2A9MI-Y20HELMET WIRELESS EARPHONE

TianHeng Consulting,LLC 2.911(d)(7)USAAgentv1.2 Section2.911(d)(7)USAAgentforServiceofProcess Companyname:ShenzhenYixiTechnologyCo.,LTD Address:SecondFloor,BuildingB,AreaA,LongquanSciencePark,DalangHuaxingRoad, LonghuaDistrict,ShenzhenCity ProductName:HELMETWIRELESSEARPHONE FCCID:2A9MI-Y20 Model(s): 2.911(d)(7)USADesignatedAgentforServiceofProcess We,[ShenzhenYixiTechnologyCo.,LTD](“theapplicant”)designate[AgentlocatedintheUnitedStates] NOTE1 forthepurposeofacceptingserviceofprocessonbehalfoftheapplicant. Applicantconsent:WeAcknowledgeourconsenttoacceptserviceofprocessintheUnitedStatesfor mattersrelatedtotheapplicableequipment,andatthephysicalU.S.addressandemailaddressofthe designatedagentandacknowledgeouracceptanceofourobligationtomaintainanagentforserviceof processintheUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanently terminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S.,ortheconclusionof anyCommission-relatedadministrativeorjudicialproceedinginvolvingtheequipment,whicheverislater. Agentobligation:WeAcknowledgeourobligationtoacceptserviceofprocessintheUnitedStatesfor mattersrelatedtotheapplicableequipmentatourphysicalU.S.addressandemailaddressfornoless thanoneyearaftereitherthegranteehaspermanentlyterminatedallmarketingandimportationofthe applicableequipmentwithintheU.S.,ortheconclusionofanyCommission-relatedadministrativeor judicialproceedinginvolvingtheequipment,whicheverislater. USAAgent Companyname:TianHengConsulting,LLC Address:392AndoverStreet,Wilmington,MA 01887,UnitedStates FRN:0033401258 ContactName:HualingDong TelephoneNo:(617)997-4010 Email:[email protected] Applicant Companyname:ShenzhenYixiTechnologyCo., LTD Address:SecondFloor,BuildingB,AreaA, LongquanSciencePark,DalangHuaxingRoad, LonghuaDistrict,ShenzhenCity ContactName:Qisong.Wang TelephoneNo:13423817655 Email:[email protected] Signature:HualingDong Title:President Signature:Qisong.Wang Title: Date:2023-7-12Date:2023-7-12 NOTE1:AnapplicantlocatedintheUnitedStatesmaydesignateitselfastheagentforserviceofprocess. Reference;FederalRegisterdocument2022-28263publishedon02/06/23 Y20, H5, YP20, Y20 2x Manager

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 FCC ID: 2A9MI-Y20 Contact Name: Qisong Wang Address: Second Floor, Building B, Area A, Longquan Science Park, Dalang Huaxing Road, Longhua District, Shenzhen City 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. The applicant must sign this certification. [Shenzhen Yixi 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 . Date: 2023/07/12 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 Prod uct name: HELMET WIRELESS EARPHONE Model name: Y20, H5, YP20, Y20 2x FCC ID/ISED: 2A9MI-Y20 We (Shenzhen Yixi Tec hnology 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: 2023-07-12 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 Product Name: HELMET WIRELESS EARPHONE Model Number: Y20, H5, YP20, Y20 2x FCC Identifier: 2A9MI-Y20 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 tak e 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: 2023-07-12 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: 2023-07-12 Subject: Request for Confidentiality FCC ID: 2A9MI-Y20 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: 2023-07-12 Title: Manager Signature of applicant:

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202307371F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 4 External Photo Report No.: HTT202307371F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 4 Report No.: HTT202307371F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 4 Label&location Report No.: HTT202307371F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 4 of 4

FCC ID LABELING AND LOCATION FCC ID Label FCC ID: 2A9MI-Y20 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)

FCC ID : 2A9MI-Y20 RF EXPOSURE EVALUATION METHOD FCC ID: 2A9MI-Y20 According to KDB 447498 D01 General RF Exposure Guidance v06 SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. 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 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 is applied to determine SAR test exclusion. Maximum measured transmitter power. BT 1Mbps Test Channel Frequency (MHz) Peak Output Power (dBm) Peak Output Power (mW) CH00 2402 0.236 1.056 CH39 2441 0.380 1.091 CH78 2480 0.196 1.046 2Mbps CH00 2402 1.039 1.270 CH39 2441 1.213 1.322 CH78 2480 0.988 1.255 Remark: The best case gain of the antenna is 2.37dBi. 2.37dBi logarithmic terms convert to numeric result is nearly 1.73 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)] FCC ID : 2A9MI-Y20 BT Te s t Channel Range tune up max power (dBm) [(max. power of channel, including tune-up tolerance, mW) (min. test separation distance,mm)] [f(GHz)] Result Limit 1Mbps CH00 0~2 2 1.585 5 2.402 0.491 3 CH39 0~2 2 1.585 5 2.441 0.495 3 CH78 0~2 2 1.585 5 2.480 0.499 3 2Mbps CH00 0~2 2 1.585 5 2.402 0.491 3 CH39 0~2 2 1.585 5 2.441 0.495 3 CH78 0~2 2 1.585 5 2.480 0.499 3 The test Result is less than 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Conclusion: No SAR is 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 Y20 天线型号 测 试 魏月娥 审 核 杨权生 日 期 2023-05-31 天线测试报告 Antenna test report SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn SHENZHENFEIMINTECHNOLOGYCO.,LTD. 深圳市飞敏科技有限公司 ShenzhenFeiminTechnologyCo.,Ltd2 2 1. 项目信息 ProjectInformation 1.1.外观尺寸AppearanceandDimensions 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 测试拍照 Test photos 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 5.6NH D3天线 芯片 NC GND GND 1.8PF 天线驻波比 Antenna SWR SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn 天线回波损耗 Antenna Return loss SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. TEL:0755-23035723 Mail:[email protected] URL:www.fmant.cn 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 天线 Freq(MHz) Efficiency (％) Gain(dBi) 2400 40.15 1.73 2410 39.75 2.37 2420 42.29 2.01 2430 43.46 1.86 2440 44.73 2.29 2450 44.73 2.11 2460 43.14 2.12 2470 41.57 1.94 2480 40.46 1.6 2490 39.62 1.75 2500 37.05 1.44 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！

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202307371F01 This results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Page 1 of 44 TEST Report Applicant: Shenzhen Yixi Technology Co., LTD. Address of Applicant: Second Floor, Building B, Area A, Longquan Science Park, Dalang Huaxing Road, Longhua District, Shenzhen City Manufacturer : Shenzhen Yixi Technology Co., LTD. Address of Manufacturer : Second Floor, Building B, Area A, Longquan Science Park, Dalang Huaxing Road, Longhua District, Shenzhen City Equipment Under Test (EUT) Product Name: HELMET WIRELESS EARPHONE Model No.: Y20 Series model: H5, YP20, Y20 2x Trade Mark: N/A FCC ID: 2A9MI-Y20 Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of sample receipt: Jun. 29, 2023 Date of Test: Jun. 29, 2023- Jul. 10, 2023 Date of report issued: Jul. 10, 2023 Test Result : PASS * * In the configuration tested, the EUT complied with the standards specified above. Report No.: HTT202307371F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 2 of 44 1. Version Version No. Date Description 00 Jul. 10, 2023 Original Tested/ Prepared By Date: Jul. 10, 2023 Project Engineer Check By: Date: Jul. 10, 2023 Reviewer Approved By : Date: Jul. 10, 2023 Authorized Signature Report No.: HTT202307371F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 3 of 44 2. Contents Page 1. VERSION .................................................................................................................................................. 2 2. CONTENTS .............................................................................................................................................. 3 3. TEST SUMMARY ..................................................................................................................................... 4 4. GENERAL INFORMATION ...................................................................................................................... 5 4.1. GENERAL DESCRIPTION OF EUT ......................................................................................................... 5 4.2. TEST MODE ........................................................................................................................................ 7 4.3. DESCRIPTION OF SUPPORT UNITS ....................................................................................................... 7 4.4. DEVIATION FROM STANDARDS ............................................................................................................. 7 4.5. ABNORMALITIES FROM STANDARD CONDITIONS .................................................................................... 7 4.6. TEST FACILITY .................................................................................................................................... 7 4.7. TEST LOCATION .................................................................................................................................. 7 4.8. ADDITIONAL INSTRUCTIONS ................................................................................................................. 7 5. TEST INSTRUMENTS LIST ..................................................................................................................... 8 6. TEST RESULTS AND MEASUREMENT DATA ...................................................................................... 9 6.1. CONDUCTED EMISSIONS ..................................................................................................................... 9 6.2. CONDUCTED PEAK OUTPUT POWER .................................................................................................. 12 6.3. 20DB EMISSION BANDWIDTH ............................................................................................................. 15 6.4. FREQUENCIES SEPARATION .............................................................................................................. 18 6.5. HOPPING CHANNEL NUMBER ............................................................................................................. 21 6.6. DWELL TIME ..................................................................................................................................... 24 6.7. BAND EDGE ...................................................................................................................................... 28 6.7.1. Conducted Emission Method ..................................................................................................... 28 6.7.2. Radiated Emission Method ........................................................................................................ 31 6.8. SPURIOUS EMISSION ......................................................................................................................... 33 6.8.1. Conducted Emission Method ..................................................................................................... 33 6.8.2. Radiated Emission Method ........................................................................................................ 36 6.9. ANTENNA REQUIREMENT ................................................................................................................... 44 7. TEST SETUP PHOTO ......................................................................................................................…

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Shenzhen HTT Technology Co., Ltd. Report No.: HTT202307371F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 2 Test Setup Photo Radiated Emission Report No.: HTT202307371F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 2 Conducted Emission ------End------