2ADYYB2Wireless Earphone

FCC ID: 2ADYYB2 1* B2 Wireless Earphone 1* Charging cable 1* User Manual 2* Large ear tip 2* Medium ear tip (fitted on the earphones) 2* Small ear tip 1. MFB 2. V+ 3. V- 4. Indicator light 5. Charging port 6. Microphone Product Name Charging Cable Earphone Battery Capacity Charging Voltage/Current Low power off voltage Music Playing Time (50%) Music Playing Time (100%) Standby Time Bluetooth distance Bluetooth Name Bluetooth Chip Bluetooth version Bluetooth frequency Bluetooth code Bluetooth protocols Operating Temperature Storage Temperature Earphones charging time Waterproof B2 TypeC 340mAh 5V/250mA 3.2V 50H 44H 300H About (no light flashing) ≥ 10m TECNO Bravo 2 ATS3019E BT5.3 ±20KHz SBC;AAC HFP V1.8;A2DP V1.3.1;AVRCP V1.7 0-45 -20~70 About 2H IPX5 B2 Wireless Earphone Charging Cable User Manual Ear Tip Voice dialing: Tap the multifunction button 3 times in the connected status (if supported by the connected Bluetooth device). Answer a callshort press MFB End a callDuring a call, short press MFB Reject a callDouble-tap MFB Next trackPlaying status, long press V+ about 2 seconds Volume upmusic/call status press V+ Play/pause: Standby/playing status short press MFB Previous trackPlaying status, long press V- about 2 seconds Volume downmusic/call status press V- TECNO Bravo 2 Re-connect with previously paired devices 1. After powered on, the earphone will attempt to automatically reconnect with the previously paired device. If the attempt fails after 15s, the earphone will try pairing with a new device. The earphone will power off after 10 minutes due to timeout if the attempted pairing is not successful. 2. Connection with a device out of connecting range will resume when the device is within the connecting range again. The earphone will power off after 10 minutes due to timeout if the attempted pairing is not successful. Pop-up window When this earphone is in the pairing mode, a pop-up window for paring will appear on a phone when the phone receives BLE broadcast signals from this earphone. Manual connection When two hosts (a phone or a computer) are connecting with this Bluetooth earphone, you can switch between the two hosts manually. Pairing The earphone will start pairing after power-on if it has no pairing history, or start pairing if its attempt to re-connect with a previously paired device fails. The earphone will power off after 10 minutes of pairing due to timeout. White light off after 1s lightup White light off after 1s lightup Quick blink (on, off, on) with an 1s interval White light blinks every 2s; white light always on after full charging Charging under regular mode Power on Power off Bluetooth pairing LED indicatorLight effect Charging Cable FCC Caution: Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Frequency Range(RF) BT/BLE: 2402-2480MHz (TX/RX); RF output power only for CE: BT: 4.88dBm BLE: 4.92dBm CAUTION 1.Risk of explosion if battery is replaced by an incorrect type, dispose of used batteries according to the instructions. – disposal of a battery into fire or a hot oven, or mechanically crushing or cutting of a battery, that can result in an explosion; – leaving a battery in an extremely high temperature surrounding environment that can result in an explosion or the leakage of flammable liquid or gas; –a battery subjected to extremely low air pressure that may result in an explosion or the leakage of flammable liquid or gas. 2.EUT Temperature: 0+47(Standalone). EU Declaration of Conformity In accordance with EU Directives and Regulations Company name: TECNO MOBILE LIMITED Address: FLAT N 16/F BLOCK B UNIVERSAL INDUSTRIAL CENTRE 19-25 SHAN MEI STREET FOTAN NT HONGKONG as the manufacturer hereby declares under our sole responsibility that the, Product(s): Wireless Earphone Model name: B2 is in conformity with the essential requirements of the RE Directive 2014/53/EU: Radio ETSI EN 300 328 V2.2.2 (2019-07) Article 3.2 EMC ETSI EN 301 489-1 V2.2.3 (2019-11) Article 3.1(b) Draft ETSI EN 301 489-17 V3.2.5 (2022-08); Safety EN IEC 62368-1:2020+A11:2020 Article 3.1(a) Health EN 50663:2017, EN 62479:2010 Article 3.1(a) An EU Type Examination Certificate for this Product was issued in accordance with Annex III (Module B) of the 2014/53/EU Radio Equipment Directive by Bay Area Compliance Laboratories Corp. (2014/53/EU Radio Equipment Directive Notified Body Identification Number 1313) Signed on behalf of TECNO MOBILE LIMITED (Signature of authorized person) Nengyong.Wu Signature: Manager Date: 2022-12-2 Wireless Earphone 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. 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. IMPORTANT NOTE: 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 equip…

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TECNO MOBILE LIMITED Address: FLAT N 16/F BLOCK B UNIVERSAL INDUSTRIAL CENTRE 19-25 SHAN MEI STREET FOTAN NT HONGKONG Tel.: 86-755-61803856 E-mail: [email protected] QA-FR-170-B FCC Authorization Date: 2022-12-2 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We, TECNO MOBILE LIMITED hereby authorizes Shenzhen Accurate Technology Co., Ltd. to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Shenzhen Accurate Technology Co., Ltd. on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature Yiting Luo Manager

TECNO MOBILE LIMITED Address: FLAT N 16/F BLOCK B UNIVERSAL INDUSTRIAL CENTRE 19-25 SHAN MEI STREET FOTAN NT HONGKONG Tel.: 86-755-61803856 E-mail: [email protected] FCC Confidential Authorization Date: 2022-12-2 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2ADYYB2 In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, TECNO MOBILE LIMITED hereby requests long-term confidential treatment of information accompanying this application as outlined below: • Block Diagram • Schematics • Operation Description As well as short-term confidential treatment of information accompanying this application for a period of 180 days after grant is issued as outlined below: • Internal Photos • User’s Manual • External Photos • Test Set-up Photos The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Signature Yiting Luo Manager

Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF External Photos Page 1 of 6 External Photos Antenna Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF External Photos Page 2 of 6 Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF External Photos Page 3 of 6 Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF External Photos Page 4 of 6 Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF External Photos Page 5 of 6 Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF External Photos Page 6 of 6

Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF LABEL AND LOCATION Page 1 of 1 FCC ID Label FCC ID Label Location Information 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)

Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF Internal Photos Page 1 of 4 Internal photos Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF Internal Photos Page 2 of 4 Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF Internal Photos Page 3 of 4 Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF Internal Photos Page 4 of 4

Shenzhen Accurate Technology Co., Ltd. Report No.: RA221116-54466E-RF-00A Version 11: 2021-11-09 Page 10 of 59 FCC-BT FCC§15.247 (i), §1.1307 (b) (3) &§2.1093 – RF EXPOSURE Applicable Standard According to FCC §2.1093 and §1.1307(b) (3), systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. According to KDB 447498 D04 Interim General RF Exposure Guidance SAR-Based Exemption: SAR-based thresholds are derived based on frequency, power, and separation distance of the RF source. The formula defines the thresholds in general for either available maximum timeaveraged power or maximum time-averaged ERP, whichever is greater. Per § 1.1307(b)(3)(i)(B), for single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold P th (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). P th is given by: Shenzhen Accurate Technology Co., Ltd. Report No.: RA221116-54466E-RF-00A Version 11: 2021-11-09 Page 11 of 59 FCC-BT For worst case: Exemption limit: For f=2.48GHz, d=0.5cm, the P th =2.72mW The higher of the available maximum time-averaged power or effective radiated power (ERP): The antenna gain is -0.72dBi (-2.87dBd), 0dBd=2.15dBi The maximum tune-up conducted power is 2.5dBm (1.78mW), which less than 2.72 mW@2480MHz exemption limit So the stand-alone SAR evaluation can be exempted.

★ Note: This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “ ”. Shenzhen Accurate Technology Co., Ltd. is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect test results are marked with an asterisk ’*’. Customer model name, addresses, names, trademarks etc. are not considered data. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. Shenzhen Accurate Technology Co., Ltd. 1/F., Building A, Changyuan New Material Port, Science & Industry Park, Nanshan District, Shenzhen, Guangdong, P.R. China Tel: +86 755-26503290 Fax: +86 755-26503396 Web: www.atc-lab.com Version 11: 2021-11-09 Page 1 of 59 FCC-BT TEST REPORT Applicant Name : TECNO MOBILE LIMITED Address : FLAT N 16/F BLOCK B UNIVERSAL INDUSTRIAL CENTRE 19-25 SHAN MEI STREET FOTAN NT HONGKONG Report Number : RA221116-54466E-RF-00A FCC ID: 2ADYYB2 Test Standard (s) FCC PART 15.247 Sample Description Product Type: Wireless Earphone Model No.: B2 Multiple Model(s) No.: N/A Trade Mark: TECNO Date Received: 2022/11/16 Report Date: 2022/12/06 Test Result: Pass* * In the configuration tested, the EUT complied with the standards above. Prepared and Checked By: Approved By: Andy Yu Candy Li EMC Engineer EMC Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: RA221116-54466E-RF-00A Version 11: 2021-11-09 Page 2 of 59 FCC-BT TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 OBJECTIVE ................................................................................................................................................................... 4 TEST METHODOLOGY .................................................................................................................................................. 4 MEASUREMENT UNCERTAINTY .................................................................................................................................... 5 TEST FACILITY ............................................................................................................................................................. 5 SYSTEM TEST CONFIGURATION .......................................................................................................................... 6 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 6 EUT EXERCISE SOFTWARE .......................................................................................................................................... 6 SPECIAL ACCESSORIES ................................................................................................................................................. 6 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 6 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 6 EXTERNAL I/O CABLE .................................................................................................................................................. 6 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 7 SUMMARY OF TEST RESULTS ............................................................................................................................... 8 TEST EQUIPMENT LIST ........................................................................................................................................... 9 FCC§15.247 (I), §1.1307 (B) (3) &§2.1093 – RF EXPOSURE ..................................................................................... 10 APPLICABLE STANDARD ............................................................................................................................................ 10 FCC §15.203 – ANTENNA REQUIREMENT .......................................................................................................... 12 APPLICABLE STANDARD ............................................................................................................................................ 12 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 12 FCC §15.205, §15.209 & §15.247(D) – RADIATED EMISSIONS .......................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 EUT SETUP ................................................................................................................................................................ 13 EMI TEST RECEIVER & SPECTRUM ANALYZER SETUP .............................................................................................. 14 TEST PROCEDURE ...................................................................................................................................................... 14 FACTOR & MARGIN CALCULATION .........................................................................................................................…

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天线描述与增益 A nt enna description and gain 天线型号(Type of antenna)：右喇叭线做天线（Right horn line for the antenna） 天线尺寸：Size of antenna： Antenna Description and Gain Right horn line for the antenna Model Unit: mm 天线效率 Efficiency 频点MHz增益（gain）(dBi)效率(Efficiency)(dB )效率(Efficiency)% 2400-0.72-6.0724.71 2410-0.76-6.0225.02 2420-0.92-6.0125.05 2430-1.23-6.1824.09 2440-1.59-6.3822.99 2450-1.73-6.3723.09 2460-2.01-6.5522.13 2470-1.93-6.3523.17 2480-1.97-6.2323.80 -1.43-6.2423.78 Return loos 3D辐射图 （3D radiation chart） 2D辐射图 Theta 90° （2D radiation chart） 3D辐射图 （3D radiation chart） 2D辐射图 Phi 90° （2D radiation chart）

Shenzhen Accurate Technology Co., Ltd. Project No.: RA221116-54466E-RF Test Photos Page 1 of 1 Photo of Radiated Emission Measurement (Below 1G) Photo of Radiated Emission Measurement (Above 1G)