2AVTM-TT2108Heyday True Wireless Earbuds

TT Innovation Technology (HK) Co., Ltd. Long Term Confidentiality Request Letter Date: 2021-01-05 MET Laboratories, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (EUT NAME: Heyday True Wireless Earbuds / MODEL: TT2108 / FCC ID: 2AVTM-TT2108 ) 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/PCB/BOM/operational description ) required to be submitted with this application be permanently withheld from public review. The above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, Print name： Title: Signature:

1 External Photo FCC ID: 2AVTM-TT2108 View of The Product View of The Product 2 View of The Product View of The Product 3 View of The Product

008-07-0380 MC:TTMG0121 FCC ID: 2AVTM-TT2108

1 Internal Photo FCC ID: 2AVTM-TT2108 Inner View of the EUT Inner Circuit Top View 2 Inner Circuit Top View Inner Circuit Bottom View 3 Inner Circuit Top View Inner Circuit Bottom View 4 Inner Circuit Top View Inner Circuit Bottom View 5 Inner Circuit Top View Inner Circuit Bottom View 6 Battery View of the Product Antenna View of the Product Antenna

1 深圳市国质信网络通讯有限公司 版权所有 样品承认书 Parts Approval Sheet 生产厂商： 国质信网络 物料名称： 左耳BT天线 Supplier Parts Name 型号/规格：NQI-RT42-LBT-FB-V10 客户料号： Type/Spec Parts No. 品 牌： NQI 样品数量： Brand Quantity 送样日期： 2020.12.30 文件编号： Send out Date Document No. 承认日期： 版 本： V0 Approve Date Version Supplier Customer Approved By Prepared By Engineering Dept. Quality Dept. 民倚星 2 深圳市国质信网络通讯有限公司 版权所有 Contents 1.Summary.....................................................................................................3 2.General Description.................................................................................3 2.1 Components/Part revisions...................................................................................3 2.2 Definitions ..............................................................................................................3 3.Electrical Performance...........................................................................3-4 3.1 Specification ...........................................................................................................3 3.1.1 VSWR ..................................................................................................................4 3.2 Set-up.......................................................................................................................4 3.2.1 VSWR ..................................................................................................................4 3.2.2 Matching Circuit Description ..............................................................................4 3.3 VSWR&R.L.(Test in freespace) ............................................................................ 4 4. Plots ......................................................................................4-6 4.1 VSWR...........................................................................................5 4.2 Return Loss...................................................................................5 4.3 Efficiency and Gain.............................................................6 4.4Directionalgraph............................................................................6 5. Antenna Engineer drawing ...........................................................7 6.ReliabilityTestingReport .............................................................8 3 深圳市国质信网络通讯有限公司 版权所有 1. Summary This report summarizes the electrical results of the our antenna to support the project BT The test fixture is made for further testing, which is show below： 2. General Description 2.1 Antenna Components/Part revisions The antenna part number is T：A 2.2 Definitions VSWR：Voltage Standing Wave Rate TRP：total radiated power TIS：total istropic sensitivity 3. Electrical Performance 3.1 Specification Worst allowable in band values are presented. A setup according to should be used when testing these values. 4 深圳市国质信网络通讯有限公司 版权所有 3.1.1 VSWR(Test in free space) Freq. 2400 2500 VSWR ≤3.6 ≤2.4 3.2 Set-up 3.2.1 VSWR The S11 parameter is performed using Angilent E5071B Network Analyzer and NQI’s test fixture that is using customer-providing device. We use a 30cm long ferrite de-coupling sleeve to mitigate surface currents on the outside of the testing cable. 3.2.2 Matching Circuit Description ElementValue E1（0201） 5.1NH E2（0201） 0Ω E3（0201） 1PF E4（0201） 0Ω 3.3 VSWR& R.L.(Test in free space) Freq.(MHz) 2400 2500 VSWR 2.6 1.4 R.L. -6.8 -14 5 深圳市国质信网络通讯有限公司 版权所有 4. Plots 4.1 VSWR VSWR parameter in sample antenna tested in free space 4.2 Return Loss S11 parameter in sample antenna tested in free space 6 深圳市国质信网络通讯有限公司 版权所有 4.3 Efficiency and Gain BT(Efficiency&Gain) Frequency（GHz） 2.40 2.45 2.50 Efficiency 19.57% 21.35% 23.17% Gain(dBi) -3.41 -2.86 -2.48 4.4 2.4G-2D Patterns&3D radiation pattern 7 深圳市国质信网络通讯有限公司 版权所有 5.Antenna Engineer drawing： 8 深圳市国质信网络通讯有限公司 版权所有 6.Reliability Testing Report： customer 民倚星 part number FPC Work Date 2020.12.30 Test item Test requirement Test result Evaluation neutral Salt-Fog test Hydrochloric fog through neutral testing: In the time of 24 hours, no rust corrosion, color fading or solder peel off to the antenna fpc sop in Nacl 5%±1% PH value 6.5-7.2, above 85% humidity. and 35°C±2°C Seals environment. Norust corrosion, color fading or solder peel off on the antenna surface after testing pass tester：黄土勇 approval： 1 深圳市国质信网络通讯有限公司 版权所有 样品承认书 Parts Approval Sheet 生产厂商： 国质信网络 物料名称： 右耳BT天线 Supplier Parts Name 型号/规格：NQI-RT42-RBT-FB-V10 客户料号： Type/Spec Parts No. 品 牌： NQI 样品数量： Brand Quantity 送样日期： 2020.12.30 文件编号： Send out Date Document No. 承认日期： 版 本： V0 Approve Date Version Supplier Customer Approved By Prepared By Engineering Dept. Quality Dept. 民倚星 2 深圳市国质信网络通讯有限公司 版权所有 Contents 1.Summary.....................................................................................................3 2.General Description.................................................................................3 2.1 Components/Part revisions...................................................................................3 2.2 Definitions ..............................................................................................................3 3.Electrical Performance...........................................................................3-4 3.1 Specification ...........................................................................................................3 3.1.1 VSWR ..................................................................................................................4 3.2 Set-up.......................................................................................................................4 3.2.1 VSWR ..................................................................................................................4 3.2.2 Matching Circuit Description ..............................................................................4 3.3 VSWR&R.L.(Test in freespace) ............................................................................ 4 …

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RF Exposure Test Requirement: FCC 47CFR 15.247(i) Test Date: 2021-1-8 Mode of Operation: Tx mode Requirements: In 15.247(i), an equipment shall be operated in a manner that ensures that the public is not exposed to radio frequency energy levels in excess of the limits in §§ 1.1310 and 2.1093 of this chapter. Applications to the Commission for construction permits, licenses to transmit or renewals thereof, equipment authorizations or modifications in existing facilities must contain a statement confirming compliance with the limits unless the facility, operation, or transmitter is categorically excluded, as discussed below. Technical information showing the basis for this statement must be submitted to the Commission upon request. According toKDB447498 D01 General RF Exposure Guidance v06, unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Exclusion Threshold condition. Test Results: RF Exposure Evaluation The Maximum conducted output power = 2.0137mW (at frequency = 2.480 GHz) It’s Conducted source-based time-averaging output power = 2.0085 mW (at frequency = 2.480 GHz) SAR Test Exclusion Thresholds=0.6218≤ 3.0 for 1-g SAR, The test separation distances is 5 mm The power tune up tolerance is 2.04±1.0dBm Max. duty factor is 100%

Test Report Date : 2021-01-22 Page 1 of 108 No. : HMD21010010 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. Applicant : TT Innovation Technology (HK) Co., Ltd. Unit 506A, Harbour Crystal Centre,100 Granville Road, Tsim Sha Tsui, Kowloon, Hong Kong Supplier / Manufacturer : TT Innovation Technology (HK) Co., Ltd. Unit 506A, Harbour Crystal Centre,100 Granville Road, Tsim Sha Tsui, Kowloon, Hong Kong Description of Sample(s) : Submitted sample(s) said to be Product: Heyday True Wireless Earbuds Brand Name: heyday Model No.: TT2108 FCC ID: 2AVTM-TT2108 Date Samples Received : 2020-12-29 Date Tested : 2021-01-04 to 2021-01-08 Investigation Requested : Perform Electro Magnetic Interference measurement in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15 and ANSI C63.10:2013 for FCC Certification. Conclusions : The submitted product COMPLIED with the requirements of Federal Communications Commission [FCC] Rules and Regulations Part 15. The tests were performed in accordance with the standards described above and on Section 2.2 in this Test Report. Remarks : Bluetooth FHSS (GFSK / /4-DQPSK/ 8DPSK) _______________________________ Dr. LEE Kam Chuen, Authorized Signatory Test Report Date : 2021-01-22 Page 2 of 108 No. : HMD21010010 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. CONTENT: Cover Page 1 of 108 Content Page 2 of 108 1.0 General Details 1.1 Test Laboratory Page 3 of 108 1.2 Equipment Under Test [EUT] Page 3 of 108 Description of EUT operation 1.3 Date of Order Page 3 of 108 1.4 Submitted Sample(s) Page 3 of 108 1.5 Test Duration Page 3 of 108 1.6 Country of Origin Page 3 of 108 1.7 RF Module Details Page 4 of 108 1.8 Antenna Details Page 4 of 108 1.9 Channel List Page 4 of 108 2.0 Technical Details 2.1 Investigations Requested Page 5 of 108 2.2 Test Standards and Results Summary Page 6 of 108 2.3 Table for Test Modes Page 7 of 108 3.0 Test Results 3.1 Emission Page 8-102 of 108 Appendix A List of Measurement Equipment Page 103 of 108 Appendix B Ancillary Equipment Page 103 of 108 Appendix C Photograph(s) of Product Page 104-108 of 108 Test Report Date : 2021-01-22 Page 3 of 108 No. : HMD21010010 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. 1.0 General Details 1.1 Test Laboratory The Hong Kong Standards and Testing Centre Ltd. EMC Laboratory 10 Dai Wang Street, Taipo Industrial Estate, New Territories, Hong Kong Telephone: 852 2666 1888 Fax: 852 2664 4353 1.2 Equipment Under Test [EUT] Description of Sample(s) Product: Heyday True Wireless Earbuds Manufacturer: Dongguan Fulun Electronics Co., Ltd. 4-8 Building B Xinbosheng Industrial Park No.5 Xinyuan South Road Keyuan City Tangxia Dongguan China Brand Name: heyday Model Number: TT2108 Rating: 5Vd.c.(power by USB port) / 3.7Vd.c (Li-ion rechargeable battery x1) 1.2.1 Description of EUT Operation The Equipment Under Test (EUT) is a Heyday True Wireless Earbuds. The transmission signal is digital modulated with channel frequency range 2402-2480MHz. The R.F. signal was modulated by IC; the type of modulation used was frequency hopping spread spectrum Modulation. 1.3 Date of Order 2020-12-29 1.4 Submitted Sample(s): 1 Sample 1.5 Test Duration 2021-01-04 to 2021-01-08 1.6 Country of Origin China Test Report Date : 2021-01-22 Page 4 of 108 No. : HMD21010010 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. 1.7 RF Module Details Module Model Number: ATS3015 Module FCC ID: N/A Module Transmission Type: Bluetooth V5.0 EDR Modulation: FHSS (GFSK / /4-DQPSK/ 8DPSK) Data Rates: 1MBps: GFSK 2 MBps: /4-DQPSK 3 MBps: 8DPSK Frequency Range: 2400-2483.5MHz Carrier Frequencies: 2402MHz – 2480MHz Module Specification (specification provided by manufacturer) 1.8 Antenna Details Antenna Type: FPC antenna Antenna Gain: -2.48dBi 1.9 Channel List Channel Frequency (MHz) Channel Frequency (MHz) 0 2402 42 2444 1 2403 43 2445 2 2404 44 2446 3 2405 45 2447 4 2406 46 2448 5 2407 47 2449 6 2408 48 2450 7 2409 ... ... 8 2410 67 2469 9 2411 68 2470 ... ... 69 2471 33 2435 70 2472 34 2436 71 2473 35 2437 72 2474 36 2438 73 2475 37 2439 74 2476 38 2440 75 2477 39 2441 76 2478 40 2442 77 2479 41 2443 78 2480 Test Report Date : 2021-01-22 Page 5 of 108 No. : HMD21010010 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: hkstc…

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1 Test Photo FCC ID: 2AVTM-TT2108 Measurement of Radiated Emission Test Set Up Measurement of Radiated Emission Test Set Up 2 Measurement of Radiated Emission Test Set Up Measurement of Conducted Emission Test Set Up