AK8YY2952Wireless Stereo Headset

WF-C500 (UC) [US/FR/LaES] 5-030-789-11(1) WF-C500 Model, Modèle, Modelo: YY2952 Wireless Stereo Headset Casque stéréo sans fil ©2021 Sony Corporation Printed in Vietnam Imprimé en Vietnam https://www.sony.net/ Reference GuideGuide de référenceGuía de referencia https://rd1.sony.net/help/mdr/wfc500/h_zz/ 5-030-789-11(1) For customers in Canada This unit contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions: (1) This unit may not cause interference; and (2) This unit must accept any interference, including interference that may cause undesired operation of the unit. The available scientific evidence does not show that any health problems are associated with using low power wireless devices. There is no proof, however, that these low power wireless devices are absolutely safe. Low power wireless devices emit low levels of radio frequency energy (RF) in the microwave range while being used. Whereas high levels of RF can produce health effects (by heating tissue), exposure of low-level RF that does not produce heating effects causes no known adverse health effects. Many studies of low-level RF exposures have not found any biological effects. Some studies have suggested that some biological effects might occur, but such findings have not been confirmed by additional research. The unit has been tested and found to comply with ISED radiation exposure limits set forth for an uncontrolled environment and meets RSS-102 of the ISED radio frequency (RF) Exposure rules. High volume may adversely affect your hearing. Do not use the unit while walking, driving, or cycling. Doing so may cause traffic accidents. Do not use in hazardous areas unless the surrounding sound can be heard. If water or foreign matter enters the unit, it may result in fire or electric shock. If water or foreign matter enters the unit, stop use immediately and consult your nearest Sony dealer. In particular, be careful in the following cases. • When using the unit near a sink or liquid container Be careful that the unit does not fall into a sink or container filled with water. • When using the unit in the rain or snow, or in humid locations For details on the effects of contact with the human body from the mobile phone or other wireless devices connected to the unit, refer to the instruction manual of the wireless device. If the earbud tips are not securely attached, they may fall off and remain inside the ear during use. Make sure that the earbud tips are securely attached before use. Never insert the USB plug when the unit or charging cable is wet. If the USB plug is inserted while the unit or charging cable is wet, a short circuit may occur due to liquid (tap water, seawater, soft drink, etc.) or foreign matter on the unit or charging cable, and cause abnormal heat generation or malfunction. This product (including accessories) has magnet(s) which may interfere with pacemakers, programmable shunt valves for hydrocephalus treatment, or other medical devices. Do not place this product close to persons who use such medical devices. Consult your doctor before using this product if you use any such medical device. This product (including accessories) has magnet(s). Swallowing magnet(s) could cause serious harm, such as choking hazard or intestinal injuries. If magnets (or a magnet) were swallowed, consult a doctor immediately. Keep this product away from children or other supervised individuals to prevent accidental ingestion. There is a danger that this unit or its small parts may be swallowed. After use, store the unit in the charging case and store in a location out of reach of small children. Note about static electricity If you use the unit when the air is dry, you may experience discomfort due to static electricity accumulated on your body. This is not a malfunction of the unit. You can reduce the effect by wearing clothes made of natural materials that do not easily generate static electricity. IMPORTANT The factory default setting of the voice guidance for this unit is English. The voice guidance can be heard from the unit in the following situations: • When powering on: “Power on” • When powering off: “Power off” • When the remaining battery level is low and recharge is recommended: “Low battery, please recharge headset” • When automatically turning off due to low battery: “Please recharge headset. Power off” • When checking the remaining battery level: “Battery fully charged” / “Battery about 70%” / “Battery about 50%” • When entering pairing mode: “Bluetooth pairing” • When establishing a Bluetooth connection: “Bluetooth connected” • When disconnecting a Bluetooth connection: “Bluetooth disconnected” Precautions The two-dimensional code or the URL on the cover will help you access the help guide that describes useful notes or procedures in details. On water resistant of the unit • The charging case is not water resistant. • Unless the unit is used correctly, water may get into the unit and cause fire, electrocution, or malfunctions. Note the following cautions carefully and use the unit correctly. To maintain water resistant performance Carefully note the precautions below to ensure proper use of the unit. • Do not splash water forcibly into the sound output holes. • Do not drop the unit into water, and do not use underwater. • Do not allow the unit to remain wet in a cold environment, as the water may freeze. To prevent malfunction, make sure to wipe off any water after use. • Do not place the unit in water or use it in a humid place such as a bathroom. • Do not drop the unit or expose it to mechanical shock. Doing so may deform or damage the unit, resulting in deterioration of water resistance performance. On BLUETOOTH® communications • Microwaves emitting from a Bluetooth device may affect the operation of electronic medical devices. Turn off this unit and other Bluetooth devic…

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Sony Group Corporation Authorization Letter To whom it may concern; I hereby authorize the person below Takeshi Kobayashi Sony Corporation to sign the following documents on my behalf. - FCC Form 731 with Grantee code AK8 - Confidentiality request letter - Letter of Agency - Any other application document that needs signature by Grantee for any FCC Part 15 applications by way of any third-party agents. This authorization is valid until further written notice from the applicant. Date: April 1, 2021 Place: Tokyo, Japan Kazuyuki Hori Chief EMC/RF Compliance Specialist Sony Group Corporation

1- 7- 1 Konan Minato-ku Tokyo, 108-0075 Japan Tel No : +81-50-3750-0068 DECLARATION SUBJECT: FCC Application for FCC ID : AK8YY2952 USB port is not used for data exchanged to or from this device via the USB port after the device leaves the factory. It is being used for only charging the internal battery. Sincerely, . NAME: Takeshi Kobayashi TITLE: Compliance manager Applicant: Sony Group Corporation Address: 1-7-1 Konan Minato-ku To kyo, 108-0075 Japan

Sony Group Corporation Special Power of Attorney I, Kazuyuki Hori of Sony Group Corporation, hereby appoint Takeshi Kobayashi of Sony Corporation to represent me to act on my behalf to do any and all of the following. Sign on my behalf the agency, anti-drug and confidentiality cover letters and apply to FCC for the products. The rights, powers and authority in fact to exercise any and all of the rights and powers herein granted shall commence and be in full force from April 1, 2021 and continue to be effective unless specifically terminated by either party. Dated April 1, 2021 Kazuyuki Hori Company: Sony Group Corporation Country: Japan

1-7 -1 Konan Minato-ku Tokyo, 108-0075 Japan Tel No : +81-50-3750-0068 Special Power of Attorney SUBJECT: FCC Application for FCC ID : AK8YY2952 I, Takeshi Kobayashi of Sony Corporation hereby appoint Won Jae, Hwang of CTK Co., Ltd. to represent me to act on my behalf to do any and all of the following : Sign on my behalf the agency, anti-drug and confidentiality cover letters and apply to FCC for the products. The right, powers and authority in fact to exercise any and all of the rights and powers herein granted shell commence and be in full force from 04/21/2021 and continue to effective unless specifically terminated by either party. Sincerely, . NAME: Takeshi Kobayashi TITLE: Compliance manager Applicant: Sony Group Corporation Address: 1-7-1 Konan Minato-ku Tokyo, 108-0075 Japan

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com EUT External Photographs CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Label Photographs CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Back of Packaging

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com EUT Internal Photographs CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Earbuds (L) Antenna Earbuds (R) Antenna

Page 1 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) FCC SAR Test Report Test Report No. : OT-214-RWD-112 Reception No. : 2104001948 Applicant : Sony Group Corporation Address : 1-7-1 Konan Minato-ku Tokyo, 108-0075 Japan Manufacturer : Sony Group Corporation Address : 1-7-1 Konan Minato-ku Tokyo, 108-0075 Japan Type of Equipment : Wireless Stereo Headset FCC ID : AK8YY2952 Model Name : YY2952 Multiple Model Name: N/A Serial number : N/A Total page of Report : 73 pages (including this page) Date of Incoming : Apr. 19, 2021 Date of Test : Apr. 27, 2021 ~ Apr. 28, 2021 Date of issue : Apr. 29, 2021 SUMMARY The equipment complies with the regulation; CFR §2.1093. This test report only contains the result of a single test of the sample supplied for the examination. It is not a generally valid assessment of the features of the respective products of the mass-production. Reviewed by: Approved by: No Gyun, Im / Senior Manager ONETECH Corp. Jung Wook Kim / Technical Manager ONETECH Corp. Page 2 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Revision history Report No. Reason for Change Date Issued OT-214-RWD-112 Initial release 2021-04-29 Page 3 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) TABLE OF CONTENTS 1. Summary of Maximum SAR Value ............................................................................ 4 2. Device Under Test ..................................................................................................... 4 3. INTRODUCTION ...................................................................................................... 6 4. DOSIMETRIC ASSESSMENT .................................................................................. 8 5. TEST CONFIGURATION POSITIONS ...................................................................... 9 6. RF EXPOSURE LIMITS .......................................................................................... 10 7. FCC MEASUREMENT PROCEDURES .................................................................. 11 8. RF CONDUCTED POWERS .................................................................................. 12 9. SYSTEM VERIFICATION ....................................................................................... 14 10. SAR TEST DATA SUMMARY .................................................................................. 16 11. EQUIPMENT LIST .................................................................................................. 18 12. MEASUREMENT UNCERTAINTIES ....................................................................... 19 13. CONCLUSION ........................................................................................................ 20 14. REFERENCES ....................................................................................................... 21 APPENDIX A: SYSTEM VERIFICATION ................................................................................... 23 APPENDIX B: SAR TEST DATA ................................................................................................ 26 APPENDIX C: PROBE & DIPOLE ANTENNA CALIBRATION ................................................... 31 APPENDIX D: SAR TISSUE SPECIFICATIONS ........................................................................ 63 APPENDIX E: SAR SYSTEM VALIDATION ............................................................................... 65 APPENDIX F: DUT ANTENNA DIAGRAM & SAR TEST SETUP PHOTOGRAPHS .................. 66 Page 4 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) 1. Summary of Maximum SAR Value Equipment Class Band & Mode Tx Frequency SAR 1 g Head (W/kg) 1 g Body (W/kg) 10g Hands (W/kg) DSS Bluetooth 2 402 ~ 2 480 MHz 0.11 0.37 0.15 Simultaneous SAR per KDB 690783 D01v01r03: N/A N/A N/A This wireless portable device has been shown to be capable of compliance for localized specific absorption rate (SAR) for uncontrolled environment/general population exposure limits specified in ANSI/IEEE C95.1-1992 and has been tested in accordance with the measurement procedures specified in Section 7 of this report; 2. Device Under Test 2.1. DUT Information DUT Type Wireless Stereo Headset FCC ID AK8YY2952 Model Name YY2952 Additional Model Name(s) N/A Antenna Type FPCB Antenna - Peak Gain: - 5.0 dBi (Right Ear), - 3.8 dBi (Left Ear) DUT Stage Identical Prototype Note: There are two model names for this product. These two models have the same hardware structure and functions, and only the model was divided for the purpose of marketing. 2.2. Device Overview Band & Mode Operating Modes Tx Frequency Bluetooth Data 2 402 ~ 2 480 MHz 2.3. Power Reduction for SAR There is no power reduction used for any band/mode implemented in the device for SAR purposes. 2.4. Nominal and Maximum Output Power Specifications This device operates using the following maximum and nominal output power specifications. SAR values were scaled to the maximum allowed power to determine compliance per KDB Publication 447498 D01 v06. Maximum Bluetooth Output Power Mode / Band Modulated Average (dBm) Bluetooth (BDR – 1 Mbps) Maximum 10.0 Nominal 8.0 Bluetooth (EDR – 2 Mbps) Maximum 7.0 Nominal 5.0 Bluetooth (EDR – 3 Mbps) Maximum 7.0 Nominal 5.0 Bluetooth Maximum 9.0 Nominal 7.0 Page 5 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) 2.5. DUT Antenna Locations The DUT antenna locations are inc…

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Page 31 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) APPENDIX C: PROBE & DIPOLE ANTENNA CALIBRATION Page 32 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 33 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 34 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 35 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 36 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 37 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 38 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 39 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 40 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 41 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 42 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 43 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 44 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 45 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 46 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 47 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 48 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 49 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 50 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 51 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 52 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 53 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 54 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599)

Page 55 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 56 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 57 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 58 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 59 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 60 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 61 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 62 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Page 63 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) APPENDIX D: SAR TISSUE SPECIFICATIONS Measurement Procedure for Tissue verification: 1) The network analyzer and probe system were configured and calibrated. 2) The probe was immersed in the tissue. The tissue was placed in a nonmetallic container. Trapped air bubbles beneath the flange were minimized by placing the probe at a slight angle. 3) The complex admittance with respect to the probe aperture was measured. 4) The complex relative permittivity ε r can be calculated from the below equation (Pournaropoulos and Misra): Table D-1 Composition of the Tissue Equivalent Matter Frequency (MHz) 2 450 Tissue Head Ingredients (% by weight) Bactericide - DGBE - HEC - NaCl 0.1 Sucrose - Tween 20 45.0 Water 54.9 Table D-2 Recommended Tissue Dielectric Parameters (IEC 62209-1) Page 64 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) Figure D-1 Liquid Height for Head & Body Position (SAM Twin Phantom) Figure D-2 Liquid Height for Body Position (ELI Phantom) Page 65 of 73 Report No. OT-214-RWD-112 EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599) APPENDIX E: SAR SYSTEM VALIDATION Per FCC KDB Publication 865664 D02v01r02, SAR system validation status should be documented to confirm measurement accuracy. The SAR systems (including SAR probes, system components and software versions) used for this device were validated against its performance specifications prior to the SAR measurements. Reference dipoles were used with the required tissue-equivalent media for system validation, according to the procedures outlined in FCC KDB Publication 865664 D01v01r04 and IEEE 1528-2013. Since SAR probe calibrations are frequency dependent, each probe calibration point was validated at a frequency within the valid frequency range of the probe calibration point, using the system that normally operates with the probe for routine SAR measurements and according to the required tissue-equivalent media. A tabulated summary of the system validation status including the validation date(s), measurement frequencies, SAR probes and tissue dielectric parameters has been included. Table E-1 SAR System Validation Summary – 1g / 10g SAR System Freq. (MHz) Date Probe SN Probe Cal Point Cond. (σ) Perm. (εr) CW VALIDATION MOD. VALIDATION SENSITIVITY PROBE LINEARITY PROBE ISOTROPY MOD. TYPE DUTY FACTO R PAR 4 750 2021.04.01 3832 750 Head 0.889 41.762 Pass Pass Pass N/A N/A N/A 4 900 2021.04.02 3832 900 Head 0.971 41.975 Pass Pass Pass GMSK PASS N/A 4 1750 2021.04.05 3832 1750 Head 1.348 39.355 Pass Pass Pass N/A N/A N/A 4 1950 2021.04.06 3832 1950 Head 1.411 39.945 Pass Pass Pass GMSK Pass N/A 4 2450 2021.04.07 3832 2450 Head 1.811 39.014 Pass Pass Pass OFDM/TDD Pass N/A Note: Wile the probes have been calibrated for both CW and modulated signals, all measurements were performed using communication systems calibrated for CW signals only. Modulations in the table above represent test configurations for which the measurement system has been validated per FCC KDB Publication 865664 D01v01r04 for scenarios when CW probe calibrations are used with other signal types. SAR systems were validated for modulated signals with a periodic duty cycle, such as GMSK, or with a high peak to average ratio (> 5 dB), such as OFDM according to FCC KDB Publication 865664 D01v01r04.

TEST REPORT CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 Report No.: CTK-2021-01591 Page (1) / (90) Pages QF-QP15-03 R102 Rev.0 1. Client ◦ Name : Sony Group Corporation ◦ Address : 1-7-1 Konan Minato-ku Tokyo, 108-0075 Japan ◦ Date of Receipt : 2021-03-13 2. Manufacturer ◦ Name : Sony Group Corporation ◦ Address : 1-7-1 Konan Minato-ku Tokyo, 108-0075 Japan 3. Use of Report : For FCC Conformance / ISED Conformance 4. Test Sample / Model: Wireless Stereo Headset / YY2952 5. Date of Test : 2021-04-09 to 2021-04-19 6. Test Standard(method) used : FCC 47 CFR part 15 subpart C 15.247 RSS-247 & RSS-Gen 7. Testing Environment: Temp.: (23 ± 1) °C, Humidity: (50 ± 3) % R.H. 8. Test Results : Compliance The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This Test Report cannot be reproduced, except in full. Affirmation Tested by Ji-Hye, Kim: (Signature) Technical Manager Won-Jae, Hwang: (Signature) 2021-04-26 Republic of KOREA CTK Co., Ltd. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 Report No.: CTK-2021-01591 Page (2) / (90) Pages QF-QP15-03 R102 Rev.0 REPORT REVISION HISTORY Date Revision Page No 2021-04-26 Issued (CTK-2021-01591) all This report shall not be reproduced except in full, without the written approval of CTK Co., Ltd. This document may be altered or revised by CTK Co., Ltd. personnel only, and shall be noted in the revision section of the document. Any alteration of this document not carried out by CTK Co., Ltd. will constitute fraud and shall nullify the document. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 Report No.: CTK-2021-01591 Page (3) / (90) Pages QF-QP15-03 R102 Rev.0 CONTENTS 1. General Product Description ....................................................................................... 4 1.1 Client Information ............................................................................................. 4 1.2 Product Information ........................................................................................... 4 1.3 Peripheral Devices ............................................................................................. 4 1.4 Model Differences .............................................................................................. 4 2. Facility and Accreditations .......................................................................................... 5 2.1 Test Facility ...................................................................................................... 5 2.2 Laboratory Accreditations and Listings .................................................................. 5 2.3 Calibration Details of Equipment Used for Measurement .......................................... 5 3. Test Specifications .................................................................................................... 6 3.1 Standards ........................................................................................................ 6 3.2 Mode of operation during the test ........................................................................ 6 3.3 Maximum Measurement Uncertainty .....................…

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