2AQSM-TSOUND02340BT&NC Headphone

Tsound02340 FCC Warning 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. Any Changes or modifications 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. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

QF094234 Page 1 of 1 Revision 0 Authority to Act as Agent Date: 2021-01-06 TUV Rheinland Group 762 Park Avenue Youngsville, NC 27596 To Whom It May Concern: I appoint TUV Rheinland (Shenzhen) Co., Ltd. to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the FCC or Industry Canada’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by TUV Rheinland Group, still resides with Tectronics Global Limited / Rm 2106, 21/F, Kwong Kin Trade Centre, No.5, Kin Fat Street, Tuen Mun, Hong Kong For TCB applications, We certify that we are not subject to 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. Further, no party, as defined in 47 CFR 1.2002 (b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you, Agency Agreement Expiration Date: 12 months By : Jacky han (Signature) (Print Name) Title : Product Manager Telephone : +852-2854 2881 On behalf of : +852-2541 4966 (Company Name) Tectronics Global Limited

Confidentiality Letter Date: 2021-01-06 Subject: Confidentiality Request forFCC ID: 2AQSM-TSOUND02340 Pursuant to FCC 47 CRF 0.457(d) and 0.459 and IC RSP-100, Section 10, the applicant requests that a part of the subject FCC/IC application be held confidential. Type of Confidentiality Requested Exhibit Short Term Permanent Block Diagrams Short Term External Photos Short Term Permanent Internal Photos Short Term Permanent Operation Description/Theory of Operation Short Term Permanent Part List/Tune-Up Procedure Short Term Permanent Schematics Short Term Test Setup Photos Short Term Permanent User’s Manual Superior Communications has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality: The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public. Short-Term Confidentiality: The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of 180days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify TUV Rheinland in the event information regarding the product or the product is made available to the public. TUV Rheinland will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04- 1705. Sincerely, By: Jacky han (Signature/Title) (Print name) Tectronics Global Limited

Page 1 of 3 Report No.: STS2012110 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: Tsound02340 Photo 1 Photo 2 Page 2 of 3 Report No.: STS2012110 Photo 3 Photo 4 Page 3 of 3 Report No.: STS2012110 Photo 5 Photo 6

FCC Label 10mm*30mm The label is printed on the shell Model: Tsound02340 FCC ID: 2AQSM-TSOUND02340

Page 1 of 6 Report No.: STS2012110 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: Tsound02340 Photo 1 Photo 2 BT Antenna Page 2 of 6 Report No.: STS2012110 Photo 3 Photo 4 Page 3 of 6 Report No.: STS2012110 Photo 5 Photo 6 Page 4 of 6 Report No.: STS2012110 Photo 7 Photo 8 Page 5 of 6 Report No.: STS2012110 Photo 9 Photo 10 Page 6 of 6 Report No.: STS2012110 Photo 11 Photo 12

RF EXPOSURE EVALUATION METHOD FCC ID: 2AQSM-TSOUND02340 SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. 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 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 is applied to determine SAR test exclusion. Maximum measured transmitter power. BT5.0+EDR The Worst Case Mode 2402-2480MHz Detector PEAK GFSK 6±1dBm π/4-DQPSK 4±1dBm 8DPSK 4±1dBm Remark: The worst case gain of the antenna is 3.53dBi. 3.53dBi logarithmic terms convert to numeric result is nearly 2.25 GFSK 2.48 6.5 7 5.011872336 1.5785 3 π/4-DQPSK 2.48 4.47 5 3.16227766 0.9960 3 8DPSK 2.48 4.92 5 3.16227766 0.9960 3 Mode Limit Maximum Peak Conducted Output Power (dBm) frequency (GHz) Tune up Power(dBm) Tune up Power (mW) Result Threshold at which no SAR required is 1.5785≤ 3.0 for 1-g SAR, Separation distance is 5mm.

Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from STS, all test data presented in this report is only applicable to presented test sample. Shenzhen STS Test Services Co., Ltd. A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China TEL: +86-755 3688 6288 FAX: +86-755 3688 6277 E-mail:[email protected] RADIO TEST REPORT Report No.: STS2012110W01 Issued for Tectronics Global Limited Rm 2106, 21/F, Kwong Kin Trade Centre, No.5, Kin Fat Stre et, Tuen Mun, Hong Kong Product Name: BT&NC Headphone Brand Name: Tsound Model Name: Tsound02340 Series Model: N/A FCC ID: 2AQSM-TSOUND02340 Test Standard: FCC Part 15.247 S T L A B S Page 2 of 76 Report No.: STS2012110W01 TEST RESULT CERTIFICATION Applicant’s Name ................... : Tectronics Global Limited Address .................................. : Rm 2106, 21/F, Kwong Kin Trade Centre, No.5, Kin Fat Street, Tu en Mun, Hong Kong Manufacturer's Name ............. : Honsenn Technology Co.,Ltd Address .................................. : No.230,Er Heng Road ,Wentang Zhuanyao Industrial Zone,Dongcheng District,Do ngguan City,Guangdong province, China Product Description Product Name ........................ : BT&NC Headphone Brand Name ......................... : Tsound Model Name ........................... : Tsound02340 Series Model .......................... : N/A Test Standards ....................... : FCC Part15.247 Test Procedure ....................... : ANSI C63.10-2013 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of STS, this document may be altered or revised by STS, personal only, and shall be noted in the revision of the document. Date of Test ................................ : Date of receipt of test item .......... : 16 Dec. 2020 Date (s) of performance of tests . : 16 Dec. 2020 ~ 26 Dec. 2020 Date of Issue .............................. : 26 Dec. 2020 Test Result .................................. : Pass Testing Engineer : (Chris Chen) Technical Manager : (Sean she) Authorized Signatory : (Vita Li) Page 3 of 76 Report No.: STS2012110W01 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 FREQUENCY HOPPING SYSTEM REQUIREMENTS 10 2.4 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 12 2.5 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 13 2.6 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 14 2.7 EQUIPMENTS LIST 15 3. EMC EMISSION TEST 17 3.1 CONDUCTED EMISSION MEASUREMENT 17 3.2 RADIATED EMISSION MEASUREMENT 21 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 33 4.1 LIMIT 33 4.2 TEST PROCEDURE 33 4.3 TEST SETUP 34 4.4 EUT OPERATION CONDITIONS 34 4.5 TEST RESULTS 35 5. NUMBER OF HOPPING CHANNEL 50 5.1 LIMIT 50 5.2 TEST PROCEDURE 50 5.3 TEST SETUP 50 5.4 EUT OPERATION CONDITIONS 50 5.5 TEST RESULTS 51 6. AVERAGE TIME OF OCCUPANCY 52 6.1 LIMIT 52 6.2 TEST PROCEDURE 52 6.3 TEST SETUP 52 6.4 EUT OPERATION CONDITIONS 52 6.5 TEST RESULTS 53 7. HOPPING CHANNEL SEPARATION MEASUREMEN 59 Page 4 of 76 Report No.: STS2012110W01 Table of Contents Page 7.1 LIMIT 59 7.2 TEST PROCEDURE 59 7.3 TEST SETUP 59 7.4 EUT OPERATION CONDITIONS 59 7.5 TEST RESULTS 60 8. BANDWIDTH TEST 66 8.1 LIMIT 66 8.2 TEST PROCEDURE 66 8.3 TEST SETUP 66 8.4 EUT OPERATION CONDITIONS 66 8.5 TEST RESULTS 67 9. OUTPUT POWER TEST 73 9.1 LIMIT 73 9.2 TEST PROCEDURE 73 9.3 TEST SETUP 73 9.4 EUT OPERATION CONDITIONS 73 9.5 TEST RESULTS 74 10. ANTENNA REQUIREMENT 75 10.1 STANDARD REQUIREMENT 75 10.2 EUT ANTENNA 75 Page 5 of 76 Report No.: STS2012110W01 Revision History Rev. Issue Date Report NO. Effect Page Contents 00 26 Dec. 2020 STS2012110W01 ALL Initial Issue Page 6 of 76 Report No.: STS2012110W01 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247(a)(1) Hopping Channel Separation PASS -- 15.247(a)(1)&(b)(1) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247(d) Conducted Spurious & Band Edge Emission PASS -- 15.247(a)(1)(iii) Number of Hopping Frequency PASS -- 15.247(a)(1)(iii) Dwell Time PASS -- 15.247(a)(1) Bandwidth PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2013. Page 7 of 76 Report No.: STS2012110W01 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ±U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.68dB 2 Unwanted Emissions, conducted ±2.988dB 3 All emissions, radiated 30-1GHz ±4.39dB 4 All emissions, radiated 1G-6GHz ±5.10dB 5 All emissions, radiated>6G ±5.48dB 6 Conducted Emission (9KHz-150KHz) ±2.79dB 7 Conducted Emission (150KHz-30MHz) ±2.80dB Page 8 of 76 Report No.: STS2012110W01 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name BT&NC Headphone Trade Name Tsound Model Name Tsou…

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Page 39 of 76 Report No.: STS2012110W01 For Hopping Band edge GFSK Page 40 of 76 Report No.: STS2012110W01 Temperature: 25°C Relative Humidity: 50% Test Mode: π/4-DQPSK(2Mbps)– 00/39/78 CH Test Voltage: DC 3.7V 00 CH 39 CH Page 41 of 76 Report No.: STS2012110W01 78 CH Page 42 of 76 Report No.: STS2012110W01 For Band edge(it's also the reference level for conducted spurious emission) 00 CH 39 CH Page 43 of 76 Report No.: STS2012110W01 78 CH Page 44 of 76 Report No.: STS2012110W01 For Hopping Band edge π/4-DQPSK Page 45 of 76 Report No.: STS2012110W01 Temperature: 25°C Relative Humidity: 50% Test Mode: 8DPSK(3Mbps) -00/39/78 CH Test Voltage: DC 3.7V 00 CH 39 CH Page 46 of 76 Report No.: STS2012110W01 78 CH Page 47 of 76 Report No.: STS2012110W01 For Band edge(it's also the reference level for conducted spurious emission) 00 CH 39 CH Page 48 of 76 Report No.: STS2012110W01 78 CH Page 49 of 76 Report No.: STS2012110W01 For Hopping Band edge 8DPSK Page 50 of 76 Report No.: STS2012110W01 5. NUMBER OF HOPPING CHANNEL 5.1 LIMIT FCC Part 15.247,Subpart C Section Test Item Limit FrequencyRange (MHz) Result 15.247 (a)(1)(iii) Number of Hopping Channel ≥15 2400-2483.5 PASS Spectrum Parameters Setting Attenuation Auto Span Frequency > Operating FrequencyRange RB 300KHz VB 300KHz Detector Peak Trace Max Hold Sweep Time Auto 5.2 TEST PROCEDURE a. The EUT was directly connected to the spectrum analyzer and antenna output port as show in the block diagram below. b. Spectrum Setting: RBW= 300KHz, VBW=300KHz, Sweep time = Auto. 5.3 TEST SETUP 5.4 EUT OPERATION CONDITIONS Please refer to section 3.1.4 of this report. Page 51 of 76 Report No.: STS2012110W01 5.5 TEST RESULTS Temperature: 25°C Relative Humidity: 60% Test Mode: Hopping Mode -GFSK Mode Test Voltage: DC 3.7V Number of Hopping Channel 79 Hopping channel Page 52 of 76 Report No.: STS2012110W01 6. AVERAGE TIME OF OCCUPANCY 6.1 LIMIT FCC Part 15.247,Subpart C Section Test Item Limit FrequencyRange (MHz) Result 15.247 (a)(1)(iii) Average Time of Occupancy 0.4sec 2400-2483.5 PASS 6.2 TEST PROCEDURE a. The transmitter output (antenna port) was connected to the spectrum analyzer. b. Set RBW =1MHz/VBW =3MHz. c. Use a video trigger with the trigger level set to enable triggering only on full pulses. d. Sweep Time is more than once pulse time. e. Set the center frequency on any frequency would be measure and set the frequency span to zero span. f. Measure the maximum time duration of one single pulse. g. Set the EUT for DH5, DH3 and DH1 packet transmitting. h. Measure the maximum time duration of one single pulse. i. DH5 Packet permit maximum 1600/ 79 / 6 = 3.37 hops per second in each channel (5 time slots RX, 1 time slot TX). So the number of pulses in the observation period of 31.6 seconds is 3.37 x 31.6 = 106.6. j. DH3 Packet permit maximum 1600 / 79 / 4 = 5.06 hops per second in each channel (3 time slots RX, 1 time slot TX). So the number of pulses in the observation period of 31.6 seconds is 5.06 x 31.6 = 160. k. DH1 Packet permit maximum 1600 / 79 / 2 = 10.12 hops per second in each channel (1 time slot RX, 1 time slot TX). So the number of pulses in the observation period of 31.6 seconds is 10.12 x 31.6 = 320. 6.3 TEST SETUP 6.4 EUT OPERATION CONDITIONS Please refer to section 3.1.4 of this report. Page 53 of 76 Report No.: STS2012110W01 6.5 TEST RESULTS Temperature: 25°C Relative Humidity: 50% Test Mode: GFSK(1Mbps)-DH1/DH3/DH5 Test Voltage: DC 3.7V Data Packet Channel pulse time(ms) Dwell Time(s) Limits(s) DH1 middle 0.413 0.132 0.4 DH3 middle 1.656 0.265 0.4 DH5 middle 2.920 0.311 0.4 Page 54 of 76 Report No.: STS2012110W01 CH39-DH1 CH39-DH3 CH39-DH5 Page 55 of 76 Report No.: STS2012110W01 Temperature: 25°C Relative Humidity: 50% Test Mode: π/4-DQPSK(2Mbps)– 2DH1/2DH3/2DH5 Test Voltage: DC 3.7V Data Packet Channel pulse time(ms) Dwell Time(s) Limits(s) 2DH1 middle 0.423 0.135 0.4 2DH3 middle 1.658 0.265 0.4 2DH5 middle 2.924 0.312 0.4 Page 56 of 76 Report No.: STS2012110W01 CH39-2DH1 CH39-2DH3 CH39-2DH5 Page 57 of 76 Report No.: STS2012110W01 Temperature: 25°C Relative Humidity: 50% Test Mode: 8DPSK(3Mbps)– 3DH1/3DH3/3DH5 Test Voltage: DC 3.7V Data Packet Channel pulse time(ms) Dwell Time(s) Limits(s) 3DH1 middle 0.423 0.135 0.4 3DH3 middle 1.658 0.265 0.4 3DH5 middle 2.928 0.312 0.4 Page 58 of 76 Report No.: STS2012110W01 CH39-3DH1 CH39-3DH3 CH39-3DH5 Page 59 of 76 Report No.: STS2012110W01 7. HOPPING CHANNEL SEPARATION MEASUREMEN 7.1 LIMIT Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400-2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. Spectrum Parameter Setting Attenuation Auto Span Frequency > 20 dB Bandwidth or Channel Separation RB 30 kHz (20dB Bandwidth) / 30 kHz (Channel Separation) VB 100 kHz (20dB Bandwidth) / 100 kHz (Channel Separation) Detector Peak Trace Max Hold Sweep Time Auto 7.2 TEST PROCEDURE a. The transmitter output (antenna port) was connected to the spectrum analyser in peak hold mode. b. The resolution bandwidth of 30 kHz and the video bandwidth of 100 kHz were utilised for 20 dB bandwidth measurement. c. The resolution bandwidth of 30 kHz and the video bandwidth of 100 kHz were utilised for channel separation measurement. 7.3 TEST SETUP 7.4 EUT OPERATION CONDITIONS The EUT was programmed to be in continuously transmitting mode. Page 60 of 76 Report No.: STS2012110W01 7.5 TEST RESULTS Temperature: 25°C Relative Humidity: 50% Test Mode: CH00 / CH39 / CH78 (GFSK(1Mbps) Mode) Test Voltage: DC 3.7V Frequency Mark1 Frequency （MHz） Mark2 Frequency （MHz） Ch. Separation (MHz) Limit (MHz) Result 2402 MHz 2401.999 2403.001 1.002 0.910 Complies 2441 MHz…

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Page 1 of 2 FCC ID: 2AQSM-TSOUND02340 DSS Setup photo Model name: Tsound02340 DSS conduction DSS radiation L Page 2 of 2 FCC ID: 2AQSM-TSOUND02340 DSS radiation H