2AVIT-TW300ANC Wireless Earbuds

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 1 of 6 External Photos for SZCR2105021103AT FCC ID: 2AVIT-TW300 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 2 of 6 1 EUT Constructional Details SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 3 of 6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 4 of 6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 5 of 6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 6 of 6

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 1 of 11 Internal Photos for SZCR2105021103AT FCC ID: 2AVIT-TW300 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 2 of 11 1 EUT Constructional Details Antenna SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 3 of 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 4 of 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 5 of 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 6 of 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 7 of 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 8 of 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 9 of 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 10 of 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 11 of 11

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110303 Page: 1 of 6 Keny Xu EMC Laboratory Manager 1 Cover page SAR Evaluation Report Application No.: SZCR2105021103AT Applicant: Earfun Technology (HK) Limited Address of Applicant: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG Manufacturer: Earfun Technology (HK) Limited Address of Manufacturer: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG Factory: Dongguan HANK Electronics., LTD Address of Factory: 101, Block 1, No.1 Guliao Er Road, Tangxia Town, Dongguan City, Guangdong Province, China Equipment Under Test (EUT): EUT Name: ANC Wireless Earbuds Model No.: TW300 Trade mark: EarFun FCC ID: 2AVIT-TW300 Standards: 47 CFR Part 1.1307 47 CFR Part 2.1093 KDB447498D01 General RF Exposure Guidance v06 Date of Receipt: 2021-05-19 Date of Test: 2021-05-27 to 2021-06-19 Date of Issue: 2021-06-25 Test Result : PASS* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110303 Page: 2 of 6 2 Version Revision Record Version Chapter Date Modifier Remark 01 2021-06-25 Original Authorized for issue by: Charlie Dai/Project Engineer Eric Fu/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110303 Page: 3 of 6 3 Contents Page 1 COVER PAGE ........................................................................................................................................ 1 2 VERSION ................................................................................................................................................ 2 3 CONTENTS ............................................................................................................................................ 3 4 GENERAL INFORMATION ..................................................................................................................... 4 4.1 GENERAL DESCRIPTION OF EUT ......................................................................................................... 4 4.2 TEST LOCATION ................................................................................................................................ 5 4.3 TEST FACILITY .................................................................................................................................. 5 4.4 DEVIATION FROM STANDARDS ............................................................................................................ 5 4.5 ABNORMALITIES FROM STANDARD CONDITIONS .................................................................................... 5 4.6 OTHER INFORMATION REQUESTED BY THE CUSTOMER .......................................................................... 5 5 SAR EVALUATION ................................................................................................................................. 6 5.1 RF EXPOSURE COMPLIANCE REQUIREMENT ........................................................................................ 6 5.1.1 Standard Requirement ................................................................................................................ 6 5.1.2 Limits .......................................................................................................................................... 6 5.1.3 EUT RF Exposure ....................................................................................................................... 6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110303 Page: 4 of 6 4 General Information 4.1 General Description of EUT E.U.T function: The EUT include the Left and Right earbuds and travel case. the function as the following: 1.The Left and Right earbuds connect to the mobile phone to play or record the audio. 2.The travel case is charged by DC 5V or WPC and charge the left and right earbuds. Battery: Left earbuds: Li-Ion Polymer Battery 3.7V 45mAh(Charge by travel case) Right earbuds: Li-Ion Polymer Battery 3.7V 45mAh(Charge by travel case) Travel case with backup battery: Li-Ion Polymer Battery 3.7V 500mAh(Charged by Type-C port) Cable(s): Type-c cable 26cm Unshielded Non-Core Operation Frequency: 2402MHz to 2480MHz Bluetooth Version: V5.2 Classic Modulation Type: GFSK, pi/4DQPSK, 8DPSK Number of Channels: 79 Channel Spacing: 1MHz Spectrum Spread Technology: Frequency Hopping Spread Spectrum(FHSS) Antenna Type: FPC Antenna Antenna Gain: Left: 0.39dBi; Right: 0.39dBi SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110303 Page: 5 of 6 4.2 Test Location All tests were performed at: SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch No. 1 Workshop, M-10, Middle section, Science & Technology Park, Shenzhen, Guangdong, China 518057 Telephone: +86 (0) 755 2601 2053 Fax: +86 (0) 755 2671 0594 No tests were sub-contracted. 4.3 Test Facility The test facility is recognized, certified, or accredited by the following organizations: • A2LA (Certificate No. 3816.01) SGS-CSTC Standards Technical Services Co., Ltd., Shenzhen EMC Laboratory is accredited by the American Association for Laboratory Accreditation(A2LA). Certificate No. 3816.01. • VCCI The 3m Fully-anechoic chamber for above 1GHz, 10m Semi-anechoic chamber for below 1GHz, Shielded Room for Mains Port Conducted Interference Measurement and Telecommunication Port Conducted Interference Measurement of SGS-CSTC Standards Technical Services Co., Ltd. have been registered in accordance with the Regulations for Voluntary Control Measures with Registration No.: G-20026, R-14188, C-12383 and T-11153 respectively. • FCC –Designation Number: CN1178 SGS-CSTC Standards Technical Services Co., Ltd., Shenzhen EMC Laboratory has been recognized as an accredited testing laboratory. Designation Number: CN1178. Test Firm Reg…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 1 of 150 Keny Xu EMC Laboratory Manager TEST REPORT Application No.: SZCR2105021103AT Applicant: Earfun Technology (HK) Limited Address of Applicant: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG Manufacturer: Earfun Technology (HK) Limited Address of Manufacturer: FLAT/RM A 9F, SILVERCORP INTERNATIONAL TOWER 707-713 NATHAN ROAD MONGKOK KL, HONG KONG Factory: Dongguan HANK Electronics., LTD Address of Factory: 101, Block 1, No.1 Guliao Er Road, Tangxia Town, Dongguan City, Guangdong Province, China Equipment Under Test (EUT): EUT Name: ANC Wireless Earbuds Model No.: TW300 Trade Mark: EarFun FCC ID: 2AVIT-TW300 Standard(s) : 47 CFR Part 15, Subpart C 15.247 Date of Receipt: 2021-05-19 Date of Test: 2021-05-27 to 2021-06-19 Date of Issue: 2021-06-25 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 2 of 150 Revision Record Version Chapter Date Modifier Remark 01 2021-06-25 Original Authorized for issue by: Charlie Dai/Project Engineer Eric Fu/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 3 of 150 2 Test Summary Radio Spectrum Technical Requirement Item Standard Method Requirement Result Antenna Requirement 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.203 & 15.247(b)(4) Pass Other requirements Frequency Hopping Spread Spectrum System Hopping Sequence N/A 47 CFR Part 15, Subpart C 15.247(a)(1),(g),(h) Pass Radio Spectrum Matter Part Item Standard Method Requirement Result Conducted Peak Output Power 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 7.8.5 47 CFR Part 15, Subpart C 15.247(b)(1) Pass 20dB Bandwidth ANSI C63.10 (2013) Section 7.8.7 47 CFR Part 15, Subpart C 15.247(a)(1) Pass Carrier Frequencies Separation ANSI C63.10 (2013) Section 7.8.2 47 CFR Part 15, Subpart C 15.247a(1) Pass Hopping Channel Number ANSI C63.10 (2013) Section 7.8.3 47 CFR Part 15, Subpart C 15.247a(1)(iii) Pass Dwell Time ANSI C63.10 (2013) Section 7.8.4 47 CFR Part 15, Subpart C 15.247a(1)(iii) Pass Conducted Band Edges Measurement ANSI C63.10 (2013) Section 7.8.6 47 CFR Part 15, Subpart C 15.247(d) Pass Conducted Spurious Emissions ANSI C63.10 (2013) Section 7.8.8 47 CFR Part 15, Subpart C 15.247(d) Pass Radiated Emissions which fall in the restricted bands ANSI C63.10 (2013) Section 6.10.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Below 1GHz ANSI C63.10 (2013) Section 6.4,6.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Above 1GHz ANSI C63.10 (2013) Section 6.6 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Emission Part Item Standard Method Requirement Result Conducted Emissions at AC Power Line (150kHz-30MHz) 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 6.2 47 CFR Part 15, Subpart C 15.207 Pass SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 4 of 150 3 Contents Page 1 COVER PAGE ..................................................................................................................................... 1 2 TEST SUMMARY ................................................................................................................................. 3 3 CONTENTS ......................................................................................................................................... 4 4 GENERAL INFORMATION .................................................................................................................. 6 4.1 DETAILS OF E.U.T. ......................................................................................................................... 6 4.2 DESCRIPTION OF SUPPORT UNITS .................................................................................................... 6 4.3 MEASUREMENT UNCERTAINTY ......................................................................................................... 6 4.4 TEST LOCATION ............................................................................................................................. 8 4.5 TEST FACILITY ............................................................................................................................... 8 4.6 DEVIATION FROM STANDARDS ......................................................................................................... 8 4.7 ABNORMALITIES FROM STANDARD CONDITIONS ................................................................................. 8 5 EQUIPMENT LIST ............................................................................................................................... 9 6 RADIO SPECTRUM TECHNICAL REQUIREMENT ............................................................................13 6.1 ANTENNA REQUIREMENT ................................................................................................................13 6.1.1 Test Requirement: ..................................................................................................................13 6.2 OTHER REQUIREMENTS FREQUENCY HOPPING SPREAD SPECTRUM SYSTEM HOPPING SEQUENCE ........14 6.2.1 Test Requirement: ..................................................................................................................14 7 RADIO SPECTRUM MATTER TEST RESULTS .................................................................................16 7.1 CONDUCTED PEAK OUTPUT POWER ................................................................................................16 7.1.1 E.U.T. Operation .....................................................................................................................16 7.1.2 Test Mode Description .........................…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 101 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 102 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 103 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 104 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 105 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 106 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 107 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 108 of 150 For Left earbuds 1. Bandwidth 1.1 Test Result Test Mode Frequency (MHz) TX Type ANT No. 20dB Bandwidth Verdict Test Result (MHz) GFSK 2402 SISO 1 1.026 PASS 2441 SISO 1 0.962 PASS 2480 SISO 1 0.962 PASS Pi/4DQPSK 2402 SISO 1 1.329 PASS 2441 SISO 1 1.286 PASS 2480 SISO 1 1.286 PASS 8DPSK 2402 SISO 1 1.314 PASS 2441 SISO 1 1.313 PASS 2480 SISO 1 1.308 PASS Test Mode Frequency (MHz) TX Type ANT No. 99% Occupied Bandwidth Test Result (MHz) GFSK 2402 SISO 1 0.884 Only for Report Use 2441 SISO 1 0.884 Only for Report Use 2480 SISO 1 0.885 Only for Report Use Pi/4DQPSK 2402 SISO 1 1.294 Only for Report Use 2441 SISO 1 1.249 Only for Report Use 2480 SISO 1 1.227 Only for Report Use 8DPSK 2402 SISO 1 1.275 Only for Report Use 2441 SISO 1 1.253 Only for Report Use 2480 SISO 1 1.237 Only for Report Use SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 109 of 150 1.2 Test Graph - 20dB Bandwidth SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 110 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 111 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 112 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 113 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 114 of 150 1.3 Test Graph - 99% Occupied Bandwidth SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 115 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 116 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 117 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 118 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 119 of 150 2. Maximum Conducted Output Power 2.1 Test Result Test Mode Frequency (MHz) Tx Type Measured Peak Output Power (dBm) Limits (dBm) Verdict Ant 1 GFSK 2402 SISO 4.66 30 PASS 2441 SISO 4.27 30 PASS 2480 SISO 3.49 30 PASS Pi/4DQPSK 2402 SISO 4.66 20.97 PASS 2441 SISO 4.26 20.97 PASS 2480 SISO 3.48 20.97 PASS 8DPSK 2402 SISO 4.70 20.97 PASS 2441 SISO 4.31 20.97 PASS 2480 SISO 3.55 20.97 PASS 2.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 120 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 121 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 122 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 123 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 124 of 150 3. Carrier frequency separation 3.1 Test Result Test Mode TX Type ANT No. Channel Separation (MHz) 20dB Bandwidth (MHz) Limits (MHz) Verdict GFSK SISO 1 1.003 1.026 ≥0.684 PASS Pi/4DQPSK SISO 1 1.000 1.286 ≥0.857 PASS 8DPSK SISO 1 1.005 1.314 ≥0.876 PASS 3.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 125 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 126 of 150 4. Number of hopping frequencies 4.1 Test Result Test Mode TX Type ANT No. Num of Hopping Frequencies Limits Verdict GFSK SISO 1 79 ≥15 PASS Pi/4DQPSK SISO 1 79 ≥15 PASS 8DPSK SISO 1 79 ≥15 PASS 4.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 127 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 128 of 150 5. Time of Occupancy (Dwell Time) 5.1 Test Result Test Mode Packet Type TX Type ANT No. Duration of Single Pulse (ms) Obeserv ation Period (s) Num of Pulse in Observation Period Dwell Time (ms) Limits (ms) Verdict GFSK DH1 SISO 1 0.377 31.6 320 120.640 ≤400 PASS DH3 SISO 1 1.633 31.6 160 261.280 ≤400 PASS DH5 SISO 1 2.882 31.6 107 308.374 ≤400 PASS Pi/4DQ PSK 2DH1 SISO 1 0.383 31.6 320 122.560 ≤400 PASS 2DH3 SISO 1 1.635 31.6 160 261.600 ≤400 PASS 2DH5 SISO 1 2.883 31.6 107 308.481 ≤400 PASS 8DPSK 3DH1 SISO 1 0.383 31.6 320 122.560 ≤400 PASS 3DH3 SISO 1 1.634 31.6 160 261.440 ≤400 PASS 3DH5 SISO 1 2.885 31.6 107 308.695 ≤400 PASS 5.2 Test Graph SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 129 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 130 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 131 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZCR210502110302 Page: 132 of 150 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Rep…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 1 of 3 Setup Photos for SZCR2105021103AT FCC ID: 2AVIT-TW300 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 2 of 3 1 Photographs Conducted Emissions at AC Power Line (150kHz-30MHz) Radiated Spurious Emissions Below 1GHz SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Page: 3 of 3 Radiated Spurious Emissions Above 1GHz Left earbuds Right earbuds