2AQK8-D60Bluetooth headset

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. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 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 equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter. Radiation Exposure Statement The device has been evaluated to meet general RF exposure requirement. in portable exposure condition without restriction.

Difference description FCC ID: 2AQK8-D60 Model: D60,D56C The Bluetooth headset manufactured by Chandasung Tech (Shenzhen) Co., Ltd needs to apply for FCC certification. The applied models are as list above. They are the same except for the model name and charge base., even the principle of the circuit, the electrical structure and all key components of earphone part related to safety and electromagnetic compatibility are the same. The difference does not affect electromagnetic compatibility and safety for earphone part. Company: Signature Lisa Peng Attestation Engineer Chandasung Tech (Shenzhen) Co., Ltd

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date: 3/20/2020 TO WHOM IT MAY CONCERN Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: FCC ID Model name 2AQK8-D60 Bluetooth headset For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Signature Lisa Peng Attestation Engineer Chandasung Tech (Shenzhen) Co., Ltd

Chandasung Tech (Shenzhen) Co., Ltd Rm 802, Building B, Zhonghengsheng High-tech Zone, No.3 Xinyu Road Xinqiao Street, Bao’an District, Shenzhen, China. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 3/20/2020 To whom it may concern: We, the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2AQK8-D60 including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Signature Lisa Peng Attestation Engineer Chandasung Tech (Shenzhen) Co., Ltd

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 6 EXTERIOR PHOTOGRAPHS OF EUT Fig.1 Fig.2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 6 Fig.3 Fig.4 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 3 of 6 Fig.5 Fig.6 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 4 of 6 Fig.7 Fig.8 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 5 of 6 Fig.9 Fig.10 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 6 of 6 Photos shows different D60 D56C

Label & Label Location Size: 5mm(L)*3mm(W) FCC ID: 2AQK8-D60

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 3 INTERIOR PHOTOGRAPHS OF EUT Fig.1 Fig.2 Bluetooth Antenna Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 3 Fig.3 Fig.4 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 3 of 3 Fig.5 Fig.6

Shenzhen Tongzhou Testing Co.,Ltd `` FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 2 RADIO FREQUENCY EXPOSURE Limit According to section 4.3.1 of KDB 447498 D01 General RF Exposure Guidance v06, SAR evaluation is required if the separation distance between the user and/or bystander and the antenna and/or radiating element of the device is less than or equal to 20 cm, except when the device operates at or below the applicable output power level (adjusted for tune-up tolerance) for the specified separation distance defined in Appendix A. Appendix A SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm MHz 5 10 15 20 25 mm 150 39 77 116 155 194 SAR Test Exclusion Threshold (mW) 300 27 55 82 110 137 450 22 45 67 89 112 835 16 33 49 66 82 900 16 32 47 63 79 1500 12 24 37 49 61 1900 11 22 33 44 54 2450 10 19 29 38 48 3600 8 16 24 32 40 5200 7 13 20 26 33 5400 6 13 19 26 32 5800 6 12 19 25 31 MHz 30 35 40 45 50 mm 150 232 271 310 349 387 SAR Test Exclusion Threshold (mW) 300 164 192 219 246 274 450 134 157 179 201 224 835 98 115 131 148 164 900 95 111 126 142 158 1500 73 86 98 110 122 1900 65 76 87 98 109 2450 57 67 77 86 96 3600 47 55 63 71 79 5200 39 46 53 59 66 5400 39 45 52 58 65 5800 37 44 50 56 62 Note: Manufacturer declared that the maximum antenna gain is 2.5dBi (Max.). Shenzhen Tongzhou Testing Co.,Ltd `` FCC ID: 2AQK8-D60 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 2 Conducted Power Results Test Mode Channel Frequency (MHz) Measured Peak Output Power (dBm) GFSK 00 2402 4.759 39 2441 4.923 78 2480 5.178 π/4-DQPSK 00 2402 7.114 39 2441 7.258 78 2480 7.899 8-DPSK 00 2402 8.212 39 2441 8.094 78 2480 7.962 Manufacturing tolerance GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 4.5 4.5 4.5 Tolerance ±(dB) 1.0 1.0 1.0 π/4-DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 7.0 7.0 7.5 Tolerance ±(dB) 1.0 1.0 1.0 8-DPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 7.5 7.5 7.5 Tolerance ±(dB) 1.0 1.0 1.0 Results Test Mode Channel Frequency (MHz) Max. Tune Up Power (dBm, Peak) Max. Eirp including Tune Up (dBm, Peak) Max. Eirp including Tune Up (mW, Peak) Exemption Limit (mW) GFSK 2402 5.5 5.5 3.5 10 2440 5.5 5.5 3.5 10 2480 5.5 6.0 3.5 10 π/4-DQPSK 2402 7.5 7.5 5.6 10 2440 7.5 7.5 5.6 10 2480 8.0 8.0 6.3 10 8-DPSK 2402 8.5 8.5 7.1 10 2440 8.5 8.5 7.1 10 2480 8.5 8.5 7.1 10 The antenna gain of the EUT for BT is 1.9dBi (Max). the Maximum Eirp is used for Routine Evaluation Exemption according to section 4.3.1 of KDB 447498 D01. So, the SAR evaluation is not required.

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 1 of 45 Appendix A RF Test Data for BT(BDR/EDR) (Conducted Measurement) Product Name: Bluetooth headset Trade Mark: CDX Test Model: D60,D56C FCC ID: 2ATOB-D60 Environmental Conditions Temperature: 22.7 C Relative Humidity: 50% ATM Pressure: 100.0 kPa Test Engineer: Anna Hu Supervised by: Hugo Chen A.1 20 dB Bandwidth Mode Channel. 20dB Bandwidth [MHz] Limit(MHz) Verdict GFSK LCH 0.936 Not Specified PASS GFSK MCH 0.943 Not Specified PASS GFSK HCH 0.940 Not Specified PASS π/4DQPSK LCH 1.329 Not Specified PASS π/4DQPSK MCH 1.333 Not Specified PASS π/4DQPSK HCH 1.324 Not Specified PASS 8DPSK LCH 1.324 Not Specified PASS 8DPSK MCH 1.326 Not Specified PASS 8DPSK HCH 1.330 Not Specified PASS Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 2 of 45 Test Graph Graphs GFSK/LCH GFSK/MCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 3 of 45 GFSK/HCH π/4DQPSK/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 4 of 45 π/4DQPSK/MCH π/4DQPSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 5 of 45 8DPSK/LCH 8DPSK/MCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 6 of 45 8DPSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 7 of 45 A.2 Dwell Time Mode Packet Chann el Burst Width [s/hop/ch] Total Hops[hop*ch] Dwell Time[s] Limit [s] Verdic t GFSK DH5 LCH 0.002893 106.7 0.308732 0.4 PASS GFSK DH5 MCH 0.002895 106.7 0.308927 0.4 PASS GFSK DH5 HCH 0.002893 106.7 0.308697 0.4 PASS π/4DQPSK 2DH5 LCH 0.002899 106.7 0.309278 0.4 PASS π/4DQPSK 2DH5 MCH 0.002901 106.7 0.309537 0.4 PASS π/4DQPSK 2DH5 HCH 0.002902 106.7 0.309611 0.4 PASS 8DPSK 3DH5 LCH 0.002902 106.7 0.309616 0.4 PASS 8DPSK 3DH5 MCH 0.002902 106.7 0.309616 0.4 PASS 8DPSK 3DH5 HCH 0.002901 106.7 0.309588 0.4 PASS Test Graph Graphs GFSK_DH5/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 8 of 45 GFSK_DH5/MCH GFSK_DH5/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 9 of 45 π/4DQPSK _2DH5/LCH π/4DQPSK _2DH5/MCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 10 of 45 π/4DQPSK _2DH5/HCH 8DPSK _3DH5/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 11 of 45 8DPSK _3DH5/MCH 8DPSK _3DH5/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 12 of 45 A.3 Carrier Frequency Separation Mode Channel. Carrier Frequency Separation [MHz] Limit [MHz] Verdict GFSK LCH 1.000 0.624 PASS GFSK MCH 1.000 0.629 PASS GFSK HCH 0.996 0.627 PASS π/4DQPSK LCH 0.997 0.886 PASS π/4DQPSK MCH 1.001 0.889 PASS π/4DQPSK HCH 0.997 0.883 PASS 8DPSK LCH 0.999 0.887 PASS 8DPSK MCH 0.999 0.884 PASS 8DPSK HCH 1.000 0.887 PASS Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 13 of 45 Test Graph Graphs GFSK/LCH GFSK/MCH GFSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 14 of 45 π/4DQPSK/LCH π/4DQPSK/MCH π/4DQPSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 15 of 45 8DPSK/LCH 8DPSK/MCH 8DPSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 16 of 45 A.4 Hopping Channel Number Mode Channel. Number of Hopping Channel[N] Limit[N] Verdict GFSK Hop 79 >=15 PASS π/4DQPSK Hop 79 >=15 PASS 8DPSK Hop 79 >=15 PASS Test Graph Graphs GFSK/Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 17 of 45 π/4DQPSK/Hop 8DPSK/Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 18 of 45 A.5 Conducted Peak Output Power Mode Channel. Maximum Peak Output Power [dBm] Limit [dBm] Verdict GFSK LCH 4.759 21 PASS GFSK MCH 4.923 21 PASS GFSK HCH 5.178 21 PASS π/4DQPSK LCH 7.114 21 PASS π/4DQPSK MCH 7.258 21 PASS π/4DQPSK HCH 7.899 21 PASS 8DPSK LCH 8.212 21 PASS 8DPSK MCH 8.094 21 PASS 8DPSK HCH 7.962 21 PASS Test Graph Graphs GFSK/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 19 of 45 GFSK/MCH GFSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 20 of 45 π/4DQPSK/LCH π/4DQPSK/MCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 21 of 45 π/4DQPSK/HCH 8DPSK/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 22 of 45 8DPSK/MCH 8DPSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 23 of 45 A.6 Band-edge for RF Conducted Emissions Type Carrier Frequency(MHz ) Frequency(MHz ) Carrier Frequency Power [dBm] Bandedge Peak(dBm) Upper limit(dBm) Conclusion 1DH5 2402 2400 4.29 -55.16 -15.71 Pass 1DH5 2480 2488.014 4.88 -52.958 -15.12 Pass 2DH5 2402 2400 4.685 -42.11 -15.315 Pass 2DH5 2480 2487.229 3.219 -48.226 -16.781 Pass 3DH5 2402 2400 3.534 -41.68 -16.466 Pass 3DH5 2480 2484.305 4.278 -45.165 -15.722 Pass 1DH5-Hopping 2402 2400 4.832 -54.08 -15.168 Pass 1DH5-Hopping 2480 2485.99 4.948 -51.856 -15.052 Pass 2DH5-Hopping 2402 2400 5.323 -47.56 -14.677 Pass 2DH5-Hopping 2480 2483.5 5.08 -51.88 -14.92 Pass 3DH5-Hopping 2402 2400 5.219 -40.98 -14.781 Pass 3DH5-Hopping 2480 2485.99 4.122 -50.51 -15.878 Pass Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 24 of 45 Test Graph Graphs GFSK/LCH/No Hop GFSK/HCH/No Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 25 of 45 π/4DQPSK/LCH/No Hop π/4DQPSK/HCH/No Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 26 of 45 8DPSK/LCH/No Hop 8DPSK/HCH/No Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2AQK8-D60 Report No.: TZ191201196-E Page 27 of 45 GFSK/LCH/Hop GFSK/HCH/Hop Shenzhen Tongzhou Testing Co.,Ltd FCC …

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Report No.:TZ191201196-E Page 1 of 35 FCC TEST REPORT Test report On Behalf of Chandasung Tech (Shenzhen) Co., Ltd For Bluetooth headset Model No: D60,D56C FCC ID: 2AQK8-D60 Prepared for : Chandasung Tech (Shenzhen) Co., Ltd Rm 802, Building B, Zhonghengsheng High-tech Zone, No.3 Xinyu Road Xinqiao Street, Bao’an District, Shenzhen, China. Prepared By : Shenzhen Tongzhou Testing Co.,Ltd 1th Floor, Building 1, Haomai High-tech Park, Huating Road 387, Dalang Street, Longhua, Shenzhen, China Date of Test: 2020/1/12~ 2020/1/18 Date of Report: 2020/3/16 Report Number: TZ191201196-E Report No.:TZ191201196-E Page 2 of 35 TEST RESULT CERTIFICATION Applicant’s name ................. : Chandasung Tech (Shenzhen) Co., Ltd Address .................................. : Rm 802, Building B, Zhonghengsheng High-tech Zone, No.3 Xinyu Road Xinqiao Street, Bao’an District, Shenzhen, China. Manufacture's Name ............ : Chandasung Tech (Shenzhen) Co., Ltd Address .................................. : Rm 802, Building B, Zhonghengsheng High-tech Zone, No.3 Xinyu Road Xinqiao Street, Bao’an District, Shenzhen, China. Product description Trade Mark ............................. : CDX Product name ........................... : Bluetooth headset Model No ................................ : D60,D56C Standards ............................. : FCC Rules and Regulations Part 15 Subpart C Section 15.247 ANSI C63.10: 2013 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Tongzhou Testing Co.,Ltd is acknowledged as copyright owner and source of the material. Shenzhen Tongzhou Testing Co.,Ltd takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................. ........... : Date (s) of performance of tests ........... : 2020/1/12~ 2020/1/18 Date of Issue ......................................... : 2020/3/16 Test Result ............................................ : PASS Testing Engineer : (Anna Hu) Technical Manager : (Hugo Chen) Authorized Signatory : (Andy Zhang) Report No.:TZ191201196-E Page 3 of 35 Revision History Revision Issue Date Revisions Revised By 00 2020/3/16 Initial Issue Andy Zhang Report No.:TZ191201196-E Page 4 of 35 TABLE OF CONTENTS Description Page 1. GENERAL INFORMATION ................................................................................................................ 5 1.1. Description of Device (EUT) ................................................................................................................... 5 1.2 Support equipment List ................................................................................................................................ 5 1.3 External I/O Cable ........................................................................................................................................ 5 1.4 Description of Test Facility .......................................................................................................................... 5 1.5 Statement of the Measurement Uncertainty ............................................................................................. 6 1.6 Measurement Uncertainty ........................................................................................................................... 6 1.7 Description of Test Modes .......................................................................................................................... 6 2. TEST METHODOLOGY/ ..................................................................................................................... 7 2.1 EUT Configuration ........................................................................................................................................ 7 2.2 EUT Exercise ................................................................................................................................................ 7 2.3 General Test Procedures ............................................................................................................................ 7 2.4. Test Sample ................................................................................................................................................. 7 3. SYSTEM TEST CONFIGURATION .................................................................................................. 8 3.1 Justification .................................................................................................................................................... 8 3.2 EUT Exercise Software ............................................................................................................................... 8 3.3 Special Accessories ..................................................................................................................................... 8 3.4 Block Diagram/Schematics ......................................................................................................................... 8 3.5 Equipment Modifications ............................................................................................................................. 8 3.6 Test Setup ..................................................................................................................................................... 8 4. SUMMARY OF TEST RESULTS ....................................................................................................... 9 5. SUMMARY OF TEST EQUIPMENT ............................................................................................... 10 6. MEASUREMENT RESULTS ............................................................................................................ 11 6.1 Peak Power ....................................................................................................................…

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Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOB-D60 TEST SETUP PHOTOS OF THE EUT Radiated Emission Below 1GHz Radiated Emission Above 1GHz