2A7Z4-NBGTuner True Wireless Bluetooth Earbuds

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Ningbo Fulman Communication Technology Co., Ltd Address: No.98 Yuanzhong Road, Xiangshan Economic Development Zone, Ningbo, Zhejiang Province, China Product Name: Tuner True Wireless Bluetooth Earbuds Model Number: NBG FCC Identifier: 2A7Z4-NBG 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: Lingyun Shen Date: 11/17/22 Title: General manager Signature of applicant:

C5266091_X10_Ed.1 1/1 Ningbo Fulman Communication Technology Co., Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 11/17/2022 Subject: Request for Confidentiality FCC ID: 2A7Z4-NBG 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: Lingyun Shen Date: 11/17/2022 Title: General manager

Page1of4 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] Appendix - Ext Photos Model: NBG Photo 1 Photo 2 Page2of4 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] Photo 3 Photo 4 Page3of4 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] Photo 5 Photo 6 Page4of4 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] Photo 7 Photo 8 ----End of Report----

Ningbo Fulman Communication Technology Co., Ltd version02 11/17/2022 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: 2A7Z4-NBG Sincerely, Signature: Name: Lingyun Shen Title: General manager Company: Ningbo Fulman Communication Technology Co., Ltd

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 - Int Photos Model: NBG Photo 1 Photo 2 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] Photo 3 Photo 4 ANT 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] Photo 5 Photo 6 ----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.: MTi221020018-04E3 Date of issue: 2022-11-15 Applicant: Ningbo Fulman Communication Technology Co., Ltd Product: Tuner True Wireless Bluetooth Earbuds Model(s): NBG FCC ID: 2A7Z4-NBG Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 6- Report No.: MTi221020018-04E3 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.: MTi221020018-04E3 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 RESULT CERTIFICATION Applicant’s name .................... : Ningbo Fulman Communication Technology Co., Ltd Address .................................. : No.98 Yuanzhong Road, Xiangshan Economic Development Zone, Ningbo, Zhejiang Province, China Manufacturer's Name ............. : Ningbo Fulman Communication Technology Co., Ltd Address .................................. : No.98 Yuanzhong Road, Xiangshan Economic Development Zone, Ningbo, Zhejiang Province, China Product description Product name ........................... : Tuner True Wireless Bluetooth Earbuds Trademark ............................. : Model Name .......................... : NBG Series Model ........................... N/A Standards ............................... : N/A Test procedure ....................... : KDB 447498 D01 v06 Date of Test Date (s) of performance of tests ............ : 2022-11-07 ~ 2022-11-15 Test Result ............................................. : Pass This device described above has been tested by Shenzhen Microtest Co., Ltd. and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. Test Engineer : (David Lee) Reviewed By: : (Leon Chen) Approved By: : (Tom Xue) - Page 4 of 6- Report No.: MTi221020018-04E3 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.: MTi221020018-04E3 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 exc…

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Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel : (8 6-755)88850135 Fax: (86-755) 88850136 We b : www.mtitest.com E-mail: [email protected] Test Report Report No.: MTi221020018-04E1 Date of issue: 2022-11-15 Applicant: Ningbo Fulman Communication Technology Co., Ltd Product: Tuner True Wireless Bluetooth Earbuds Model(s): NBG FCC ID: 2A7Z4-NBG Shenzhen Microtest Co., Ltd. http://www.mtitest.com Page 2 of 55 Report No.: MTi221020018-04E1 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] 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 55 Report No.: MTi221020018-04E1 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] 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 Te st 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 ................................................................................................................................ 23 6.5 Maximum conducted output power .................................................................................................................. 24 6.6 Carrier frequency separation ............................................................................................................................ 25 6.7 Time of occupancy............................................................................................................................................ 26 6.8 Number of hopping channels ........................................................................................................................... 27 6.9 Band edge (Conducted) ................................................................................................................................... 28 6.10 Conducted spurious emissions ...................................................................................................................... 29 Appendix A: 20dB Emission Bandwidth ............................................................................................. 30 Appendix B: Maximum conducted output power ............................................................................... 33 Appendix C: Carrier frequency separation ......................................................................................... 36 Appendix D: Time of occupancy ......................................................................................................... 38 Appendix E: Number of hopping channels......................................................................................... 43 Appendix F: Band edge measurements .............................................................................................. 45 Appendix G: Conducted Spurious Emission ...................................................................................... 48 Photographs of the Test Setup ............................................................................................................ 54 Photographs of the EUT....................................................................................................................... 55 Page 4 of 55 Report No.: MTi221020018-04E1 Address: 101, No.7, Zone 2, Xinxing …

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嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 1 - 产 品 技 术 规 格 书 SPECIFICATION 拟制Prepared by： 审核Checked by ： 批准Approved by： 送样日期Formed On 产品版本Document Version ( V1. 0 ) 产品型号 PART NO： LA31P2450-G8M 客户料号CUSTOMER PART NO： 客户确认CUSTOMER APPROVED BY： 确认日期APPROVED DATE： 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 2 - 目 录 Table of contents 规格书版本更改记录 Version rejigger track record ..............................3 1. 概述 Introduction..................................................................4 2. 型号 Part Number...............................................................4 3. 外型尺寸及测试板焊盘尺寸 D i m e n s i o n s... ... ... ... ... ... ...4～5 4. 测试电路和匹配电路 Evaluation Board and Matching Circuits............5 5. 电气性能 Electrical Characteristics..........................................6 6. 特性曲线 Characteristic curve...................................................6 7. 方向图 Radiation Pattern...................................................7～8 8. 可靠性试验 Dependability Test..........................................9～10 9. 回流焊温度 Reflow Soldering Standard Condition.....................10 10. 包装尺寸 Packaging and Dimensions ....................................11 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 3 - 产品规格书版本更改记录 Version rejigger track record 版本号 Version 更改记录 Rejigger 拟制 Prepared 批准 Approve 日期 Date V1.0 首次发行 潘枫 卢冠宇 2019/07/12 备注： 1、更改产品电性能指标时，版本号需更换（V1.0换为V2.0、V3.0......）； 2、更改产品测试方法（包括可靠性测试条件），或更改使用条件时，当前版本号加系列（V1.0 换为V1.1 、V1.2......）。 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 4 - 产品尺寸/Size：3.2×1.6×0.5 1. 概述 INTRODUCTION "佳利"微波多层陶瓷天线LA系列产品设计用于WLAN、Wi-Fi、蓝牙 、PHS，手机 多频天线, FM等小体积SMD片式设计。 "GLEAD" Microwave Multi-Layer Ceramic Antenna LA series are designed to be used in WLAN、Wi -Fi、Bluetooth、PHS、 Multiple-band Mobile phone antenna, FM, etc and compact size SMD chip design. 2. 型号 Part Number LA 31 P 2 450 - G8M 3. 外型尺寸 Dimensions（Unit：mm） Symbols L W T A Dimensions 3.2 +/-0.2 1.6 +/-0.2 0.5 +/-0.1 0.4+/-0.1 Number Terminal Name ① INPUT ② NC 天线频率/ Antenna Frequency: 2 450 MHz 产品设计结构P型 / Printing Design Series 多层结构天线 / Multi-layer Antenna 产品名称，编号G8M / Pro duct Name: G8M ( Top View ) L w ① ② ( Side View ) T ( Bottom View ) A 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 5 - 4. 测试电路和匹配电路 Evaluation Board and Matching Circuits Unit:mm 50ΩFeeding Line GND VIA πType Matching Network Clearance Area 5.0 6.0 1. 25 1.8 2. 25 0.740.74 3.34 3.77 1.0 1. 63 5.6nH 0.5pF 5.6nH 0.5pF 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 6 - 5.电气性能Electrical Characteristics 6.特性曲线Characteristic curve No. Item （项目） Specifications （特性） 5.1 5.2 Band Width 通带宽度 100 MHz typ. 5.3 Peak Gain 峰值增益 5.54 dBi 5.4 Return Loss 回波损耗 ≤2.0 5.5 Polarization 极化方式 Linear 线性 5.6 Azimuth Beam width 方位角 Omni-directional 全向 5.7 Impedance 阻抗 50 歐姆 Frequency Range 频率范围 2 400~2500MHz 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 7 - 7.方向图 coordinates： 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 8 - 3D Radiation Pattern(2450MHz) 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 9 - 8 可靠性试验 Dependability Test 基准条件：温度范围 Temperature range 25±5°C 相对湿度范围 Relative Humidity range 55~75%RH 工作温度 Operating Temperature range -40°C~+85°C 贮藏温度 Storage Temperature range - 40°C~+85°C 8.1 耐振动 Vibration Resist 在振动频率为10~55Hz振幅为1.5mm 沿X.Y.Z方向各振动2小时后测试需符合电气性能指标。 The device should fulfill the electrical specification after applied to the vibration of 10 to 55Hz with amplitude of 1.5mm for 2 hours each in X , Y and Z directions. 8.2 耐跌落冲击 Drop Shock 在100cm高度处按X，Y，Z三个面分别自由跌落在木制地板上共3次后，要求无机械损伤。 The device should have no mechanical damage after dropping onto the hard wooden board from the height of 100cm for 3 times each facet of the 3 dimensions of the device. 8.3 耐焊接热 Solder Heat Proof 能承受经120~150°C的温度预热120秒后，在255°C+10°C的焊锡浸5±0.5秒，或300°C-10°C的 电烙铁焊接3±0.5秒，焊接面无损伤。 The device should be satisfied after preheating at 120°C~150°C for 120 seconds and dipping in soldering Sn at 255°C+10°C for 5±0.5 seconds，or electric iron 300°C-10°C for 3±0.5 seconds， without damnify. 8.4 推 力试验 Adhesive Strength of Termination 在产品电极端子上或表面上可承受5N(≦0603)；10N(>0603)水平推力10±1秒而无明显外观损坏 与电极移位。 The device have no remarkable damage or removal of the termination after horizontal force of 5N(≦0603)；10N(>0603)with 10±1 seconds. 8.5 耐弯曲试验 Bending Resist Test 将产品按图焊在1.6±0.2mm或0.8±0.1mm的 PC B 板中间，由箭头方向施力：1mm/S，弯曲距 离：1.5mm，保持5±1S，产品金属层无脱落。 Weld the product to the center part of the PCB with the thickness 1.6±0.2mm or 0.8±0.1mm as the illustration shows, and keep exerting force arrow-ward on it at speed of :1mm/S , and hold for 5±1S at the position of 1.5mm bending distance , so far , any peeling off of the product metal coating should not be detected . 嘉兴佳利电子有限公司 http://www.glead.com.cn 阿里巴巴 http://zydq.en.alibaba.com JIA XING GLEAD ELECTRONICS CO., LTD - 10 - 8.6 耐湿热特性 Moisture Proof 在温度为60±2°C，相对湿度90~95%的恒温湿箱中放置96小时，在常温中恢复1~2小时 后测试，测试需符合电气性能指标。 The device should fulfill the electrical specification after exposed to the temperature 60±2°Cand the relative humidity 90~95% RH for 96 hours and 1~2 hours recovery time under normal condition. 8.7 高温特性 High Temperature Endurance 在温度为85±5°C的恒温箱中放置96±2小时，在常温中恢复1~2小时后测试。测试需符 合电气性能指标。 The device should fulfill the electrical specification after exposed to temperature 85±5°Cfor 96±2 hours and 1~2 hours recovery time under normal temperature. 8.8 低温特性 Low Temperature Endurance 在温度为-40°C±5°C低温箱中放置96±2小时后恢复1~2小时，测试需符合电气性能指标。 The device should fulfill the electrical specification after exposed to the temperature -40°C±5°C for 96±2 hours and to 2 hours recovery…

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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: NBG Radiated emissions – Below 1 GHz Radiated emissions – Above 1 GHz ----End of Report----