2AVIT-TW400LANC Wireless Earbuds

A TTESTATION STATEMENT Earfun Technology (HK) Limited ADD: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG TEL: +8615989596589 FAX: +8618018710764 E-mail: [email protected] D ate: 2023-07-06 F EDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 R ef: Attestation Statements Part 2.911(d)(5)(i), (ii)Filling FCC ID: 2AVIT-TW400L E arfun Technology (HK) Limited. certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. An d Earfun Technology (HK) Limited. certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. S incerely, Printed Name: Rocky Deng Title: Product Director

U.S. AGENT LETTER OF ATTESTATION Date: 2023-07-06 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID: 2AVIT-TW400L Earfun Technology (HK) Limited certifies that, as of the date of the filing of the application, EARFUN, INC (U.S. agent). is our designated U.S. agent for service of process for the above referenced FCC ID. Earfun Technology (HK) Limited accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. EARFUN, INC (U.S. agent) accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Name: EARFUN, INC Address: 8605 SANTA MONICA BLVD #79525 WEST HOLLYWOOD, CA 90069-4109 FRN: 0033640855 Tel.: +1(757)6555536 Email: [email protected] Signed by (printed name): ZILI WANG Signature: Applicant: Earfun Technology (HK) Limited Add: FLAT/RM A 9F,SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL HONG KONG FRN: 0029085636 TEL: +8615989596589 FAX: +8618018710764 Email: [email protected] Signed by (printed name): Rocky Deng Signature:

Earfun Technology (HK) Limited ADD: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG TEL: +8615989596589 FAX: +8618018710764 E-mail: [email protected] FCC Authorization D ate: 2023-07-06 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We , Earfun Technology (HK) Limited, Hereby authorizes China Certification ICT Co., Ltd (Dongguan) 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 China Certification ICT Co., Ltd (Dongguan) 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, Client’s signature Printed Name: Rocky Deng Title: Product Director QA-FR-170-B

Earfun Technology (HK) Limited ADD: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG TEL: +8615989596589 FAX: +8618018710764 E-mail: [email protected] FCC Con fidential Authorization Dat e: 2023-07-06 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Su bject: Confidentiality Request regarding application for certification of FCC ID: 2AVIT-TW400L In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, (Earfun Technology (HK) Limited) hereby requests long-term confidential treatment of information accompanying this application as outlined below: •Block Diagram •Schematics •Operation Description 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. Si ncerely, Sig nature: Pr inted Name: Rocky Deng Title: Product Director QA-FR-171-A

QA-FR-169-B Earfun Technology (HK) Limited ADD: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG TEL: +8615989596589 FAX: +8618018710764 E-mail: [email protected] label placement Date: 2023-07-06 To whom it may concern, We, Earfun Technology (HK) Limited, FCC ID: 2AVIT-TW400L, hereby submits justification for placing the ID label to the charging box. Because the surface of this device is very smooth, the processing technology is difficult and the device is too small so the ID label cannot to be printed on this device. Unit:mm Since rely, Signature: Rocky Deng Product Director The measurement of Earphone: Length (27.75mm)*Width (23.90mm)*High (17.03mm), The label width: Length (42.64mm)*Width (12.40mm), so the label will be moved to the Charging Case. Below photo will show the detail: Label

EXHIBIT B - EUT EXTERNAL PHOTOGRAPHS Port Left ear

EXHIBIT C - EUT INTERNAL PHOTOGRAPHS Uncover_Charging Case Charging Case Battery Coil Antenna Chip Uncove_Left ear Left ear Bluetooth Antenna RF Chip

China Certification ICT Co., Ltd (Dongguan) Report No.: CR230634012-00C Page 46 of 46 5. RF EXPOSURE EVALUATION 5.1 Applicable Standard According to§15.247(i) and §1.1310, 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 KDB447498 D01 General RF Exposure Guidance v06: 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 • The result is rounded to one decimal place for comparison • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below 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 according to 5) in section 4.1 is applied to determine SAR test exclusion. 5.2 Measurement Result For BLE: The max conducted power including tune-up tolerance is 3dBm (1.995 mW). [(max. power of channel, mW)/(min. test separation distance, mm)][√f(GHz)] =1.995/5*(√2.480) = 0.6< 3.0 Result: Compliant. The stand-alone SAR evaluation is not necessary. ===== END OF REPORT ====

TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (1) of (9) iTD Drawing # 20230609 Revision #: Initial Release Source Control Drawing Part Description: Bluetooth TWS headset iTD Part Number: TW400-L iTD Software version iTD Hardware version TW400-L-V5.0_ Customer Approval (Please return this copy as a certification of your approval) Approved by: Approval Date: Company Seal: 㖇൶φKWWSVZZZ[K\FRP  PROPRIETARY NOTICE These documents, and the contained information herein, are proprietary and are not to be reproduced, used or disclosed to others for manufacture or for any other purpose, except as specifically authorized, in writing, by iTD Corporation. iTD Contact Information: +XOI2OT Mb:  Email:RP]&OZJZKQIUS Add: RongChenDaChuang building room 302, Dabao Road, Xin ‘an Street 28, Bao An District, Shenzhen City Shenzhen Dingshe Technology Co., Ltd TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (2) of (9) iTD Drawing # 20230609 Revision #: Initial Release Number Effective date Change record V5.0 2023-6-9 Initial release TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (3) of (9) iTD Drawing # 20230609 Revision #: Initial Release The basic parameters˖ A. Electrical Characteristics Frequency 2400MHZ~2500MHZ VSWR < 3 Avg Efficiency >20% Impedance 50 ff 25 Ohm Polarization Linear Peak Gain 2.4G:-0.79dBi B. Material & Mechanical Characteristics Material of Radiator FPC black Cable Type  Connector Type / Dimension / C. Environmental Operation Temperature - 20 ̊C ~ + 60 ̊C Storage Temperature - 30 ̊C ~ + 70 ̊C TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (4) of (9) iTD Drawing # 20230609 Revision #: Initial Release Electrical Specification : Those specifications were specially defined for 7: model. VSWR 1 Measuring Method 1.A 50ʈcoaxial cable is connected to the antenna. Then this cable is connected to a network analyzer to measure the VSWR 2.Keeping this jig away from metal at least 20cm 2 Measurement frequency points and VSWR value TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (5) of (9) iTD Drawing # 20230609 Revision #: Initial Release Anechoic chamber /TZXUJ[IZOUT  ‹…”‘™ƒ˜‡†ƒ””‘‘ƒ†‘”‡ˆŽ‡…–‹‘…Šƒ„‡”ǡƒ„•‘”„‹‰•Š‘”–™ƒ˜‡†ƒ””‘‘ †ƒ””‘‘Ǥ‹…”‘™ƒ˜‡†ƒ””‘‘„›‡Ž‡…–”‘ƒ‰‡–‹…•Š‹‡Ž†‹‰”‘‘ǡˆ‹Ž–‡”‹‰ƒ† ‹•‘Žƒ–‹‘ǡ‰”‘—†‹‰†‡˜‹…‡ǡ–Š‡˜‡–‹Žƒ–‹‘†—…–ǡ‹†‘‘”†‹•–”‹„—–‹‘•›•–‡ǡ ‘‹–‘”‹‰•›•–‡ǡ…‡‹Ž‹‰™ƒ˜‡ƒ–‡”‹ƒŽ’ƒ”–Ǥ –‹•„ƒ•‡†‘–Š‡™ƒ˜‡ƒ„•‘”„‹‰ ƒ–‡”‹ƒŽƒ•–Š‡Ž‹‹‰‘ˆ–Š‡•Š‹‡Ž†”‘‘ǡ‹–…ƒƒ„•‘”„–Š‡‘•– ‘ˆ –Š‡ ‡Ž‡…–”‘ƒ‰‡–‹…‡‡”‰›‹–‘–Š‡•‹š™ƒŽŽ‹•ƒ„‡––‡”•‹—Žƒ–‹‘‘ˆ–Š‡ˆ”‡‡•’ƒ…‡ …‘†‹–‹‘•Ǥ  Š‡ƒ‹™‘”‹‰’”‹…‹’Ž‡‘ˆ‹…”‘™ƒ˜‡ƒ‡…Š‘‹……Šƒ„‡”‹•ƒ……‘”†‹‰–‘–Š‡ ‡Ž‡…–”‘ƒ‰‡–‹…™ƒ˜‡‹–Š‡‡†‹—ˆ”‘–Š‡Ž‘™ƒ‰‡–‹…‰—‹†‡ƒ‰‡–‹… †‹”‡…–‹‘‘ˆ’”‘’ƒ‰ƒ–‹‘”—Ž‡•ǡƒ„•‘”„‹‰ƒ–‡”‹ƒŽ•–‘‰—‹†‡–Š‡‡Ž‡…–”‘ƒ‰‡–‹… ™ƒ˜‡—•‹‰Š‹‰Š’‡”‡ƒ„‹Ž‹–›ǡ–Š”‘—‰Š”‡•‘ƒ…‡ǡƒ•—„•–ƒ–‹ƒŽƒ„•‘”’–‹‘‘ˆ ‡Ž‡…–”‘ƒ‰‡–‹…™ƒ˜‡”ƒ†‹ƒ–‹‘‡‡”‰›ǡ„›…‘—’Ž‹‰–Š‡‡Ž‡…–”‘ƒ‰‡–‹…‡‡”‰› ‹–‘Š‡ƒ–‡‡”‰›Ǥ SGOTVKXLUXSGTIK ͵ Frequency range:400MHz ~ 6GHz ceiling reflected wave loss materials: 400MHz ~ 6GHz is equal to or more than 15dB (microwave absorbing material by composite wave absorbing materials, namely tapered containing carbon sponge suction wave material paste in ferrite) TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (6) of (9) iTD Drawing # 20230609 Revision #: Initial Release Gain table of Antenna    TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (7) of (9) iTD Drawing # 20230609 Revision #: Initial Release 3GINOTK6OIZ[XK͵ TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (8) of (9) iTD Drawing # 20230609 Revision #: Initial Release Antenna Dimensions TW400-L Date of Issue: 2023-06-09 ESD Sensitive Page (9) of (9) iTD Drawing # 20230609 Revision #: Initial Release ROHS: Antenna (-7: meets RoHS requirements. Product packaging instructions: Ǥ’ƒ…‹‰•Š‘—Ž†‡‡––Š‡‘‹•–—”‡’”‘‘ˆǡ˜‹„”ƒ–‹‘ǡ’”‡••—”‡ƒ† ‹Ž†‡™’”‘‘ˆǡ‡–…Ǥ Ǥ–Š‡•ƒŽŽ‡•–’ƒ…‹‰—‹–Ž‘‰‘—•–Šƒ˜‡–Š‡ƒ—ˆƒ…–—”‡” –”ƒ†‡ƒ”•ǡ’”‘†—…–‘†‡Žǡƒ‡ǡ…‘†‡ƒ†“—ƒ–‹–›Ǥ Ǥ‹–Š‡ƒ––ƒ…Š‡†’ƒ…‹‰Ž‹•–ǡ…‡”–‹ˆ‹…ƒ–‡‘ˆƒ’’”‘˜ƒŽǡƒ†–Š‡ˆƒ…–‘”› ‹•’‡…–‹‘”‡’‘”–Ǥ ***************************END****************************

TEST REPORT Applicant: Earfun Technology (HK) Limited Address: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG FCC ID: 2AVIT-TW400L Product Name: ANC Wireless Earbuds Standard(s): 47 CFR Part 15, Subpart C(15.247) ANSI C63.10-2013 KDB 558074 D01 15.247 Meas Guidance v05r02 The above equipment has been tested and found compliant with the requirement of the relative standards by China Certification ICT Co., Ltd (Dongguan) Report Number: CR230634012-00C Date Of Issue: 2023/7/6 Reviewed By: Calvin Chen Title: RF Engineer Approved By: Sun Zhong Title: Manager Test Laboratory: China Certification ICT Co., Ltd (Dongguan) No. 113, Pingkang Road, Dalang Town, Dongguan, Guangdong, China Tel: +86-769-82016888 China Certification ICT Co., Ltd (Dongguan) Report No.: CR230634012-00C Page 2 of 46 Test Facility The Test site used by China Certification ICT Co., Ltd (Dongguan) to collect test data is located on the No. 113, Pingkang Road, Dalang Town, Dongguan, Guangdong, China. The lab has been recognized as the FCC accredited lab under the KDB 974614 D01 and is listed in the FCC Public Access Link (PAL) database, FCC Registration No. : 442868, the FCC Designation No. : CN1314. The lab has been recognized by Innovation, Science and Economic Development Canada to test to Canadian radio equipment requirements, the CAB identifier: CN0123. Declarations China Certification ICT Co., Ltd (Dongguan) 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 a triangle symbol “▲”. Customer model name, addresses, names, trademarks etc. are not considered data. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report cannot be reproduced except in full, without prior written approval of the Company. 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. This report may contain data that are not covered by the accreditation scope and shall be marked with an asterisk “★”. China Certification ICT Co., Ltd (Dongguan) Report No.: CR230634012-00C Page 3 of 46 CONTENTS T EST FACILITY .......................................................................................................................................... 2 DECLARATIONS .......................................................................................................................................... 2 DOCUMENT REVISION HISTORY .......................................................................................... 5 1. GENERAL INFORMATION .................................................................................................... 6 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ....................................................... 6 1.2 DESCRIPTION OF TEST CONFIGURATION ........................................................................................... 7 1.2.1 EUT Operation Condition: ............................................................................................................................. 7 1.2.2 Support Equipment List and Details .............................................................................................................. 7 1.2.3 Support Cable List and Details ...................................................................................................................... 7 1.2.4 Block Diagram of Test Setup ......................................................................................................................... 7 1.3 MEASUREMENT UNCERTAINTY .......................................................................................................... 8 2. SUMMARY OF TEST RESULTS ............................................................................................ 9 3. REQUIREMENTS AND TEST PROCEDURES .................................................................. 10 3.1 AC LINE CONDUCTED EMISSIONS .................................................................................................... 10 3.1.1 Applicable Standard ..................................................................................................................................... 10 3.1.2 EUT Setup.................................................................................................................................................... 11 3.1.3 EMI Test Receiver Setup ............................................................................................................................. 11 3.1.4 Test Procedure ............................................................................................................................................. 12 3.1.5 Corrected Amplitude & Margin Calculation ................................................................................................ 12 3.2 RADIATION SPURIOUS EMISSIONS .................................................................................................... 13 3.2.1 Applicable Standard ..................................................................................................................................... 13 3.2.2 EUT Setup.................................................................................................................................................... 13 3.2.3 EMI Test Receiver & Spectrum Analyzer Setup ......................................................................................... 14 3.2.4 Test Procedure ............................................................................................................................................. 14 3.2.5 Corrected Amplitude & Margin Calculation ................................................................................................ 14 3.3 6 DB EMISSION BANDWIDTH: ............................................................…

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EXHIBIT D - TEST SETUP PHOTOGRAPHS Radiated Emission Below 1GHz View Radiated Emission Above 1GHz View