Grantee code: 2A9MI FRN: 0033155482 FCC ID: 2A9MI-Q08 Contact Name: Qisong Wang Address: Second Floor, Building B, Area A, Longquan Science Park, Dalang Huaxing Road, Longhua District, Shenzhen City, China Telephone No: 86-13423817655 Fax No: / Email: [email protected] i. [Shenzhen Yixi 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. The applicant must sign this certification. ii. [Shenzhen Yixi Technology Co., LTD.]] (“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. Theapplicantmustsignthiscertification. [Shenzhen Yixi Technology Co., LTD.] (“the applicant”) certifies that, as of the date of the filing of theapplication, the applicant [is not] identified on the Covered List as an entity producing “covered”equipment . Date: 2023/09/25 Applicant’s Name: Shenzhen Yixi Technology Co., LTD. Title: 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

Shenzhen Yixi Technology Co., LTD. Product Similarity Declaration Product name: HELMET WIRELESS EARPHONE Model name: Q08, A17S FCC ID/ISED: 2A9MI-Q08 We (Shenzhen Yixi Technology Co., LTD.) hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), the only difference is the model name and color. Signature: Name: Qisong Wang Date: 2023-09-25 Title: Manager Signature of applicant:

C5266091_X8_Ed.1 1/1 Letter of Authorization Shenzhen Yixi Technology Co., LTD. Company: Shenzhen Yixi Technology Co., LTD. Address: Second Floor, Building B, Area A, Longquan Science Park, Dalang Huaxing Road, Longhua District, Shenzhen City, China Product Name: HELMET WIRELESS EARPHONE Model Number: Q08, A17S FCC Identifier: 2A9MI-Q08 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: Qisong Wang Date: 2023-09-25 Title: Manager Signature of applicant:

C5266091_X10_Ed.2 1/1 Shenzhen Yixi Technology Co., LTD. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2023-09-25 Subject: Request for Confidentiality FCC ID: 2A9MI-Q08 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 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 NOTE 1: Long‐Term Confidentiality may be permitted under special conditions (See II. LONG‐TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short‐Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. 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. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ______ days from the date of the Grant of Equipment Authorization and prior to marketing. 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. C5266091_X10_Ed.2 1/1 Sincerely, Name: Qisong Wang Date: 2023-09-25 Title: Manager Signature of applicant:

APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Photo 1 Photo 2 Photo 3 Photo 4 Label&location Photo 5

FCC ID LABELING AND LOCATION FCC ID Label FCC ID: 2A9MI-Q08 FCC ID Label Location The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 antenna Photo 9

RF Exposure evaluation FCC ID: 2A9MI-Q08 According to 447498 D01 General RF Exposure Guidance v06 The 1-g 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 eirp = pt x gt = (EXd) 2 /30 where: pt = transmitter output power in watts, gt = numeric gain of the transmitting antenna (unitless), E = electric field strength in V/m, --- 10 ((dBuV/m)/20) /10 6 d = measurement distance in meters (m)---3m So pt = (EXd) 2 /30 x gt BT Field strength = 97.20dBuV/m @3m Ant gain =2.04dBi ;so Ant numeric gain= 1.60 So pt={ [10 (97.20 /20) /10 6 x3] 2 /30x1.60 }x1000 mW =2.518mW So (2.518/mW/5mm)x √2.480GHz = 0.793<3 Then SAR evaluation is not required

专业天线服务商 深圳市飞敏科技有限公司 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 项目型号 Q08 天线型号 测 试 许高富 审 核 夏兴喜 日 期 2023-8-19 天线测试报告 Antenna test report SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd2 2 1. 项目信息 Project Information 1.1.外观尺寸Appearance and Dimensions SymbolDimension (mm) L（长度） 3.4± 0.20 W（宽度） 1.7± 0.20 T（厚度） 1.2± 0.20 S（电极宽度） 0.4± 0.20 测试设备和测试环境 Test equipment and test environment SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn 测试设备 Test equipment 无源指标 增益 效率 3D方向图 有源指标 TRP总辐射功率 TIS总接收灵敏度 探头微波暗室 频率：0.4GHz至6GHz 主要测试指标 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn 测试设备 Test equipment Agilent E5071C矢量网络分析仪 频率：300 kHz至8.5GHz R&S CMW500 宽带无线通信测试仪 GSM/3G/4G WIFI/ Bluetooth NB-IoT SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn 天线匹配 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn 2.7nN D3 1.2P NC 芯片 天线驻波比 Antenna SWR SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn 天线回波损耗 Antenna Return loss 天线增益与效率 Antenna gain and efficiency SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn Frequency (MHz) Gain (dBi) Efficiency (%) 2400 MHz 1.73 44.07 2410 MHz 1.42 46.87 2420 MHz 1.62 45.74 2430 MHz 1.60 43.41 2440 MHz 1.83 47.21 2450 MHz 2.04 46.87 2460 MHz 1.67 48.91 2470 MHz 1.51 45.95 2480 MHz 1.54 44.81 2490 MHz 1.39 46.34 2500 MHz 1.31 45.99 插入图片1 插入图片2 插入图片3 插入图片4 天线辐射方向图 Antenna Radiation Pattern SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn 深圳市宝安区西乡固戍恒南一路C栋303 TEL:(86)755-23035723. FAX:0755-23036702 E-mail:[email protected] ADD: 303，building C,GUSHU Hengnan Road,Xixiang,Baoan district Shenzhen Thanks for your support！ 感谢您的支持！

Report No.: TW2309004E Applicant: Shenzhen Yixi Technology Co., LTD Product: HELMET WIRELESS EARPHONE Model No.: Q08, A17S Trademark: N/A Test Standards: FCC Part 15.249 Test result: It is herewith confirmed and found to comply with the requirements set up by ANSI C63.10 & FCC Part 15 Subpart C, Paragraph 15.249 regulations for the evaluation of electromagnetic compatibility Approved By Terry Tang Manager Dated: September 08, 2023 Results appearing herein relate only to the sample tested The technical reports is issued errors and omissions exempt and is subject to withdrawal at SHENZHEN TIMEWAY TESTING LABORATORIES Zone C, 1st Floor, Block B, Jun Xiang Da Building, Zhongshan Park Road West, Tong Le Village, Nanshan District, Shenzhen, China Tel (755) 83448688, Fax (755) 83442996, E-Mail:[email protected] Report No.: TW2309004E Page 2 of 46 Date: 2023-09-08 The report refers only to the sample tested and does not apply to the bulk. This report is issued in confidence to the client and it will be strictly treated as such by the SHENZHEN TIMEWAY TESTING LABORATORIES. It may not be reproduced rather in its entirety or in part and it may not be used for adverting. The client to whom the report is issued may, however, show or send it . or a certified copy there of prepared by the SHENZHEN TIMEWAY TESTING LABORATORIES. to his customer. Supplier or others persons directly concerned. SHENZHEN TIMEWAY TESTING LABORATORIES. will not, without the consent of the client enter into any discussion of correspondence with any third party concerning the contents of the report. In the event of the improper use of the report. The SHENZHEN TIMEWAY TESTING LABORATORIES. reserves the rights to withdraw it and to adopt any other remedies which may be appropriate. Special Statement： The testing quality ability of our laboratory meet with "Quality Law of People's Republic of China" Clause 19. The testing quality system of our laboratory meet with ISO/IEC-17025 requirements, which is approved by CNAS. This approval result is accepted by MRA of APLAC. Our test facility is recognized, certified, or accredited by the following organizations: CNAS-LAB Code: L2292 The EMC Laboratory has been assessed and in compliance with CNAS-CL01 accreditation criteria for testing Laboratories (identical to ISO/IEC 17025:2017 General Requirements) for the Competence of testing Laboratories. FCC-Registration No.: 744189 The EMC Laboratory has been registered and fully described in a report filed with the (FCC) Federal Communications commission. The acceptance letter from the FCC is maintained in our files. Registration No.: 744189. Industry Canada (IC) —Registration No.:5205A The EMC Laboratory has been registered by Certification and Engineering Bureau of Industry Canada for radio equipment testing with Registration No.: 5205A. A2LA (Certification Number:5013.01) The EMC Laboratory has been accredited by the American Association for Laboratory Accreditation (A2LA). Certification Number:5013.01 Report No.: TW2309004E Page 3 of 46 Date: 2023-09-08 The report refers only to the sample tested and does not apply to the bulk. This report is issued in confidence to the client and it will be strictly treated as such by the SHENZHEN TIMEWAY TESTING LABORATORIES. It may not be reproduced rather in its entirety or in part and it may not be used for adverting. The client to whom the report is issued may, however, show or send it . or a certified copy there of prepared by the SHENZHEN TIMEWAY TESTING LABORATORIES. to his customer. Supplier or others persons directly concerned. SHENZHEN TIMEWAY TESTING LABORATORIES. will not, without the consent of the client enter into any discussion of correspondence with any third party concerning the contents of the report. In the event of the improper use of the report. The SHENZHEN TIMEWAY TESTING LABORATORIES. reserves the rights to withdraw it and to adopt any other remedies which may be appropriate. Test Report Conclusion Content 1.0 General Details................................................................................................ 4 1.1 Test Lab Details................................................................................................ 4 1.2 Applicant Details.............................................................................................. 4 1.3 Description of EUT .......................................................................................... 4 1.4 Submitted Sample............................................................................................. 4 1.5 Test Duration................................................................................................... 5 1.6 Test Uncertainty................................................................................................ 5 1.7 Test By......................................................................................................... 5 2.0 List of Measurement Equipment......................................................................... 6 3.0 Technical Details............................................................................................. 7 3.1 Summary of Test Results.................................................................................... 7 3.2 Test Standards................................................................................................. 7 4.0 EUT Modification........................................................................................... 7 5.0 Power Line Conducted Emission Test.................................................................. 8 5.1 Schematics of the Test....................................................................................... 8 5.2 Test Method and Test Procedure............................................................................ 8 5.3 Configuration of the EUT.................................................................................... 8 5.4 EUT Operating Condition.................…

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Test setup photo Radiated Emission Test Setup Radiated Emission Test Setup Conducted Emission Test Setup