2AC8UA2427Open-Ear earbuds

FRN: 0033461849

Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156903 Page: 1 of 12 This document is issued by the Company subject to its General Conditions of Service printed overleaf, available on request or accessible at http://www.sgs.com/en/Terms-and-Conditions.aspx and, for electronic format documents, subject to Terms and Conditions for Electronic Documents at http://www.sgs.com/en/Terms-and-Conditions/Terms-e-Document.aspx. Attention is drawn to the limitation of liability, indemnification and jurisdiction issues defined therein. Any holder of this document is advised that information contained hereon reflects the Company’s findings at the time of its intervention only and within the limits of Client’s instructions, if any. The Company’s sole responsibility is to its Client and this document does not exonerate parties to a transaction from exercising all their rights and obligations under the transaction documents. This document cannot be reproduced except in full, without prior written approval of the Company. Any unauthorized alteration, forgery or falsification of the content or appearance of this document is unlawful and offenders may be prosecuted to the fullest extent of the law. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested and such sample(s) are retained for 30 days only. Member of the SGS Group (SGS SA) 1 Cover Page RF Exposure Evaluation Report Application No.: KSCR2408001569AT FCC ID: 2AC8UA2427 Applicant: Anhui Huami Information Technology Co., Ltd. Address of Applicant: 7/F, Building B2, Huami Global Innovation Center, No. 900, Wangjiang West Road, High-tech Zone, Hefei City, China (Anhui) Pilot Free Trade Zone (230088) Manufacturer: Anhui Huami Information Technology Co., Ltd. Address of Manufacturer: 7/F, Building B2, Huami Global Innovation Center, No. 900, Wangjiang West Road, High-tech Zone, Hefei City, China (Anhui) Pilot Free Trade Zone (230088) Equipment Under Test (EUT): EUT Name: Open-Ear earbuds Model No.: A2427 Trade Mark: Amazfit Standard(s) : FCC Rules 47 CFR §2.1093 KDB 447498 D04 interim General RF Exposure Guidance v01 Date of Receipt: 2024-08-19 Date of Test: 2024-09-05 to 2024-09-11 Date of Issue: 2024-09-13 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156903 Page: 2 of 12 Revision Record Version Description Date Remark 00 Original 2024-09-13 / Authorized for issue by: Tested By Damon_Zhou/Project Engineer Approved By Terry Hou /Reviewer Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156903 Page: 3 of 12 2 Contents Page 1 Cover Page ........................................................................................................................................ 1 2 Contents ............................................................................................................................................ 3 3 General Information .......................................................................................................................... 4 3.1 General Description of E.U.T. .................................................................................................... 4 3.2 Details of E.U.T. ......................................................................................................................... 4 3.3 Test Location .............................................................................................................................. 5 3.4 Test Facility ................................................................................................................................ 5 4 FCC Radiofrequency radiation exposure limits ............................................................................ 6 4.1 Blanket 1 mW Blanket Exemption .............................................................................................. 6 4.2 MPE-based Exemption .............................................................................................................. 7 4.3 SAR-based Exemption ............................................................................................................... 8 5 Measurement and Calculation ....................................................................................................... 10 5.1 Maximum transmit power ......................................................................................................... 10 5.2 RF Exposure Calculation ......................................................................................................... 11 Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156903 Page: 4 of 12 3 General Information 3.1 General Description of E.U.T. Power supply: DC 3.7V,50mAh by Rechargeable Li-ion Battery Product Type: Portable device Mobile device Fixed device 3.2 Details of E.U.T. BT Operation Frequency: 2402MHz to 2480MHz Modulation Type: GFSK, Pi/4DQPSK, 8DPSK Number of Channels: 79 Channel Spacing: 1MHz Antenna Type: Monopole Antenna Antenna Gain: Left Ear: -1dBi (Provided by the manufacturer) Right Ear: 0.8dBi (Provided by the manufacturer) BLE Operation Frequency: 2402MHz to 2480MHz Modulation Type: GFSK Data rate: 1Mbps,2Mbps Number of Channels: 40 Channel Spacing: 2MHz Antenna Type: Monopole Antenna Antenna Gain: Left Ear: -1dBi (Provided by the manufacturer) Right Ear: 0.8dBi (Provided by the manufacturer) Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156903 Page: 5 of 12 3.3 Test Location All tests were performed at: Compliance Certification Services (Kunshan) Inc. No.10 Weiye Rd, Innovation park, Eco&Tec, Development Zone, Kunshan City, Jiangsu, China. Tel: +86 512 5735 5888 Fax…

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1 Antenna Specification Customers： Best Link Chip Project name： EPA713 Material category： L- BT antenna Antenna type： monopole antenna Version： V2.0 Date： 2024.09.12 Manufacturer: Shenzhen Cicent Communication Technology Co., Ltd Address: A505/506 Donglian Building, Chuangye 2nd Road, Dalang Community, Xin'an Street, Bao'an District, Shenzhen City, Guangdong Province 2 Catalogue I：The report of passive data .................................................................................................................................................... 3 II：3D Active test report of antenna ...................................................................................................................................... 8 III：Structure file ..................................................................................................................................................................... 9 Change record Compile / change date Reason for change Changed content Versio n 2024.07.25 First edition First edition V1.0 2024.09.12 Antenna performance optimization Antenna performance optimization V2.0 3 I：The report of passive data Angilent E5071C Left ear BT antenna S11 parameter (free space) 4 Left ear BT antenna S11 parameters (head model) Efficiency and gain of left ear BT antenna: Freq（MHz）GainEff_dBEff（%）Freq（MHz）GainEff_dBEff（%） 2400-1.0-5.528.12400-5.0-11.66.9 2410-1.2-5.528.32410-5.2-11.86.7 2420-1.2-5.528.52420-5.2-11.86.6 2430-1.6-5.627.42430-5.5-11.76.7 2440-1.4-5.528.02440-5.8-12.06.3 2450-1.6-5.528.12450-5.9-12.06.3 2460-1.9-5.727.02460-6.1-12.26.1 2470-1.5-5.627.82470-5.9-12.06.3 2480-1.6-5.826.32480-5.7-11.96.5 2490-1.4-5.826.32490-6.0-12.26.0 2500-1.6-6.025.02500-6.2-12.55.7 average value -1.5-5.627.3 average value -5.7-12.06.4 L Free spaceHead 5 3D directional diagram of left ear antenna (free space): 3D directional diagram of left ear antenna (head model): 6 2D directional pattern of left ear antenna (free space): Theta=90.00deg Phi=0.00deg Phi=90.00deg 7 2D directional pattern of left ear antenna (head model): Theta=90.00deg Phi=0.00deg Phi=90.00deg 8 II：3D Active test report of antenna OTA Standard Chamber 9 III：Structure file

1 Antenna Specification Customers： Best Link Chip Project name： EPA713 Material category： R- BT antenna Antenna type： monopole antenna Version： V2.0 Date： 2024.09.12 Manufacturer: Shenzhen Cicent Communication Technology Co., Ltd Address: A505/506 Donglian Building, Chuangye 2nd Road, Dalang Community, Xin'an Street, Bao'an District, Shenzhen City, Guangdong Province 2 Catalogue Change record Compile / change date Reason for change Changed content Version 2024.07.25 First edition First edition V1.0 2024.09.12 Antenna performance optimization Antenna performance optimization V2.0 I：The report of passive data .................................................................................................................................................... 3 II：3D Active test report of antenna ...................................................................................................................................... 8 III：Structure file ..................................................................................................................................................................... 9 3 I：The report of passive data Angilent E5071C Right ear BT antenna S11 parameter (free space) 4 Right ear BT antenna S11 parameters (head model) Right ear BT antenna efficiency and gain: Freq（MHz）GainEff_dBEff（%）Freq（MHz）GainEff_dBEff（%） 24000.7-5.429.02400-6.6-12.16.2 24100.5-5.429.12410-6.6-12.26.1 24200.8-5.429.12420-6.5-12.16.2 24300.5-5.031.72430-6.9-12.35.9 24400.2-5.230.32440-7.2-12.65.6 24500.2-5.130.82450-6.9-12.55.7 2460-0.1-5.230.02460-6.9-12.55.6 24700.1-5.031.92470-6.5-12.26.0 24800.1-5.031.52480-6.3-12.06.3 2490-0.1-5.329.62490-6.3-12.26.0 2500-0.2-5.428.72500-6.3-12.35.9 average value 0.2-5.230.2 average value -6.6-12.35.9 R Free spaceHead 5 3D directional diagram of right ear antenna (free space): 3D directional diagram of right ear antenna (head model): 6 2D directional pattern of right ear antenna (free space): Theta=90.00deg Phi=0.00deg Phi=90.00deg 7 2D directional diagram of right ear antenna (head model): Theta=90.00deg Phi=0.00deg Phi=90.00deg 8 II：3D Active test report of antenna OTA Standard Chamber 9 III：Structure file

Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156901 Page: 1 of 200 This document is issued by the Company subject to its General Conditions of Service printed overleaf, available on request or accessible at http://www.sgs.com/en/Terms-and-Conditions.aspx and, for electronic format documents, subject to Terms and Conditions for Electronic Documents at http://www.sgs.com/en/Terms-and-Conditions/Terms-e-Document.aspx. Attention is drawn to the limitation of liability, indemnification and jurisdiction issues defined therein. Any holder of this document is advised that information contained hereon reflects the Company’s findings at the time of its intervention only and within the limits of Client’s instructions, if any. The Company’s sole responsibility is to its Client and this document does not exonerate parties to a transaction from exercising all their rights and obligations under the transaction documents. This document cannot be reproduced except in full, without prior written approval of the Company. Any unauthorized alteration, forgery or falsification of the content or appearance of this document is unlawful and offenders may be prosecuted to the fullest extent of the law. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested and such sample(s) are retained for 30 days only. Member of the SGS Group (SGS SA) TEST REPORT Application No.: KSCR2408001569AT FCC ID: 2AC8UA2427 Applicant: Anhui Huami Information Technology Co., Ltd. Address of Applicant: 7/F, Building B2, Huami Global Innovation Center, No. 900, Wangjiang West Road, High-tech Zone, Hefei City, China (Anhui) Pilot Free Trade Zone(230088) Manufacturer: Anhui Huami Information Technology Co., Ltd. Address of Manufacturer: 7/F, Building B2, Huami Global Innovation Center, No. 900, Wangjiang West Road, High-tech Zone, Hefei City, China (Anhui) Pilot Free Trade Zone(230088) Equipment Under Test (EUT): EUT Name: Open-Ear earbuds Model No.: A2427 Trade Mark: Amazfit Standard(s) : 47 CFR Part 15, Subpart C 15.247 Date of Receipt: 2024-08-19 Date of Test: 2024-09-05 to 2024-09-11 Date of Issue: 2024-09-13 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156901 Page: 2 of 200 Revision Record Version Description Date Remark 00 Original 2024-09-13 / Authorized for issue by: Tested By Damon_Zhou/Project Engineer Approved By Terry Hou /Reviewer Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156901 Page: 3 of 200 2 Test Summary Radio Spectrum Technical Requirement Item Standard Method Requirement Result Other requirements Frequency Hopping Spread Spectrum System Hopping Sequence 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.247(a)(1),(g),(h) Pass Antenna Requirement N/A 47 CFR Part 15, Subpart C 15.203 & 15.247(b)(4) Pass Radio Spectrum Matter Part Item Standard Method Requirement Result Radiated Spurious Emissions Above 1GHz 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 6.6 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 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 Conducted Spurious Emissions ANSI C63.10 (2013) Section 7.8.8 47 CFR Part 15, Subpart C 15.247(d) Pass Conducted Band Edges Measurement ANSI C63.10 (2013) Section 7.8.6 47 CFR Part 15, Subpart C 15.247(d) Pass Dwell Time ANSI C63.10 (2013) Section 7.8.4 47 CFR Part 15, Subpart C 15.247a(1)(iii) Pass Hopping Channel Number ANSI C63.10 (2013) Section 7.8.3 47 CFR Part 15, Subpart C 15.247a(1)(iii) Pass Carrier Frequencies Separation ANSI C63.10 (2013) Section 7.8.2 47 CFR Part 15, Subpart C 15.247a(1) Pass 20dB Bandwidth ANSI C63.10 (2013) Section 7.8.7 47 CFR Part 15, Subpart C 15.247(a)(1) Pass Conducted Peak Output Power ANSI C63.10 (2013) Section 7.8.5 47 CFR Part 15, Subpart C 15.247(b)(1) Pass Compliance Certification Services (Kunshan) Inc. CCSEM-TRF-001 Rev. 02 Sep 01, 2023 Report No.: KSCR240800156901 Page: 4 of 200 3 Contents Page 1 COVER PAGE ............................................................................................................................................ 1 2 Test Summary .................................................................................................................................................. 3 3 Contents ........................................................................................................................................................... 4 4 General Information ........................................................................................................................................ 5 4.1 Details of E.U.T. ........................................................................................................................................ 5 4.2 Power level setting using in test: .............................................................................................................. 5 4.3 Description of Support Units ..................................................................................................................... 5 4.4 Measurement Uncertainty ......................................................................................................................... 6 4.5 Test Location ............................................................................................................................................ 7 4.6 Test Facility ............................................................................................................................................... 7 4.7 Deviation from St…

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