2AOHU-K2PRORiding helmet headset

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Shenzhen HTT Technology Co., Ltd. Report No.: HTT202602355 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 Product Name: Riding helmet headset Model No.: K2 Pro EUT Constructional Details External Photo Report No.: HTT202602355 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.: HTT202602355 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 Report No.: HTT202602355 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 ------End------

Label and Location Size: L: 1.0cm*W: 0.2cm Label and Location FCC ID : 2AOHU-K2PRO

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202602355 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 3 Product Name: Riding helmet headset Model No.: K2 Pro EUT Constructional Details Internal Photo Report No.: HTT202602355 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 3 BT/BLE ANT Report No.: HTT202602355 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 3 ------End------ 2.4G ANT

Shenzhen HTT Technology Co., Ltd. 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 1 of 10 RF Exposure evaluation Report Reference No. ..................... : FCC ID............................................. : HTT202602355F04 2AOHU-K2PRO Compiled by ( position+printed name+signature) . : File administrators Supervised by ( position+printed name+signature) . : Project Engineer Approved by ( position+printed name+signature) . : RF Manager Date of issue .................................... : Mar. 03, 2026 Testing Laboratory Name .............. : Shenzhen HTT Technology Co.,Ltd. Address ............................................ : 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao’an District, Shenzhen, Guangdong, China Applicant’s name ............................ : Shenzhen Weile Electronics Co., Ltd. Address ............................................ : Room 602,Building 2,Zhuguang Innovative Technology Park,Taoyuan Street,Nanshan District,Shenzhen City, China Standard ........................................... : 47CFR §1.1310 47CFR §2.1093 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen HTT Technology Co.,Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HTT Technology Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HTT Technology Co.,Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Riding helmet headset Manufacturer .................................... : Shenzhen Weile Electronics Co., Ltd. Trade Mark ........................................ N/A Model/Type reference ...................... : K2 Pro Rating ............................................... : DC 3.7V From Battery and DC 5V From External Circuit Result ............................................... : PASS Report No.: HTT202602355F04 Page 2 of 10 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 10 T E S T R E P O R T Equipment under Test : Riding helmet headset Model /Type : K2 Pro Listed Models : K2, K2 Pro Max Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number is different for these model. Applicant : Shenzhen Weile Electronics Co., Ltd. Address : Room 602,Building 2,Zhuguang Innovative Technology Park,Taoyuan Street,Nanshan District,Shenzhen City, China Manufacturer : Shenzhen Weile Electronics Co., Ltd. Address : Room 602,Building 2,Zhuguang Innovative Technology Park,Taoyuan Street,Nanshan District,Shenzhen City, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: HTT202602355F04 Page 3 of 10 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 10 Contents 1 T E S T S T A N D A R D S ................................................... 4 2 S U M M A R Y .............................................................. 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Special Accessories 5 2.4 Modifications 6 3 T E S T E N V I R O N M E N T 7 3.1 Address of the test laboratory 7 3.2 Test Facility 7 3.3 Statement of the measurement uncertainty 7 4 T E S T L I M I T 8 4.1 Requirement 8 4.2 Conducted Power Results 9 4.3 Manufacturing tolerance 9 4.4 Evaluation Result 10 4.5 Simultaneous Transmission for SAR Exclusion 10 5 C O N C L U S I O N 10 Report No.: HTT202602355F04 Page 4 of 10 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 4 of 10 1 T E S T S T A N D A R D S The tests were performed according to following standards: ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz. FCC KDB 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Device, RF Exposure, Equipment Authorization Procedures. FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits. FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices Report No.: HTT202602355F04 Page 5 of 10 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 5 of 10 2 S U M M A R Y 2.1 General Remarks Date of receipt of test sample : Feb. 24, 2026 Testing commenced on : Feb. 24, 2026 Testing concluded on : Mar. 03, 2026 2.2 Product Description Product description: Riding helmet headset Model/Type reference: K2 Pro Power supply: DC 3.7V From Battery and DC 5V From External Circuit Adapter Information (Auxiliary test provided by the lab): Testing sample ID： HTT202602355-1# (Engineer sample) HTT202602355-2# (Normal sample) Hardware version: / Software version: / Bluetooth : Supported Type: Bluetooth BR/EDR Modulation: GFSK, π/4DQPSK Operation frequency: 2402MHz~2480MHz Channel number: 79 Channel separation: 1MHz Antenna type: Chip Antenna Antenna gain: 3.54 d…

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SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 1 深圳市飞敏科技有限公司 ShenZhen FeiMin Technology CO.,LTD. 产品规格书 Product specification 客户 CUSTOMER: 众兴电子实业有限公司 产品名称 PRODUCTS: 341712—D3贴片天线 客户料号 PART NO: 1016-000027 产品型号 Spec.: FM-S2279-D3-BT 日期 Data: 2022.10.14 备注：承认盖章后请回复一份承认书（或复印件）给我司，其余由贵公司存档 REMARK:Please send us one(or copy)of this approval with stamp after accepting,other copies filed by the customer. 地址：深圳市宝安区西乡街道固戍社区恒南一路C栋厂房303室 ADD:Room 303,Building C,Hengnan one Road,Gushu community,Xixiang Street,Bao’an District,Shenzhen City 电话Tel: 0755-23035723 传真Fax: 0755-23036702 邮箱E-mail: [email protected] 网址HTTP:www.fmant.cn 客户 CUSTOMER 承认 ACCEPTED BY 审核 CHECKED BY 批准 APPROVED BY 供应商 SUPPLIER 拟制 PREPARED BY 审核 CHECKED BY 批准 APPROVED BY 杨轩 夏兴喜 马冬冬 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 2 2 1. 项目信息Project Information 1.1. 外观尺寸Appearance and Dimensions Symbol Dimension (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 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 3 3 1.2. 天线净空区面积antenna Clearance area 在设计天线时，应远离金属部件和不相关的部件，如电池、振荡器、防护罩、摄像头等，为天线留出 干净的空间。这个间隔简称为净空区。以下是我们建议预留的净空区面积大小。 When designing the antenna, it should be far away from metal components and irrelevant components such as batteries, oscillators, shields, cameras, etc. to leave a clean space for the antenna. This interval is called clearance area. The following is the size of clearance area we recommend to reserve. 天线型号（Model） 天线尺寸 （size） 净空区面积 Clearance area L*W(mm) A1（2.4G单极） 5.5*1.2*1.2 9.1*5.6 X5（2.4G单极） 5.2*2.2*1.0 8.7*6.5 X6（2.4G pifa） 3.2*1.6*1.0 7.0*6.0 D1（2.4G单极） 5.2*2.2*1.0 8.7*6.5 D2（2.4G单极） 5.2*2.2*1.0 8.7*6.5 D3（2.4G单极） 3.4*1.7*1.2 7.2*6.0 F01（2.4G pifa） 3.2*1.6*0.4 7.0*6.0 S2（2.4/5.8G双频） 7.0*3.0*2.0 9.0*7.0 U1 (UHF单极） 15.0*3.0*1.0 19.0*8.0 G2（GPS单极） 9.5*3.0*1.0 13.5*7.5 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 4 4 1.3. 天线Demo测试板 Demo Test Board with Antenna(Unit:mm) 1.4. 匹配电路Matching Circuit 使用以下推荐的匹配和调谐元件值，在我们的标准30*40 mm评估板上，中心频率约为2440mhz。然 而，这些是典型的参考值，当电路板或零件供应商不同时，可能需要更改。 With the following recommended values of matching and tuning components,the center frequencies will be about 2440 MHz at our standard 30*40 mm evaluation board.However,these are typical reference values which may need to be changed when circuit boards or part vendors are diffierent. 2 3 1 系统匹配电路元件(村田) System Matching Circuit Component（Murata） Location Desciption Tolerance 1 NC / 2 4.7nH(0402) ±0.2nH 3 1.0pF (0402) ±0.1pF SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 5 5 2. 电特性Electrical Characteristics(30*40mm ground plane) 2.1.电子表格Electrical Table 特征Characteristics 规范Specifications 单位Unit 轮廓尺寸Outline Dimensions 3.4*1.7*1.2 mm 工作频率Working Frequency 2400-2500 MHz 电压驻波比VSWR <2 / 阻抗Impedance 50 Ω 极化Polarization 线极化 / 增益Gain 峰值Peak 3 dBi 效率Efficiency 50 % 2.2.电压驻波比与回波损耗 VSWR & return loss VSWR return loss SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 6 6 2.3.天线增益与效率 Gain and Efficiency 测试系统Test system Frequency (MHz) Gain (dBi) Efficiency (%) 2400 MHz 2.53 48.07 2410 MHz 2.42 46.87 2420 MHz 2.62 45.74 2430 MHz 2.60 47.41 2440 MHz 2.83 49.21 2450 MHz 3.04 49.87 2460 MHz 3.37 50.91 2470 MHz 3.51 51.95 2480 MHz 3.54 52.81 2490 MHz 3.39 51.34 2500 MHz 3.31 49.99 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 7 7 2.4.天线辐射方向图Antenna radiation pattern [email protected] 2D-plane XOY @2.44GHz 2D-plane [email protected] 2D-plane YOZ @2.44GHz SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 8 8 3.包装信息Packaging Information 3.1. 胶带规范Tape specification Index A0 B0 K0 P0 P P2 φD0 W E F T Dimension(mm) 2.0± 0.1 3.7± 0.1 1.5± 0.1 4.0± 0.1 4.0± 0. 1 2.0± 0.1 1.5 +0.1 12.0 ±0.3 1.75 ±0.1 3.7± 0.1 0.3± 0.05 1. 10链轮孔距累积公差±0.20。10 sprocket hole pitch cumulative tolerance ±0.20. 2. 在250毫米中，载体的拱度在1毫米以内。Carrier camber is within 1 mm in 250 mm. 3. 所有尺寸符合EIA-481-C要求。All dimensions meet EIA-481-C requirements. 4. 材料:透明PS。Material :Transparent PS. 5. 包装长度每7“卷:12.5米。Packing length per 7" reel :12.5Meters. 6. 组件加载/ 7”卷:3000个。Component load per 7" reel : 3000 pcs.(前后共预留120pcs) 3.2.卷规范Reel specification Index A B C D Dimension(mm) 13.3±0.3 100±0.3 330±0.3 24.5±0.3 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 9 9 4.注意事项Notes 1) 产品应小心处理，以避免汗水和皮肤油脂损坏或污染。 Products should be handled with care to avoid damage or contamination from perspiration and skin oils. 2) 对于单个部件，强烈建议使用镊子或真空拾取。 The use of tweezers or vacuum pick up is strongly recommended for individual components. 5.储存条件Storage Conditions 1) 推荐产品从交货之日起6个月内使用。 Recommended products should be used within 6 months form the time of delivery. 2) 存储环境条件 Storage environment condition  温湿度条件:-10~40°C，30~70%RH。 Temperature and humidity conditions:-10~40°C and 30~70%RH.  包装材料应保存在空气中不含氯或硫的地方。 The packaging material should be kept where no chlorine or sulfur exists in the air.  产品应储存在仓库内，无热震、振动、阳光直射等。 Products should be storage in thewarehouse without heat shock,vibration,direct sunlight and so on.

1 Appendix RF Test Data for BT Company: : Shenzhen Weile Electronics Co., Ltd. EUT : Riding helmet headset FCC ID: : 2AOHU-K2PRO Model Number : K2 Pro Report No. : HTT202602355F01 Reviewed By : Heber He 2 1. Duty Cycle 1.1 Test Result 1.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) Packet Type T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) GFSK SISO 2402 DH5 2.880 3.751 76.78 1.15 0.03 2441 DH5 2.881 3.751 76.81 1.15 0.03 2480 DH5 2.880 3.749 76.82 1.15 0.01 Pi/4DQPSK SISO 2402 2DH5 2.887 3.751 76.97 1.14 0.03 2441 2DH5 2.887 3.751 76.97 1.14 0.03 2480 2DH5 2.887 3.749 77.01 1.13 0.01 3 1.2 Test Graph 1.2.1 Ant1 GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV 4 GFSK_DH5_HCH_2480MHz_Ant1_NTNV Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV 5 Pi/4DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV 6 2. Bandwidth 2.1 Test Result 2.1.1 OBW Mode TX Type Frequency (MHz) Packet Type ANT 99% Occupied Bandwidth (MHz) Verdict Result Limit GFSK SISO 2402 DH5 1 0.965 / Pass 2441 DH5 1 0.983 / Pass 2480 DH5 1 0.989 / Pass Pi/4DQPSK SISO 2402 2DH5 1 1.243 / Pass 2441 2DH5 1 1.255 / Pass 2480 2DH5 1 1.256 / Pass 2.1.2 20dB BW Mode TX Type Frequency (MHz) Packet Type ANT 20dB Bandwidth (MHz) Verdict Result Limit GFSK SISO 2402 DH5 1 1.027 / Pass 2441 DH5 1 1.031 / Pass 2480 DH5 1 1.063 / Pass Pi/4DQPSK SISO 2402 2DH5 1 1.335 / Pass 2441 2DH5 1 1.341 / Pass 2480 2DH5 1 1.351 / Pass 7 2.2 Test Graph 2.2.1 OBW GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV 8 GFSK_DH5_HCH_2480MHz_Ant1_NTNV Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV 9 Pi/4DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV 10 2.2.2 20dB BW GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV 11 GFSK_DH5_HCH_2480MHz_Ant1_NTNV Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV 12 Pi/4DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV 13 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Mode TX Type Frequency (MHz) Packet Type Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit GFSK SISO 2402 DH5 -0.76 <=20.97 Pass 2441 DH5 0.15 <=20.97 Pass 2480 DH5 0.48 <=20.97 Pass Pi/4DQPSK SISO 2402 2DH5 -0.21 <=20.97 Pass 2441 2DH5 0.68 <=20.97 Pass 2480 2DH5 1.11 <=20.97 Pass 14 4. Carrier Frequency Separation 4.1 Test Result 4.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) Packet Type Channel Separation (MHz) 20dB Bandwidth (MHz) Limit (MHz) Verdict GFSK SISO HOPP DH5 1.000 1.063 >=0.709 Pass Pi/4DQPSK SISO HOPP 2DH5 0.989 1.351 >=0.901 Pass 15 4.2 Test Graph 4.2.1 Ant1 GFSK_DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV 16 5. Number of Hopping Frequencies 5.1 Test Result 5.1.1 HoppNum Mode TX Type Frequency (MHz) Packet Type Num of Hopping Frequencies Verdict ANT1 Limit GFSK SISO HOPP DH5 79 >=15 Pass Pi/4DQPSK SISO HOPP 2DH5 79 >=15 Pass 17 5.2 Test Graph 5.2.1 HoppNum GFSK_DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV 18 6. Time of Occupancy (Dwell Time) 6.1 Test Result 6.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) Packet Type Duration of Single Pulse (ms) Observation Period (s) Num of Pulse in Observation Period Dwell Time (ms) Limit (ms) Verdict GFSK SISO HOPP DH1 0.386 31.600 315 121.590 <=400 Pass DH3 1.642 31.600 154 252.868 <=400 Pass DH5 2.892 31.600 92 266.064 <=400 Pass Pi/4DQPSK SISO HOPP 2DH1 0.396 31.600 318 125.928 <=400 Pass 2DH3 1.646 31.600 154 253.484 <=400 Pass 2DH5 2.896 31.600 105 304.080 <=400 Pass 19 6.2 Test Graph 6.2.1 Ant1 GFSK_DH1_HOPP_Ant1_NTNV GFSK_DH1_HOPP_Ant1_NTNV 20 GFSK_DH3_HOPP_Ant1_NTNV GFSK_DH3_HOPP_Ant1_NTNV 21 GFSK_DH5_HOPP_Ant1_NTNV GFSK_DH5_HOPP_Ant1_NTNV 22 Pi/4DQPSK_2DH1_HOPP_Ant1_NTNV Pi/4DQPSK_2DH1_HOPP_Ant1_NTNV 23 Pi/4DQPSK_2DH3_HOPP_Ant1_NTNV Pi/4DQPSK_2DH3_HOPP_Ant1_NTNV 24 Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV 25 7. Unwanted Emissions In Non-restricted Frequency Bands 7.1 Test Result 7.1.1 Ref Mode TX Type Frequency (MHz) Packet Type ANT Level of Reference (dBm) GFSK SISO 2402 DH5 1 -1.11 2441 DH5 1 -0.26 2480 DH5 1 0.00 HOPP DH5 1 0.60 0.60 Pi/4DQPSK SISO 2402 2DH5 1 -1.11 2441 2DH5 1 -0.26 2480 2DH5 1 -0.10 HOPP 2DH5 1 0.27 0.27 7.1.2 CSE Mode TX Type Frequency (MHz) Packet Type ANT Level of Reference (dBm) Limit (dBm) Verdict GFSK SISO 2402 DH5 1 -1.11 -21.11 Pass 2441 DH5 1 -0.26 -20.26 Pass 2480 DH5 1 0.00 -20.00 Pass HOPP DH5 1 0.60 -19.40 Pass 0.60 -19.40 Pass Pi/4DQPSK SISO 2402 2DH5 1 -1.11 -21.11 Pass 2441 2DH5 1 -0.26 -20.26 Pass 2480 2DH5 1 -0.10 -20.10 Pass HOPP 2DH5 1 0.27 -19.73 Pass 0.27 -19.73 Pass 26 7.2 Test Graph 7.2.1 Ref GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV 27 GFSK_DH5_HCH_2480MHz_Ant1_NTNV GFSK_DH5_HOPP_Ant1_NTNV 28 GFSK_DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV 29 Pi/4DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV 30 Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV 31 7.2.2 CSE GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_LCH_2402MHz_Ant1_NTNV 32 GFSK_DH5_MCH_2441MHz_Ant1_NTNV GFSK_DH5_HCH_2480MHz_Ant1_NTNV 33 GFSK_DH5_HCH_2480MHz_Ant1_NTNV GFSK_DH5_HOPP_Ant1_NTNV 34 GFSK_DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV 35 Pi/4DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV Pi/4DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV 36 Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV Pi/4DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV 37 Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV Pi/4DQPSK_2DH5_HOPP_Ant1_NTNV

Shenzhen HTT Technology Co., Ltd. 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 FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. .................... : FCC ID. ........................................... : HTT202602355F01 2AOHU-K2PRO Compiled by ( position+printed name+signature) . : File administrators Supervised by ( position+printed name+signature) . : Project Engineer Approved by ( position+printed name+signature) . : RF Manager Date of issue .................................... : Mar. 03, 2026 Testing Laboratory Name .............. : Shenzhen HTT Technology Co.,Ltd. Address ............................................ : 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao’an District, Shenzhen, Guangdong, China Applicant’s name ........................... : Shenzhen Weile Electronics Co., Ltd. Address ............................................ : Room 602,Building 2,Zhuguang Innovative Technology Park,Taoyuan Street,Nanshan District,Shenzhen City, China Test specification ........................... : Standard ........................................... : FCC Part 15.247 Shenzhen HTT Technology Co.,Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HTT Technology Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HTT Technology Co.,Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Riding helmet headset Trade Mark ....................................... : N/A Manufacturer .................................. : Shenzhen Weile Electronics Co., Ltd. Model/Type reference ...................... : K2 Pro Listed Models ................................... : K2, K2 Pro Max Modulation ....................................... : GFSK, Π/4DQPSK Frequency ......................................... From 2402MHz to 2480MHz Ratings ............................................. : DC 3.7V From Battery and DC 5V From External Circuit Result ............................................... : PASS Report No.: HTT202602355F01 Page 2 of 36 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 T E S T R E P O R T Equipment under Test : Riding helmet headset Model /Type : K2 Pro Listed Models : K2, K2 Pro Max Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number is different for these model. Applicant : Shenzhen Weile Electronics Co., Ltd. Address : Room 602,Building 2,Zhuguang Innovative Technology Park,Taoyuan Street,Nanshan District,Shenzhen City, China Manufacturer : Shenzhen Weile Electronics Co., Ltd. Address : Room 602,Building 2,Zhuguang Innovative Technology Park,Taoyuan Street,Nanshan District,Shenzhen City, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: HTT202602355F01 Page 3 of 36 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 Contents 1 TEST STANDARDS .......................................................................................................................................... 4 2 SUMMARY ........................................................................................................................................................ 5 2.1 General Remarks .................................................................................................................................... 5 2.2 Product Description ................................................................................................................................. 5 2.3 Equipment Under Test ............................................................................................................................ 5 2.4 Short description of the Equipment under Test (EUT) ............................................................................ 5 2.5 EUT configuration .................................................................................................................................... 6 2.6 EUT operation mode ............................................................................................................................... 6 2.7 Block Diagram of Test Setup .................................................................................................................. 6 2.8 Related Submittal(s) / Grant (s) .............................................................................................................. 6 2.9 Modifications ........................................................................................................................................... 6 3 TEST ENVIRONMENT ...................................................................................................................................... 7 3.1 Address of the test laboratory ................................................................................................................. 7 3.2 Test Facility ............................................................................................................................................. 7 3.3 Environmental conditions .......…

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Shenzhen HTT Technology Co., Ltd. Report No.: HTT202602355 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 Product Name: Riding helmet headset Model No.: K2 Pro Test Setup Photo Radiated Emission Report No.: HTT202602355 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 RF Test ------End------