2ACXH-NC07TRUE WIRELESS STEREO EARPHONES

ASKA ELECTRONICS CO., LIMITED

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Application Details

Equipment Class: DSS - Part 15 Spread Spectrum Transmitter
Date of Grant: May 18, 2021
Application Purpose: Original Equipment
Date of Application: May 18, 2021
Equipment Note: TRUE WIRELESS STEREO EARPHONES
Frequency Range: 2402.00000000 - 2480.00000000
Company: ASKA ELECTRONICS CO., LIMITED
Country: Hong Kong

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Users Manual

样机测试：NC07测试时间2021/3/17-3/22 NO. 功能 Function操作 Operation LED 状态 LED Status 提示音 1 降噪开/通透模式/降噪关转换必须先开机（关机状态下长按 MFB键约1s/Long press the MFB key for about 1s under shutdown） ANC开白色指示灯亮 /ANC on white light is on 降噪模式/ 通透模式/ 降噪关 ANC on/AMBIENT/ANC off 单击NC/AMBIENT按键，打开降噪模式；单击NC/AMBIENT按键，切换到通透模式；单击 NC/AMBIENT按键，切换到降噪关模式/Click the NC/AMBIENT button to shift ANC mode/tran sparent mode/ANC off 2 降噪模式 /The noise reduction mode 1.ANC降噪可以与蓝牙同时使用 / 2.耳机有电时，ANC降噪也可以与AUX同时使用 1.ANC noise reduction can be used together with Bluetooth 2. When the earphone is powered, ANC noise reduction can also be used together with AUX 3 开机/Power On 关机状态下长按MFB键约3s，耳机进入待配对状态 /Long press the MFB key for about 1s under shutdown 白色指示灯常亮1s/The white light always goes on for 1s 开机 power on 4 关机/Power off 开机状态下长按MFB键约 3s/Long press the MFB key for about 3s when the machine is on 红色指示灯常亮1s 后熄灭/The red indicator light always goes on for 1 second and then goes off 关机 power off 5 配对连接成功/Paired connection successful 手机搜索耳机并连接/The phone searches for headphones and connects 蓝牙连接 bluetooth connected 6 连接断开/Connection is broken 手机和耳机的连接超出有效范围（＞10米）/Phone and earphone connection out of range (> 10 m) 蓝牙断开 bluetooth disconnec ted 7 Aux输入/Aux input 插入 line-in/Insert the line - in // 8 调节音量 /Adjust the volume 短按音量 + 按键增加音量 /Short press volume + button to increase volume // 9 调节音量 /Adjust the volume 短按音量 - 按键减小音量 /Short press volume - Button to reduce volume // 10 曲目选择/Songs to choose 双击音量 + 按键为下一曲 /Double-click the volume + button for the next song // 双击音量 - 按键为上一曲 /Double-click Volume - button for the previous track 11暂停/播放 Pause/Play 短按 MFB 按键 /Short press the MFB button // 12 接听/结束来电 Answer/end calls 短按 MFB 按键 /Short press the MFB button // 13 拒接电话 /Refuse to answer the phone 长按音量 + 键2 秒拒接电话 /Long press the volume + button for 2 seconds to reject calls // 14 恢复出厂设置 /factory data reset 充电状态，长按MFB键+音量加键 3s/When in charge, long press MFB + volume + 3s / 15 Reset /复位如果耳机在即使充满电后仍无法开启或在使用时无反应，请按照下述步骤将其复位：红色指示灯常亮 /The red indicator light is always on 用充电线将耳机连接至计算机的USB端口或USB电源适配器，红色指示灯亮起表示耳机已复位成功。 If the headset does not turn on even after full charge or does not respond during use, please follow the following steps to reset it:Connect the headset to the COMPUTER's USB port or USB power adapter with the charging cable. The red indicator lights up to indicate that the headset has been reset 16 低电报警/Low power alarm 电量是小于等于3.35V 红灯闪/The red light flashing 请充电 battery low 17 充电/charging 使用DC5V电源输入USB-C充电线对耳机充电/Use DC5V power to input USB-C charging cable to charge the headset 在充电过程中红色指示灯常亮,电池充满电后红色指示灯熄灭,白色灯常亮/The red indicator will / 18 固件升级 /The firmware update 插入USB-C，双击开机键进入 DFU 模式，通过电脑升级 /Insert USB-C, double- click the power button to enter DFU mode, and upgrade through the computer HID 设备 DFU 升级 /HID device DFU upgrade / 19 DUT 测试模式 /DUT test mode 1.配对状态同时三击MFB键红蓝指示灯同时快闪3 次 /The red and blue lights flash three times at the same time 2.完成DUT操作后需要重新插拔 USB线进行耳机充电复位 1. Three MFB keys at the same time2. After DUT operation, it is necessary to replug and unplug the 20 兼容/Compatible with 手机，电脑，平板电脑 /Phones, computers, 21 电量显示/Power display iPhone, iPad设备，Android 8.0 以上/IPhone, iPad device, Android 8.0 above 4.2V 100% 4V 80% 3.8V 60% 3.6V 40% 3.35V 20% 备注开机超过 10分钟未连接蓝牙音频设备自动关机，如连音频设备则保证不能自动关机/The Bluetooth audio device will shut down automatic ally if it is not connected to the audio device for more than 10 minutes. If it is connected to the audio device, it will not shut down 每3分钟提示一次 /Prompt every 3 minutes 先将USB线一端插入电脑另一端插入耳机 /Plug one end of the USB cable into the computer and plug in the headset

Cover Letter(s)

MAY 10 ， 2021 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID:2ACXH-NC07 Product Name:NC07 Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...)  Schematics Block diagram Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signature> ： Name ： Roc Lu Title ： CEO Company ： ASKA ELECTRONICS CO., LIMITED

Cover Letter(s)

DATE:2021/5/10 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint BlueAsia of Technical Serivices(shenzhen) Co,ltd, (Name of Agent company name and address) to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with ASKA ELECTRONICS CO., LIMITED，ROOM A 11/F HOLEE COMMERCIAL BUILDING 38-44 D' AGUILAR STREET CENTRAL HK (Applicant Name and address) <Signature> Name ： Roc Lu Title ： CEO Company ： ASKA ELECTRONICS CO., LIMITED Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China

External Photos

Model No.: NC07

ID Label/Location Info

Active Noise Cancelling Wireless headphone Model: NC07 FCC ID: 2ACXH-NC07 Input: 5V500mA Importer:XXXXXX Address:XXXXXX Manufacturer: ASKAElectronicsCo.,Ltd Address: No.5PuxinRoad,KeyuanchengIndustrial,TangxiaTown, Dongguan,Guangdong,China,523718 Made In China

Internal Photos

Model No.: NC07

RF Exposure Info

RF Exposure Evaluation Statement Product Name: Active Noise Cancelling Wireless headphone Model No.：NC07 FCC ID：2ACXH-NC07 1.1 RF Exposure Compliance Requirement 1.1.1 Standard Requirement According to KDB447498D01 General RF Exposure Guidance v06 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 Exclusion Threshold condition, listed below, is satisfied. 1.1.2 Limits 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 17 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 1.1.3 EUT RF Exposure Operational Mode: EDR （8-DPSK worst case） Channel Maximum Peak Conducted Output Power (dBm) Tune up tolerance (dB) Maximum tune-up Power Calculated value Exclusion threshold (dBm) (mW) 2402MHZ 7.4 ±1 8.40 6.92 2.14 3.0 2441MHz 6.79 ±1 7.79 6.01 1.88 2480MHz 7.03 ±1 8.03 6.35 2.00 Conclusion: the calculated value ≤3.0, SAR is exempted.

Test Report

Report No.: BLA-EMC-202104-A0402 Page 48 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 10 APPENDIX Appendix1 10.1 APPENDIX A: 20DB EMISSION BANDWIDTH Test Result TestMode Antenna Channel 20db EBW[MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict DH1 Ant1 2402 1.107 2401.433 2402.540 --- PASS 2441 1.101 2440.436 2441.537 --- PASS 2480 1.101 2479.436 2480.537 --- PASS 2DH1 Ant1 2402 1.398 2401.280 2402.678 --- PASS 2441 1.395 2440.277 2441.672 --- PASS 2480 1.401 2479.280 2480.681 --- PASS 3DH1 Ant1 2402 1.362 2401.301 2402.663 --- PASS 2441 1.362 2440.301 2441.663 --- PASS 2480 1.359 2479.307 2480.666 --- PASS Report No.: BLA-EMC-202104-A0402 Page 49 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Test Graphs DH1_Ant1_2402 DH1_Ant1_2441 DH1_Ant1_2480 Report No.: BLA-EMC-202104-A0402 Page 50 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 2DH1_Ant1_2402 2DH1_Ant1_2441 Report No.: BLA-EMC-202104-A0402 Page 51 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 2DH1_Ant1_2480 3DH1_Ant1_2402 Report No.: BLA-EMC-202104-A0402 Page 52 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 3DH1_Ant1_2441 3DH1_Ant1_2480 Report No.: BLA-EMC-202104-A0402 Page 53 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Report No.: BLA-EMC-202104-A0402 Page 54 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 10.2 APPENDIX C: MAXIMUM CONDUCTED OUTPUT POWER Test Result TestMode Antenna Channel Result[dBm] Limit[dBm] Verdict DH1 Ant1 2402 4.03 <=20.97 PASS 2441 4.31 <=20.97 PASS 2480 4.41 <=20.97 PASS 2DH1 Ant1 2402 6.7 <=20.97 PASS 2441 6.56 <=20.97 PASS 2480 6.38 <=20.97 PASS 3DH1 Ant1 2402 7.4 <=20.97 PASS 2441 6.79 <=20.97 PASS 2480 7.03 <=20.97 PASS Report No.: BLA-EMC-202104-A0402 Page 55 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Test Graphs DH1_Ant1_2402 DH1_Ant1_2441 DH1_Ant1_2480 Report No.: BLA-EMC-202104-A0402 Page 56 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 2DH1_Ant1_2402 2DH1_Ant1_2441 Report No.: BLA-EMC-202104-A0402 Page 57 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 2DH1_Ant1_2480 3DH1_Ant1_2402 Report No.: BLA-EMC-202104-A0402 Page 58 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 3DH1_Ant1_2441 3DH1_Ant1_2480 Report No.: BLA-EMC-202104-A0402 Page 59 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Report No.: BLA-EMC-202104-A0402 Page 60 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 10.3 APPENDIX D: CARRIER FREQUENCY SEPARATION Test Result TestMode Antenna Channel Result[MHz] Limit[MHz] Verdict DH1 Ant1 Hop 1.13 >=1.107 PASS 2DH1 Ant1 Hop 1.002 >=0.934 PASS 3DH1 Ant1 Hop 1.172 >=0.908 PASS Report No.: BLA-EMC-202104-A0402 Page 61 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Test Graphs DH1_Ant1_Hop 2DH1_Ant1_Hop 3DH1_Ant1_Hop Report No.: BLA-EMC-202104-A0402 Page 62 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Report No.: BLA-EMC-202104-A0402 Page 63 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 10.4 APPENDIX E: TIME OF OCCUPANCY Test Result TestMode Antenna Channel BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH1 Ant1 Hop 0.39 330 0.127 <=0.4 PASS DH3 Ant1 Hop 1.64 170 0.279 <=0.4 PASS DH5 Ant1 Hop 2.89 110 0.318 <=0.4 PASS Report No.: BLA-EMC-202104-A0402 Page 64 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Test Graphs DH1_Ant1_Hop DH3_Ant1_Hop Report No.: BLA-EMC-202104-A0402 Page 65 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com DH5_Ant1_Hop Report No.: BLA-EMC-202104-A0402 Page 66 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Report No.: BLA-EMC-202104-A0402 Page 67 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 10.5 APPENDIX F: NUMBER OF HOPPING CHANNELS Test Result TestMode Antenna Channel Result[Num] Limit[Num] Verdict DH1 Ant1 Hop 79 >=15 PASS 2DH1 Ant1 Hop 79 >=15 PASS 3DH1 Ant1 Hop 79 >=15 PASS Report No.: BLA-EMC-202104-A0402 Page 68 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Test Graphs DH1_Ant1_Hop 2DH1_Ant1_Hop 3DH1_Ant1_Hop Report No.: BLA-EMC-202104-A0402 Page 69 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com Report No.: BLA-EMC-202104-A0402 Page 70 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 10.6 APPENDIX G: BAND EDGE MEASUREMENTS Test Result TestMode Antenna ChName Channel RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH1 Ant1 Low 2402 4.45 -48.78 <=-15.56…

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Test Report

Page 1 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Add: Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com TEST REPORT Product Name : Active Noise Cancelling Wireless headphone Brand Mark : N/A Model No. : NC07 FCC ID : 2ACXH-NC07 Report Number : BLA-EMC-202104-A0402 Date of Sample Receipt : 2021/4/9 Date of Test : 2021/4/9 to 2021/4/23 Date of Issue : 2021/4/27 Test Standard : 47 CFR Part 15, Subpart C 15.247 Test Result : Pass Prepared for: ASKA ELECTRONICS CO.,LIMITED ROOM A 11/F HOLEE COMMERCIAL BUILDING 38-44 D＇A GUILAR STREET CENTEAL HK Prepared by: BlueAsia of Technical Services(Shenzhen) Co.,Ltd. Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China TEL: +86-755-23059481 Compiled by: Review by: Approved by: Date: 2021/4/27 Report No.: BLA-EMC-202104-A0402 Page 2 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com REPORT REVISE RECORD Version No. Date Description 00 2021/4/27 Original Report No.: BLA-EMC-202104-A0402 Page 3 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com TABLE OF CONTENTS 1 TEST SUMMARY ........................................................................................................................................6 2 GENERAL INFORMATION .........................................................................................................................7 3 GENERAL DESCRIPTION OF E.U.T. .........................................................................................................7 4 TEST ENVIRONMENT ................................................................................................................................8 5 TEST MODE ................................................................................................................................................8 6 MEASUREMENT UNCERTAINTY ..............................................................................................................8 7 DESCRIPTION OF SUPPORT UNIT...........................................................................................................9 8 LABORATORY LOCATION .........................................................................................................................9 9 TEST INSTRUMENTS LIST ..................................................................................................................... 10 1 ANTENNA REQUIREMENT ..................................................................................................................... 14 1.1 CONCLUSION ............................................................................................................................................................ 14 2 RADIATED SPURIOUS EMISSIONS ....................................................................................................... 15 2.1 LIMITS ................................................................................................................................................................... 15 2.2 BLOCK DIAGRAM OF TEST SETUP .......................................................................................................................... 16 2.3 PROCEDURE .......................................................................................................................................................... 16 2.4 TEST DATA .............................................................................................................................................................. 18 3 RADIATED EMISSIONS WHICH FALL IN THE RESTRICTED BANDS................................................. 26 3.1 LIMITS ................................................................................................................................................................... 26 3.2 BLOCK DIAGRAM OF TEST SETUP .......................................................................................................................... 27 3.3 PROCEDURE .......................................................................................................................................................... 27 3.4 TEST DATA .............................................................................................................................................................. 29 4 CONDUCTED SPURIOUS EMISSIONS .................................................................................................. 33 4.1 LIMITS ................................................................................................................................................................... 33 4.2 BLOCK DIAGRAM OF TEST SETUP .......................................................................................................................... 33 4.3 TEST DATA .............................................................................................................................................................. 34 5 CONDUCTED BAND EDGES MEASUREMENT ..................................................................................... 35 5.1 LIMITS ................................................................................................................................................................... 35 5.2 BLOCK DIAGRAM OF TEST SETUP .......................................................................................................................... 35 5.3 TEST DATA .............................................................................................................................................................. 36 Report No.: BLA-EMC-202104-A0402 Page 4 of94 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 E…

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Test Setup Photos

Model No.: NC07