OSDAVENTHO300OVER-EAR WIRELESS HEADPHONES

Letter of Authorization Date: August 19, 2024 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Rd Columbia MD 21046-1609 Subject: Product Certification Representative Authorization Letter FCC ID: OSDAVENTHO300 Product Name: OVER-EAR WIRELESS HEADPHONES To whom it may concern: We the undersigned, hereby authorize following person to act as our agent in the preparation of an application for equipment authorization to the FCC Rules and Regulations. Sporton International Inc. Address : No.52, Huaya 1st Rd., Guishan Dist., Taoyuan City 333, Taiwan (R.O.C.) Name : Leo Huang Job Title : VP e-mail : [email protected] We further certify that neither the applicant nor any party to this application, as defined in 47 CFR Ch. 1.2002(b), is subject to a denial to Federal benefits, that include FCC benefits, pursuant to section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. § 862. This appointment also includes the authority to complete FCC Form 731 on our behalf and sign the application as an authorized agent. Applicant : Beyerdynamic Address : 56 Central Avenue, Farmingdale, New York 11735, United States Signature : _______________________________ Name and Job Title. : Ulrich Roth, Product Compliance Manager E-mail : [email protected] Tel. : 497131617155

Labeling L R HVIN location: You will find the product certification ID marks on the right ear cup under the ear pad for FCC and IC.

TEL : 886-3-327-3456 Page 1 of 20 FAX : 886-3-328-4978 Issued Date : Sep. 13, 2024 Template version: 240125 FCC SAR TEST REPORT Report No. : FA470211 FCC SAR TEST REPORT FCC ID : OSDAVENTHO300 Equipment : OVER-EAR WIRELESS HEADPHONES Brand Name : beyerdynamic Model Name : AVENTHO 300 Marketing Name : OVER-EAR WIRELESS HEADPHONES Applicant : Beyerdynamic 56 Central Avenue, Farmingdale, New York 11735 United States Manufacturer : beyerdynamic GmbH & Co. KG Theresienstraß e 8, 74072 Heilbronn, Germany Standard : FCC 47 CFR Part 2 (2.1093) The product was received on Aug. 19, 2024 and testing was started from Aug. 31, 2024 and completed on Aug. 31, 2024. We, SPORTON INTERNATIONAL INC., would like to declare that the tested sample provide by manufacturer and the test data has been evaluated in accordance with the test procedures given in 47 CFR Part 2.1093 and FCC KDB and has been pass the FCC requirement. The test results in this report apply exclusively to the tested model / sample. Without written approval of SPORTON INTERNATIONAL INC. Laboratory, the test report shall not be reproduced except in full. Sporton International Inc. Wensan Laboratory No.58, Aly. 75, Ln. 564, Wenhua 3rd, Rd., Guishan Dist., Taoyuan City 333010, Taiwan Approved by: Cona Huang / Deputy Manager TEL : 886-3-327-3456 Page 2 of 20 FAX : 886-3-328-4978 Issued Date : Sep. 13, 2024 Template version: 240125 FCC SAR TEST REPORT Report No. : FA470211 Table of Contents 1. Statement of Compliance ............................................................................................................................................. 4 2. Guidance Applied .......................................................................................................................................................... 4 3. Equipment Under Test (EUT) Information ................................................................................................................... 5 3.1 General Information ............................................................................................................................................... 5 4. RF Exposure Limits....................................................................................................................................................... 6 4.1 Uncontrolled Environment ...................................................................................................................................... 6 4.2 Controlled Environment .......................................................................................................................................... 6 5. Specific Absorption Rate (SAR) ................................................................................................................................... 7 5.1 Introduction ............................................................................................................................................................ 7 5.2 SAR Definition ........................................................................................................................................................ 7 6. System Description and Setup .................................................................................................................................... 8 6.1 Test Site Location ................................................................................................................................................... 8 6.2 E-Field Probe ......................................................................................................................................................... 9 6.3 Data Acquisition Electronics (DAE) ........................................................................................................................ 9 6.4 Phantom ................................................................................................................................................................10 6.5 Device Holder........................................................................................................................................................ 11 7. Measurement Procedures ...........................................................................................................................................12 7.1 Spatial Peak SAR Evaluation ................................................................................................................................12 7.2 Power Reference Measurement............................................................................................................................13 7.3 Area Scan .............................................................................................................................................................13 7.4 Zoom Scan ............................................................................................................................................................14 7.5 Volume Scan Procedures ......................................................................................................................................15 7.6 Power Drift Monitoring ...........................................................................................................................................15 8. Test Equipment List .....................................................................................................................................................15 9. System Verification ......................................................................................................................................................16 9.1 Tissue Verification .................................................................................................................................................16 9.2 System Performance Check Results .....................................................................................…

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Test Laboratory: Sporton International Inc. SAR/HAC Testing Lab Date: 2024/8/31 System Check_Head_2450MHz DUT: D2450V2-929 Communication System: UID 0, CW; Frequency: 2450 MHz;Duty Cycle: 1:1 Medium: HSL_2450_240831 Medium parameters used : f = 2450 MHz; σ = 1.78 S/m; ε r = 39.159; ρ = 1000 kg/m 3 Ambient Temperature：23.6 °C; Liquid Temperature：22.6 °C DASY5 Configuration: - Probe: EX3DV4 - SN7700; ConvF(7.72, 7.83, 7.84) @ 2450 MHz; Calibrated: 2024/2/1 - Sensor-Surface: 1.4mm (Mechanical Surface Detection) - Electronics: DAE4 Sn1707; Calibrated: 2023/12/6 - Phantom: SAM_Left; Type: QD000P40CD; Serial: TP:1684 - Measurement SW: DASY52, Version 52.10 (4);SEMCAD X Version 14.6.14 (7501) Pin=50mW/Area Scan (61x61x1): Interpolated grid: dx=1.200 mm, dy=1.200 mm Maximum value of SAR (interpolated) = 3.95 W/kg Pin=50mW/Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 47.04 V/m; Power Drift = 0.04 dB Peak SAR (extrapolated) = 4.74 W/kg SAR(1 g) = 2.41 W/kg; SAR(10 g) = 1.14 W/kg Smallest distance from peaks to all points 3 dB below = 9 mm Ratio of SAR at M2 to SAR at M1 = 51.4% Maximum value of SAR (measured) = 3.94 W/kg 0 dB = 3.94 W/kg = 5.95 dBW/kg Appendix AReport No.:FA470211 Page1/1

Test Laboratory: Sporton International Inc. SAR/HAC Testing Lab Date: 2024/8/31 #01_Bluetooth_1Mbps_Right Cheek_0mm_Ch78 Communication System: UID 10032 - CAA, IEEE 802.15.1 Bluetooth ; Frequency: 2480 MHz Medium: HSL_2450_240831 Medium parameters used: f = 2480 MHz; σ = 1.822 S/m; ε r = 39.031; ρ = 1000 3 kg/m Ambient Temperature：23.6 °C; Liquid Temperature：22.6 °C DASY5 Configuration: - Probe: EX3DV4 - SN7700; ConvF(7.72, 7.83, 7.84) @ 2480 MHz; Calibrated: 2024/2/1 - Sensor-Surface: 1.4mm (Mechanical Surface Detection) - Electronics: DAE4 Sn1707; Calibrated: 2023/12/6 - Phantom: SAM_Left; Type: QD000P40CD; Serial: TP:1684 - Measurement SW: DASY52, Version 52.10 (4);SEMCAD X Version 14.6.14 (7501) Area Scan (91x101x1): Interpolated grid: dx=1.200 mm, dy=1.200 mm Maximum value of SAR (interpolated) = 0.0187 W/kg Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 2.197 V/m; Power Drift = 0.06 dB Peak SAR (extrapolated) = 0.0140 W/kg SAR(1 g) = 0.00648 W/kg; SAR(10 g) = 0.00303 W/kg Smallest distance from peaks to all points 3 dB below: Larger than measurement grid (> 15 mm) Ratio of SAR at M2 to SAR at M1 = 47% Maximum value of SAR (measured) = 0.0108 W/kg 0 dB = 0.0108 W/kg = -19.67 dBW/kg Appendix BReport No.:FA470211 Page1/1

Appendix CReport No.:FA470211 Page1/36 Appendix CReport No.:FA470211 Page2/36 Appendix CReport No.:FA470211 Page3/36 Appendix CReport No.:FA470211 Page4/36 Appendix CReport No.:FA470211 Page5/36 Appendix CReport No.:FA470211 Page6/36 Appendix CReport No.:FA470211 Page7/36 SPORTON INTERNATIONAL INC. TEL : 886-3-327-3456 FAX : 886-3-328-4978 D2450V2, serial no. 929 Extended Dipole Calibrations If dipoles are verified in return loss (<-20dB, within 20% of prior calibration), and in impedance (within 5 ohm of prior calibration), the annual calibration is not necessary and the calibration interval can be extended. <Justification of the extended calibration> D2450V2 – serial no. 929 2450MHZ Date of Measurement Return-Loss (dB) Delta (%) Real Impedance (ohm) Delta (ohm) Imaginary Impedance (ohm) Delta (ohm) 11.21.2022 (Cal. Report) -25.5 52.9 4.7 11.20.2023 (extended) -25.9 1.57 52.3 -0.6 4.8 0.1 The return loss is < -20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. Appendix CReport No.:FA470211 Page8/36 SPORTON INTERNATIONAL INC. TEL : 886-3-327-3456 FAX : 886-3-328-4978 <Dipole Verification Data> - D2450 V2, serial no. 929 (Data of Measurement : 11.20.2023) 2450MHz - Head Appendix CReport No.:FA470211 Page9/36 Appendix CReport No.:FA470211 Page10/36 Appendix CReport No.:FA470211 Page11/36 Appendix CReport No.:FA470211 Page12/36 Appendix CReport No.:FA470211 Page13/36 Appendix CReport No.:FA470211 Page14/36 Appendix CReport No.:FA470211 Page15/36 Appendix CReport No.:FA470211 Page16/36 Appendix CReport No.:FA470211 Page17/36 Appendix CReport No.:FA470211 Page18/36 Appendix CReport No.:FA470211 Page19/36 Appendix CReport No.:FA470211 Page20/36 Appendix CReport No.:FA470211 Page21/36 Appendix CReport No.:FA470211 Page22/36 Appendix CReport No.:FA470211 Page23/36 Appendix CReport No.:FA470211 Page24/36 Appendix CReport No.:FA470211 Page25/36 Appendix CReport No.:FA470211 Page26/36 Appendix CReport No.:FA470211 Page27/36 Appendix CReport No.:FA470211 Page28/36 Appendix CReport No.:FA470211 Page29/36 Appendix CReport No.:FA470211 Page30/36 Appendix CReport No.:FA470211 Page31/36 Appendix CReport No.:FA470211 Page32/36 Appendix CReport No.:FA470211 Page33/36 Appendix CReport No.:FA470211 Page34/36 Appendix CReport No.:FA470211 Page35/36 Appendix CReport No.:FA470211 Page36/36

FCC Radio Test Report Report No. : FR470211AL TEL : 886-3-3273456 Page Number : 1 of 25 FAX : 886-3-3270973 Issued Date : Sep. 04, 2024 Report Template No.: HE1-C10 Ver4.3 Report Version : 01 FCC ID: OSDAVENTHO300 FCC Radio Test Report FCC ID : OSDAVENTHO300 Equipment : OVER-EAR WIRELESS HEADPHONES Brand Name : beyerdynamic Model Name : AVENTHO 300 Applicant : Beyerdynamic 56 Central Avenue, Farmingdale, New York 11735 United States Manufacturer : beyerdynamic GmbH & Co. KG Theresienstraß e 8, 74072 Heilbronn, Germany Standard : 47 CFR FCC Part 15.247 The product was received on Jul. 03, 2024, and testing was started from Aug. 02, 2024 and completed on Aug. 16, 2024. We, SPORTON INTERNATIONAL INC. Hsinhua Laboratory, would like to declare that the tested sample has been evaluated in accordance with the procedures given in ANSI C63.10-2013 and shown compliance with the applicable technical standards. The test results in this report apply exclusively to the tested model / sample. Without written approval of SPORTON INTERNATIONAL INC. Hsinhua Laboratory, the test report shall not be reproduced except in full. ___________________________________________ Approved by: Jackson Tsai __________________________________________ SDoC by: XXXXX SPORTON INTERNATIONAL INC. Hsinhua Laboratory No.52, Huaya 1st Rd., Guishan Dist., Taoyuan City 333411, Taiwan (R.O.C.) FCC Radio Test Report Report No. : FR470211AL TEL : 886-3-3273456 Page Number : 2 of 25 FAX : 886-3-3270973 Issued Date : Sep. 04, 2024 Report Template No.: HE1-C10 Ver4.3 Report Version : 01 FCC ID: OSDAVENTHO300 Table of Contents HISTORY OF THIS TEST REPORT .................................................................................................................. 3 SUMMARY OF TEST RESULT ......................................................................................................................... 4 1 GENERAL DESCRIPTION .................................................................................................................... 5 1.1 Information .............................................................................................................................................. 5 1.2 Testing Applied Standards ..................................................................................................................... 7 1.3 Testing Location Information .................................................................................................................. 7 1.4 Measurement Uncertainty ...................................................................................................................... 7 2 TEST CONFIGURATION OF EUT......................................................................................................... 8 2.1 Test Channel Mode ................................................................................................................................ 8 2.2 The Worst Case Measurement Configuration ........................................................................................ 9 2.3 Accessories .......................................................................................................................................... 10 2.4 Support Equipment ............................................................................................................................... 10 2.5 Test Setup Diagram ............................................................................................................................. 11 3 TRANSMITTER TEST RESULT .......................................................................................................... 13 3.1 AC Power-line Conducted Emissions .................................................................................................. 13 3.2 DTS Bandwidth..................................................................................................................................... 15 3.3 Maximum Conducted Output Power .................................................................................................... 16 3.4 Power Spectral Density ........................................................................................................................ 18 3.5 Emissions in Non-restricted Frequency Bands .................................................................................... 19 3.6 Emissions in Restricted Frequency Bands ........................................................................................... 20 4 TEST EQUIPMENT AND CALIBRATION DATA ................................................................................ 24 APPENDIX A. TEST RESULTS OF AC POWER-LINE CONDUCTED EMISSIONS APPENDIX B. TEST RESULTS OF DTS BANDWIDTH APPENDIX C. TEST RESULTS OF MAXIMUM CONDUCTED OUTPUT POWER APPENDIX D. TEST RESULTS OF POWER SPECTRAL DENSITY APPENDIX E. TEST RESULTS OF EMISSIONS IN NON-RESTRICTED FREQUENCY BANDS APPENDIX F. TEST RESULTS OF EMISSIONS IN RESTRICTED FREQUENCY BANDS APPENDIX G. TEST PHOTOS PHOTOGRAPHS OF EUT V01 FCC Radio Test Report Report No. : FR470211AL TEL : 886-3-3273456 Page Number : 3 of 25 FAX : 886-3-3270973 Issued Date : Sep. 04, 2024 Report Template No.: HE1-C10 Ver4.3 Report Version : 01 FCC ID: OSDAVENTHO300 History of this test report Report No. Version Description Issued Date FR470211AL 01 Initial issue of report Sep. 04, 2024 FCC Radio Test Report Report No. : FR470211AL TEL : 886-3-3273456 Page Number : 4 of 25 FAX : 886-3-3270973 Issued Date : Sep. 04, 2024 Report Template No.: HE1-C10 Ver4.3 Report Version : 01 FCC ID: OSDAVENTHO300 Summary of Test Result Report Clause Ref.Std. Clause Test Items Result (PASS/FAIL) Remark 1.1.2 15.203 Antenna Requirement PASS - 3.1 15.207 AC Power-line Conducted Emissions PASS - 3.2 15.247(a) DTS Bandwidth PASS - 3.3 15.247(b) Maximum Conducted Output Power PASS - 3.4 15.247(e) Power Spectral Density PASS - 3.5 15.247(d) Emissions in Non-restricted Frequency Bands PASS - 3.6 15.247(d) Emiss…

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Beyerdynamic Traveller Aventho300Antenna Datasheet Date: 2024-07-10 Doc. Version: 1.0 Designer: Simon Wu Customer Name: Beyerdynamic P/N S306300001000-A 品名 Chip Antenna Index 1. Introduction 2. Revision History 3. Antenna Drawings 4. Matching circuit 5. Antenna Performance 1. Introduction Part Antenna Location Earphone Antenna Type Chip 2. Revision History Date Version Revision History 2024-07-10 1.0 New Release 3. Antenna Drawings 4. Matching circuit 5. Antenna Performance 5.1 VSWR, Return Loss, Smith Chart 5.2 Antenna Gain and Efficiency 2.402 GHz 2.441 GHz 2.480 GHz Gain (dBi) -1.16 -1.11 -2.61 Efficiency (%) 26.21 27.45 21.89 5.3 Antenna Radiation Pattern XZ XY ZY