2ADYY-BD02Wireless Earphone

User Manual Wireless Earphone Model: BD02 Hereby, TECNO MOBILE LIMITED. Declares that this Wireless Earphone is in compliance with the essential requirements and other relevant provisions of directive 2014/53/EU. 11121314 1817 1615 19202122 CAUTION 1. Risk of explosion if battery is replaced by an incorrect type, dispose of used batteries according to the instructions. 2. The product shall only be connected to a USB interface of version USB2.0 3. Adapter shall be installed near the equipment and shall be easily accessible. 4. EUT Temperature:0+45 FCC Warning: changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna. -- Increase the separation between the equipment and receiver. -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. Operating Frequency: BT: 2402-2480MHz Modulation mode: GFSK, π/4- DQPSK, 8DPSK RF output power: BT: 4.60dBm 9 EU DECLARATION OF CONFORMITY in accordance with 1.For the following Radio equipment: Model: BD02 Product: Wireless Earphone Trade name or Brand: TECNO Software / Hardware number: V1.5/ V1.1 2. Name and address of the manufacturer or his authorised representative: Manufacturer: TECNO MOBILE LIMITED Add: FLAT 39 8/F BLOCK D WAH LOK INDUSTRIAL CENTRE 31-35 SHAN MEI STREET FOTAN NT. 3. This declaration of conformity is issued under the sole responsibility of the Manufacturer. 4. Object of the declaration (identification of the radio equipment allowing traceability; it may include a colour image of sufficient clarity where necessary for the identification of the radio equipment): 5. The object of the declaration described above is in conformity with the relevant Union harmonization legislation: Directive 2014/53/EU (RED) 6. References to the relevant harmonised standards used or references to the other technical specifications in relation to which conformity is declared: Article 3.1a Health: EN 62479:2010 Article 3.1a Electrical Safety: EN62368-1:2014+A11:2017 Article 3.1b: ETSI EN 301 489-1 V2.2.3 (2019-11) ETSI EN 301 489-17 V3.2.4 (2020-09) Article 3.2: ETSI EN 300 328 V2.2.2 (2019-07) 7. Notified Body Name: Eurofins Electrical and Electronic Testing NA, Inc. Notified Body Number: 0980 Notified Body Assessment Performed: Module B/C on Article 3.1a, 3.1b, 3.2 and 3.3 8 10 On behalf of: (signature): Manufacturer: TECNO MOBILE LIMITED Add: FLAT 39 8/F BLOCK D WAH LOK INDUSTRIAL CENTRE 31-35 SHAN MEI STREET FOTAN NT. (place and date of issue): Shenzhen, 2021-04-12 (name, function): Yiting Luo/ Manager Technical File Identification Number: N/A 8. Where applicable, description of accessories and components, including software, which allow the radio equipment to operate as intended and covered by the EU declaration of conformity: User instructions are provided in the User Manual. The Software and Hardware versions are specified above. 9. Additional information: Referring to Article 10.2 of the Directive, this equipment is so constructed that it can be operated in all Member States, without infringing applicable requirements on the use of radio spectrum. Referring to Article 10.10 of the Directive, there are no restrictions on putting this equipment into service or of requirements for authorisation of use. Please refer to the User Manual for details. 上下对折后，现包芯折 RF Exposure Statement The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

TECNO MOBILE LIMITED Agent Authorization Letter (May 06,2021) Eurofins MET Labs 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (WORLD STANDARDIZATION CERTIFICATION & TESTING GROUP (SHENZHEN) CO., LTD.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Yiting,Luo / Certified Engineer

TECNO MOBILE LIMITED Long Term Confidentiality Request Letter (May 06,2021) Eurofins MET Labs 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Wireless Earphone /BD02 # 2ADYY-BD02#) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description - BOM required to be submitted with this application be permanently withheld from public review. The above-mentioned documents belong to internal documents, is our proprietary information, that could never get into the possession of our competition. Please contact me if there is any information you may need. Sincerely, Client’s name / title : Yiting,Luo / Certified Engineer Company Name: TECNO MOBILE LIMITED Contact information / address: [email protected] / FLAT 39 8/F BLOCK D WAH LOK INDUSTRIAL CENTRE 31-35 SHAN MEI STREET FOTAN NT

TECNO MOBILE LIMITED Short Term Confidentiality Request Letter (May 06,2021) MET Laboratories, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Short Term Confidentiality Request For(Wireless Earphone /BD02# 2ADYY-BD02#) To Whom It May Concern: In accordance with sections 0.457 and 0.459 of CFR 47, <TECNO MOBILE LIMITED. >. requests short-term Confidentiality of following sections of this application for a period of 180 days after grant is issued. Test setup photos External photos Internal photos User’s manual These documents contain detailed system and equipment descriptions and related information about the product, which < TECNO MOBILE LIMITED. > considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, <TECNO MOBILE LIMITED.> feels that this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Name: Yiting,Luo Function: Certified Engineer Signature:

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Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-BD02 RADIO FREQUENCY EXPOSURE Limit According to section 4.3.1 of KDB 447498 D01 General RF Exposure Guidance v06, SAR evaluation is required if the separation distance between the user and/or bystander and the antenna and/or radiating element of the device is less than or equal to 20 cm, except when the device operates at or below the applicable output power level (adjusted for tune-up tolerance) for the specified separation distance defined in Appendix A. Appendix A SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm MHz 5 10 15 20 25 mm 150 39 77 116 155 194 SAR Test Exclusion Threshold (mW) 300 27 55 82 110 137 450 22 45 67 89 112 835 16 33 49 66 82 900 16 32 47 63 79 1500 12 24 37 49 61 1900 11 22 33 44 54 2450 10 19 29 38 48 3600 8 16 24 32 40 5200 7 13 20 26 33 5400 6 13 19 26 32 5800 6 12 19 25 31 MHz 30 35 40 45 50 mm 150 232 271 310 349 387 SAR Test Exclusion Threshold (mW) 300 164 192 219 246 274 450 134 157 179 201 224 835 98 115 131 148 164 900 95 111 126 142 158 1500 73 86 98 110 122 1900 65 76 87 98 109 2450 57 67 77 86 96 3600 47 55 63 71 79 5200 39 46 53 59 66 5400 39 45 52 58 65 5800 37 44 50 56 62 Note: Manufacturer declared that the maximum antenna gain is 2.17dBi (Max.). This report shall not be reproduced except in full, without the written approval of WORLD STANDARDIZATION CERTIFICATION & TESTING GROUP (SHENZHEN) CO., LTD. Page 1 of 2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-BD02 Conducted Power Results Test Mode Channel Frequency (MHz) Measured Peak Output Power (dBm) GFSK 00 2402 1.09 39 2440 -0.05 78 2480 -0.80 π/4-DQPSK 00 2402 0.91 39 2441 -0.21 78 2480 -0.89 8-DPSK 00 2402 0.94 39 2441 -0.13 78 2480 -0.82 Manufacturing tolerance GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.5 0.5 0.0 Tolerance ±(dB) 1.0 1.0 1.0 π/4-DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 8-DPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 Results Test Mode Channel Frequency (MHz) Max. Tune Up Power (dBm, Peak) Max. Eirp including Tune Up (dBm, Peak) Max. Eirp including Tune Up (mW, Peak) Exemption Limit (mW) GFSK 2402 1.5 3.67 2.33 10 2441 1.5 3.67 2.33 10 2480 1.5 3.67 2.33 10 π/4-DQPSK 2402 1.0 3.17 2.07 10 2441 1.0 3.17 2.07 10 2480 1.0 3.17 2.07 10 8-DPSK 2402 1.0 3.17 2.07 10 2441 1.0 3.17 2.07 10 2480 1.0 3.17 2.07 10 The antenna gain of the EUT for BT is 2.17dBi (Max). the Maximum Eirp is used for Routine Evaluation Exemption according to section 4.3.1 of KDB 447498 D01. So, the SAR evaluation is not required. This report shall not be reproduced except in full, without the written approval of WORLD STANDARDIZATION CERTIFICATION & TESTING GROUP (SHENZHEN) CO., LTD. Page 2 of 2

Report No.:WSCT-A2LA-R&E210400003A-BLE Page 2 of 79 Table of Contents 1. GENERAL INFORMATION 3 1.1 GENERAL DESCRIPTION OF EUT 4 1.2 FACILITIES AND ACCREDITATIONS 5 1.3 DESCRIPTION OF TEST MODES 6 1.4 TABLE OF PARAMETERS OF TEXT SOFTWARE SETTING 7 1.5 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 8 2. SUMMARY OF TEST RESULTS 9 3. MEASUREMENT INSTRUMENTS 10 4. EMC EMISSION TEST 11 4.1 CONDUCTED EMISSION MEASUREMENT 11 4.2 RADIATED EMISSION MEASUREMENT 15 5. NUMBER OF HOPPING CHANNEL 29 5.1 APPLIED PROCEDURES / LIMIT 29 5.2 TEST RESULTS 30 6. AVERAGE TIME OF OCCUPANCY 32 6.1 APPLIED PROCEDURES / LIMIT 32 6.2 TEST RESULTS 34 7. HOPPING CHANNEL SEPARATION MEASUREMENT 40 7.1 APPLIED PROCEDURES / LIMIT 40 7.2 TEST RESULTS 41 8. BANDWIDTH TEST 50 8.1 APPLIED PROCEDURES / LIMIT 50 8.2 TEST RESULTS 51 9. PEAK OUTPUT POWER TEST 60 9.1 APPLIED PROCEDURES / LIMIT 60 9.2 TEST RESULTS 61 10. 100KHZ BAND EDGES MEASUREMENT 67 10.1 APPLIED PROCEDURES / LIMIT 67 11. ANTENNA APPLICATION 77 11.1 ANTENNA REQUIREMENT 77 12. TEST SETUP PHOTOGRAPHS 78 Report No.:WSCT-A2LA-R&E210400003A-BLE Page 4 of 79 1.1 GENERAL DESCRIPTION OF EUT Equipment Type: Wireless Earphone Model No.: BD02 Additional Model: N/A Trade Mark TECNO Software version: V1.1 Hardware version: V1.5 Extreme Temp. Tolerance: 0°Cto + 45°C Battery information: N/A Adapter Information: Charge box Battery: Li-ion Battery : 602030 Rated Voltage: 3.7V Rated Capacity: 300mAh Earphone Battery: Li-ion Battery :501012 Rated Voltage: 3.7V Rated Capacity: 40mAh Operating Frequency 2402-2480MHz(TX/RX) Channels 79 Channel Spacing 1MHz Modulation Type GFSK, π/4-DQPSK, 8-DPSK for BR+EDR Version 3.0 Antenna Type: Portable Equipment Antenna gain: 2.17dBi Note: N/A stands for no applicable. Models difference N/A Report No.:WSCT-A2LA-R&E210400003A-BLE Page 5 of 79 1.2 FACILITIES AND ACCREDITATIONS All measurement facilities used to collect the measurement data are located at Building A-B, Baoshi Science & Technology Park, Baoshi Road, Bao’an District, Shenzhen, Guangdong, China of the WORLD STANDARDIZATION CERTIFICATION & TESTING GROUP (SHENZHEN) CO., LTD. The sites are constructed in conformance with the requirements of ANSI C63.4 and CISPR Publication 22. All receiving equipment conforms to CISPR Publication 16-1, “Radio Interference Measuring Apparatus and Measurement Methods.” 1.2.1 ACCREDITATIONS China National Accreditation Service for Conformity Assessment (CNAS) Registration number NO: L3732 American Association for Laboratory Accreditation(A2LA) Registration NO：5768.01 Copies of granted accreditation certificates are available for downloading from our web site, http://www.wsct-cert.com 1.2.2 TEST DESCRIPTION 1.2.2 1MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ±U，where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2，providing a level of confidence of approximately 95 %。 No. Item Uncertainty 1 Conducted Emission Test ±3.2dB 2 RF power,conducted ±0.16dB 3 Spurious emissions,conducted ±0.21dB 4 All emissions,radiated(<1G) ±4.7dB 5 All emissions,radiated(>1G) ±4.7dB 6 Temperature ±0.5°C 7 Humidity ±2% Report No.:WSCT-A2LA-R&E210400003A-BLE Page 6 of 79 1.3 DESCRIPTION OF TEST MODES To investigate the maximum EMI emission characteristics generates from EUT, the test system was pre-scanning tested base on the consideration of following EUT operation mode or test configuration mode which possible have effect on EMI emission level. Each of these EUT operation mode(s) or test configuration mode(s) mentioned above was evaluated respectively. Modulation type Mode 1Mbps Mode 1、Mode 2、Mode 3、Mode 4 2Mbps 3Mbps Pretest Mode Description Mode 1 CH00 Mode 2 CH39 Mode 3 CH78 Mode 4 Normal Hopping For Conducted Emission Final Test Mode Description Mode 4 Normal Hopping For Radiated Emission Final Test Mode Description Mode 1 CH00 Mode 2 CH39 Mode 3 CH78 Mode 4 Normal Hopping Note: (1) The measurements are performed at the highest, middle, lowest available channels. (2)The data rate was set in 1Mbps,2 Mbps,3 Mbps for radiated emission due to the highest RF output power. (3) Record the worst case of each test item in this report. Report No.:WSCT-A2LA-R&E210400003A-BLE Page 7 of 79 1.4 TABLE OF PARAMETERS OF TEXT SOFTWARE SETTING During testing channel & power controlling software provided by the customer was used to control the operating channel as well as the output power level. The RF output power selection is for the setting of RF output power expected by the customer and is going to be fixed on the firmware of the final end product power parameters of FHSS Test software Version N/A Frequency 2402 MHz 2441 MHz 2480 MHz Parameters(1Mbps) DEF DEF DEF Parameters(2Mbps) DEF DEF DEF Parameters(3Mbps) DEF DEF DEF 1.4.1CONFIGURATION OF SYSTEM UNDER TEST Mode 1: Mode 2: (EUT: Wireless Earphone) EUT EUT PC 0.2m USB cable Adapter 1.2m Power cable Report No.:WSCT-A2LA-R&E210400003A-BLE Page 8 of 79 1.5 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) The EUT has been tested as an independent unit together with other necessary accessories or support units. The following support units or accessories were used to form a representative test configuration during the tests. Item Equipment Mfr/Brand Model/Type No. Series No. Note 1 PC / DELL MS111-1 / Note: (1) The support equipment was authorized by Declaration of Confirmation. (2) For detachable type I/O cable should be specified the length in cm in『Length』column. (3) “YES” is means “shielded” “with core”; “NO” is means “unshielded” “without core”. Report No.:WSCT-A2LA-R&E210400003A-BLE Page 9 of 79 2. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.247) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS 15.247(a)(1) Hopping Channel Separation PASS 15.247(b)(1) Peak Output Power PASS 15.247(c) Radiated Spurious Emission PASS 15.247(a)(iii) Number of Hopping Frequency PASS 15.247(a)(iii) Dwell Time PA…

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CONDUCTED EMISSION TEST RADIATED EMISSION TEST (Frequency from 30MHz to 1GHz) RADIATED EMISSION TEST (Frequency above 1GHz)