JFZCKS30TWPRWireless Headphones

Applicant Declaration QSF27-14-04 Rev 1.1 Jan 17, 2024 Page 1 of 1 Original Issue: Jan. 4, 2021 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Legal Business Name Audio-Technica Corporation Address 2-46-1 Nishi-naruse, Machida, Tokyo, Japan, 194-8666 FRN 0028730448 Grantee Code JFZ FCC ID JFZCK30TWPR Authorized Contact Name Fumio Kamimura Contact Email [email protected] Contact Phone +81-42-7399168 I, the undersigned, certify that I am an authorized signatory for the Applicant and therefore declare; a) in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and belief. b) in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations made in this application, the Applicant is responsible for: (1) labeling the equipment with the exact FCC ID as specified in this application, (2) compliance statement labeling pursuant to the applicable rules, (3) compliance of the equipment with the applicable technical rules, c) if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCC’s technical requirements. d) in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the responsible party and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. e) in accordance with ISO 17065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accepts and agrees to abide by the post market surveillance requirements. (1) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing. (2) the Applicant shall make provisions to always have a production sample available upon request by SGS, FCC and/or ISED. (3) the Applicant shall, upon request by SGS, at the Applicant’s expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. f) neither the Applicant nor any party to the application is subject to a 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 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a “party” for these purposes. g) the Applicant has read, understood, accepts and agrees to abide by the SGS North America, Inc.(TCB) terms and conditions. Link to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-regulations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01130.html Link to the Covered List: Covered List Audio-Technica Corporation (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Audio-Technica Corporation (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] identified on the Covered list, established pursuant to §1.50002, as an entity producing “covered” equipment. Applicant Signature: Date: 2024-03-19 Print Name: Fumio Kamimura Title: General Manager, Engineering Planning Division *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database

Audio-Technica Corporation 2-46-1 Nishi-naruse, Machida, Tokyo, Japan, 194-8666 Date : 2024-03-19 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road, Columbia, MD 21046 LETTER FOR AUTHORIZATION FCC ID: JFZCK30TWPR To whom it may concern: I, the undersigned, hereby authorize SGS Korea Co., Ltd. and hereafter referred to as SGS Korea, to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by SGS Korea Co., Ltd. on our behalf shall have the same effect as acts of our own. I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing SGS Korea as our agent, we still recognize that we are responsible to: a) comply with the relevant provisions of the certification program; b) make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints; c) make claims regarding certification only in respect of the scope for which certification has been granted; d) do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized; e) upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division; Audio-Technica Corporation 2-46-1 Nishi-naruse, Machida, Tokyo, Japan, 194-8666 f) use certification only to indicate the products are certified as being in conformity with specified standards; g) endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner; h) ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division; i) keep a record of all complaints made known to the us relating to the product’s compliance with requirements of the relevant standard and to make these records available to the Certification Division when requested; j) take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification; k) document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely Yours Name : Fumio Kamimura Title : General Manager, Engineering Planning Division Company Name : Audio-Technica Corporation

Audio-Technica Corporation 2-46-1 Nishi-naruse, Machida, Tokyo, Japan, 194-8666 Date : 2024-03-19 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road, Columbia, MD 21046 REQUEST FOR CONFIDENTIALITY FCC ID: JFZCK30TWPR Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules (CFR 47), and Section 552 (b) (4) of the Freedom of Information Act, Audio-Technica Corporation hereby requests confidentiality and treatment of certain information accompanying this application. The materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. We are also hereby request Short-Term Confidentiality for 180 days after the grant as outlined in Public Notice DA 04-1705. This provision will give, Audio-Technica Corporation temporary confidentiality of commercially sensitive information prior to product release. The requested Permanent and Temporary Confidential exhibits are listed as follows: CONFIDENTIAL LIST Permanent 1 Block Diagram 2 Operational Descriptions 3 Schematics Short-Term 4 External Photos 5 Internal Photos 6 Test-Setup Photos 7 User Manual The Applicant understands that pursuant to Rule 0.457, disclosure of this application and all accompanying documentations, where applicable, will not be made public before the date of the Grant for this application. Sincerely Yours Name : Fumio Kamimura Title : General Manager, Engineering Planning Division Company Name : Audio-Technica Corporation

FCC ID : JFZCKS30TWPR IC : 1752 B-CKS30TWPR SAM PLE LABEL & LOCATION LABELLING REQUIREMENTS Th e device is very small and has no display. Label information will be placed in the manual and device packaging. User manual Packaging

.뭔협 SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, 15807 Tel. 031-428-5700 I Fax. 031-427-2371 http://www.sgsgroup.kr FCC SAR TEST REPORT Test File No: F690501-RF-SAR000420-Al Equipment Under Test Wireless Headphones Model Name ATH-CKS30TW+ Applicant Audio-Technica Corporation Page: 1/60 Address of Applicant 2-46-1 Nishi-naruse, Machida, Tokyo 194-8666, Japan FCC ID JFZCKS30TWPR Exposure Category General Population/Uncontrolled Exposure Standards FCC 47 CFR Part 2 (2.1093) IEEE 1528, 2013 Receipt No. GPRI2402000119SR Date of Receipt 2024-02-01 Date ofTest(s) 2024-02-23 ∼ 2024-02-27 Date of Issue 2024-03-28 Test Result Refer to the Page 04 Measurement Uncertainty Refer to the Page 2 7 In the configuration tested, the EUT complied with the standards specified above. This test report does not assure KOLAS accreditation. Remarks: 1) The results of this test report are effective only to the items tested. 2) The SGS Korea is not responsible for the sampling, the results of this test report apply to the sample as received. σ'17~ Report prepared by I A~proved by I Green Im Minhyuk Han Test Engineer Technical Manager Report File No : F690501-RF-SAR000420-A I Date of Issue : 2024-03-28 (All SGS services are rendered in accordance with the applicable SGS conditions of service available on request and accessible at httn://www.s11:s.com/en/Terms-and-Conditions.asnx.) SAR7081-04 (2020.12.15)(0) A4 (210mm x 297mm) SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, 15807 Tel. 031-428-5700 / Fax. 031-427-2371 http://www.sgsgroup.kr Page : 2/60 Report File No : F690501-RF-SAR000420-A1Date of Issue : 2024-03-28 (All SGS services are rendered in accordance with the applicable SGS conditions of service available on request and accessible at http://www.sgs.com/en/Te rms-and-Conditions.aspx.) SAR7081-04 (2020.12.15)(0) A4 (210mm x 297mm) Revision history Revision Date of issue Revisions Revised By - March 14, 2024 Initial issue - A1 March 28, 2024 Added Bluetooth LE Band to Summary Green Im SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, 15807 Tel. 031-428-5700 / Fax. 031-427-2371 http://www.sgsgroup.kr Page : 3/60 Report File No : F690501-RF-SAR000420-A1Date of Issue : 2024-03-28 (All SGS services are rendered in accordance with the applicable SGS conditions of service available on request and accessible at http://www.sgs.com/en/Te rms-and-Conditions.aspx.) SAR7081-04 (2020.12.15)(0) A4 (210mm x 297mm) Table of Contents 1. Testing Laboratory .................................................................................................................................................... 4 2. Details of Manufacturer ............................................................................................................................................ 4 3. Description of EUT(s) .............................................................................................................................................. 4 4. The Highest Reported SAR Values ........................................................................................................................... 4 5. Test Methodology ..................................................................................................................................................... 5 6. Testing Environment ................................................................................................................................................. 5 7. Specific Absorption Rate (SAR) ............................................................................................................................... 6 7.1. Introduction .................................................................................................................................................. 6 7.2. SAR Definition ............................................................................................................................................. 6 7.3. Test Standards and Limits ............................................................................................................................. 6 8. The SAR Measurement System ................................................................................................................................ 8 9. System Components ................................................................................................................................................. 9 9.1. Probe ............................................................................................................................................................. 9 9.2. SAM Phantom .............................................................................................................................................. 9 9.3. Device Holder ............................................................................................................................................... 9 10. SAR Measurement Procedures ............................................................................................................................... 10 10.1. Normal SAR Measurement Procedure ........................................................................................................ 10 11. SAR System Verification ........................................................................................................................................ 12 12. Tissue Simulant Fluid for the Frequency Band....................................................................................................... 13 13. Instruments List ...................................................................................................................................................... 14 14. FCC Power Measurement Procedures .................................................................................................................... 15 15. Measured and Reported SAR ................…

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Model name: ATH-CKS30TW+ It em Contents Antenna Type FPCB Antenna Antenna peak gain Ri ght -1.61 ㏈i Left -0.26 ㏈i Manufacturer / Model name Right AMOTECH / ATH-CKS30TW R_CH Left AMOTECH / ATH-CKS30TW L_CH Address of manufacturer 380, Namdongseo-ro, Namdong-gu, Incheon, Republic of Korea 21629 Test Laboratory AMOTECH Co., Ltd. Right Antenna Length 0.8 cm Right Antenna Width 1.2 cm Left Antenna Length 0.8 cm Left Antenna Width 1.2 cm Antenna Information Right Length Width Length Width Left Pre Approval Sheet Antenna Type : FPCB Model : ATH-CKS30TW R_CH (Bluetooth) Amotech P/N : AMO-FA-CR014 Customer P/N : CAF-0086-00000 2022. 04. 26 AMOTECH Co., Ltd. Cresyn Plan Evaluation Decision Date / / / TBBP-A FREE Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR014) 2/7 AMT-D-059(A4) 2004.12.10(Rev.0) Content 1. Revision history ----------------------------- 3 2. Specifications ----------------------------- 4 2.1 Electrical specifications 2.2 Mechanical specifications 2.3 Part No 3. Structure and material ----------------------------- 7 3.1 Material Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR014) 3/7 AMT-D-059(A4) 2004.12.10(Rev.0) 1. Revision history Rev No. Date Content Page 0 2022.04.26 New Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR014) 4/7 AMT-D-059(A4) 2004.12.10(Rev.0) 2. Specifications 2.1 Electrical specifications Division Item Specification Remark 1 Operating Frequency 2400~2484 MHz 2 Radiation Gain Average [dBi] @2442 MHz Typical -7.76 On the set Peak Gain [dBi] @2442 MHz Typical -1.61 3 Radiation Pattern Omni-directional 4 Impedance Nominal 50 Ω [VSWR = On the SET] Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR014) 5/7 AMT-D-059(A4) 2004.12.10(Rev.0) [ 2D Radiation pattern : On the set ] [ 3D Radiation pattern : On the set ] Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR014) 6/7 AMT-D-059(A4) 2004.12.10(Rev.0) 2.2 Mechanical specification ※ CTF : ① , ②, ⑤, ⑧ 2.3 Part No. Part No. AMO FA CR 014 (1) (2) (3) (4) (1) : Amotech (2) : FPCB antenna (3) : Index of customer (4) : Product code Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR014) 7/7 AMT-D-059(A4) 2004.12.10(Rev.0) 3. Structure and material 3.1 Material No Item Material ① Silk marking White Ink ② Base(CCL) PI 1/2mil, AD 15㎛, Cu 1/2oz (Ni/Au) ③ Coverlay PI 1/2mil (Yellow), AD 15㎛ ④,⑦ Liner Paper ⑤ Adhesive KW-5150 (150㎛) ⑥ Adhesive 3M 467MP (50㎛) Pre Approval Sheet Antenna Type : FPCB Model : ATH-CKS30TW L_CH (Bluetooth) Amotech P/N : AMO-FA-CR015 Customer P/N : CAF-0085-00000 2022. 04. 26 AMOTECH Co., Ltd. Cresyn Plan Evaluation Decision Date / / / TBBP-A FREE Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR015) 2/7 AMT-D-059(A4) 2004.12.10(Rev.0) Content 1. Revision history ----------------------------- 3 2. Specifications ----------------------------- 4 2.1 Electrical specifications 2.2 Mechanical specifications 2.3 Part No 3. Structure and material ----------------------------- 7 3.1 Material Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR015) 3/7 AMT-D-059(A4) 2004.12.10(Rev.0) 1. Revision history Rev No. Date Content Page 0 2022.04.26 New Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR015) 4/7 AMT-D-059(A4) 2004.12.10(Rev.0) 2. Specifications 2.1 Electrical specifications Division Item Specification Remark 1 Operating Frequency 2400~2484 MHz 2 Radiation Gain Average [dBi] @2442 MHz Typical -5.98 On the set Peak Gain [dBi] @2442 MHz Typical -0.26 3 Radiation Pattern Omni-directional 4 Impedance Nominal 50 Ω [VSWR = On the SET] Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR015) 5/7 AMT-D-059(A4) 2004.12.10(Rev.0) [ 2D Radiation pattern : On the set ] [ 3D Radiation pattern : On the set ] Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR015) 6/7 AMT-D-059(A4) 2004.12.10(Rev.0) 2.2 Mechanical specification ※ CTF : ②, ④, ⑦ ,⑨ 2.3 Part No. Part No. AMO FA CR 015 (1) (2) (3) (4) (1) : Amotech (2) : FPCB antenna (3) : Index of customer (4) : Product code Pre Approval Sheet PAGE FPCB TYPE ANTENNA(AMO-FA-CR015) 7/7 AMT-D-059(A4) 2004.12.10(Rev.0) 3. Structure and material 3.1 Material No Item Material ① Silk marking White Ink ② Base(CCL) PI 1/2mil, AD 15㎛, Cu 1/2oz (Ni/Au) ③ Coverlay PI 1/2mil (Yellow), AD 15㎛ ④,⑦ Liner Paper ⑤ Adhesive KW-5150 (150㎛) ⑥ Adhesive 3M 467MP (50㎛)

SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 28 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) High channel SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 29 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) Mode: 8DPSK_hopping function turned on Band edge compliance Low channel High channel SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 30 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) 3. 20 ㏈ Bandwidth and 99 % Bandwidth 3.1. Test Setup EUT Directional Coupler Bluetooth Tester Spectrum Analyzer 3.2. Limit Limit: Not Applicable 3.3. Test Procedure 3.3.1. 20㏈ Bandwidth The test follows ANSI C63.10-2013. The 20㏈ bandwidth was measured with a spectrum analyzer connected to RF antenna connector (conducted measurement) while EUT was operating in transmit mode at the appropriate center frequency. Use the following spectrum analyzer setting: 1. Span = approximately 2 to 5 times the 20 ㏈ bandwidth. 2. RBW ≥ 1 % to 5 % of the 20 ㏈ bandwidth. 3. VBW ≥ 3 x RBW 4. Sweep = auto 5. Detector = peak 6. Trace = max hold The marker-to-peak function to set the mark to the peak of the emission. Use the marker-delta function to measure 20 ㏈ down one side of the emission. Reset the function, and move the marker to the other side of the emission, until it is (as close as possible to) even with the reference marker level. The marker-delta reading at this point is 20 ㏈ bandwidth of the emission. SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 31 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) 3.3.2. 99 % Bandwidth ● The span of the spectrum analyzer shall be set large enough to capture all products of the modulation process, including the emission skirts, around the carrier frequency, but small enough to avoid having other emissions (e.g. on adjacent channels) within the span. ● The detector of the spectrum analyzer shall be set to “Sample”. However, a peak, or peak hold, may be used in place of the sampling detector since this usually produces a wider bandwidth than the actual bandwidth (worst-case measurement). Use of a peak hold (or “Max Hold”) may be necessary to determine the occupied / x ㏈ bandwidth if the device is not transmitting continuously. ● The resolution bandwidth (RBW) shall be in the range of 1 % to 5 % of the actual occupied / x ㏈ bandwidth and the video bandwidth (VBW) shall not be smaller than three times the RBW value. Video averaging is not permitted. Note: It may be necessary to repeat the measurement a few times until the RBW and VBW are in compliance with the above requirement. For the 99 % emission bandwidth, the trace data points are recovered and directly summed in linear power level terms. The recovered amplitude data points, beginning at the lowest frequency, are placed in a running sum until 0.5 % of the total is reached, and that frequency recorded. The process is repeated for the highest frequency data points (starting at the highest frequency, at the right side of the span, and going down in frequency). This frequency is then recorded. The difference between the two recorded frequencies is the occupied bandwidth (or the 99 % emission bandwidth). SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 32 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) 3.4. Test Results Ambient temperature : (23 ± 1) °C Relative humidity : 47 % R.H. Mode Data Rate (Mbps) Channel Frequency (㎒) 20 ㏈Bandwidth (㎒) 99 % Bandwidth (㎒) GFSK 1 Low 2 402 0.911 0.860 Middle 2 441 0.914 0.864 High 2 480 0.908 0.860 π/4DQPSK 2 Low 2 402 1.214 1.146 Middle 2 441 1.235 1.151 High 2 480 1.235 1.151 8DPSK 3 Low 2 402 1.232 1.133 Middle 2 441 1.235 1.137 High 2 480 1.238 1.137 SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 33 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) - Test plots 20 ㏈Bandwidth Mode: GFSK Low Channel Middle Channel High Channel SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 34 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) Mode: π/4DQPSK Low Channel Middle Channel High Channel SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 35 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) Mode: 8DPSK Low Channel Middle Channel High Channel SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 36 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) 99 % Bandwidth Mode: GFSK Low Channel Middle Channel High Channel SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 37 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) Mode: π/4DQPSK Low Channel Middle Channel High Channel SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Nu…

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SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 2 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) INDEX Table of Contents Page 1. General Information --------------------------------------------------------------------------------- 3 2. Transmitter Radiated Spurious Emissions and Conducted Spurious Emissions ---- 10 3. 20 ㏈ Bandwidth & 99 % Bandwidth ---------------------------------------------------------- 31 4. Maximum Peak Conducted Output Power ---------------------------------------------------- 40 5. Carrier Frequency Separation ------------------------------------------------ -------------------- 42 6. Number of Hopping Frequencies ---------------------------------------------------------------- 44 7. Time of Occupancy(Dwell Time) ----------------------------------------------------------------- 46 8. Antenna Requirement ------------------------------------------------------------------------------ 54 SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 3 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) 1. General Information 1.1 Testing Laboratory SGS Korea Co., Ltd. (Gunpo Laboratory) - 10-2, LS-ro 182beon-gil , Gunpo-si, Gyeonggi-do, Korea, 15807 - 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 - Designation number: KR0150 All SGS services are rendered in accordance with the applicable SGS conditions of service available on request and accessible at http://www.sgs.com/en/Terms-and-Conditions.aspx. Phone No. : +82 31 688 0901 Fax No. : +82 31 688 0921 1.2. Details of Applicant FCC Applicant : Audio-Technica Corporation FCC Address : 2-46-1 Nishi-naruse, Machida, Tokyo, Japan, 194-8666 IC Applicant : Audio-Technica Corporation IC Address : 2-46-1 Nishi-naruse, Machida, Tokyo, Japan, 194-8666 Contact Person : Kamimura, Fumio Phone No. : +81 42 739 9129 1.3. Details of Manufacturer Company : Audio-Technica Corporation Address : 2-46-1 Nishi-naruse, Machida, Tokyo, Japan, 194-8666 1.4. Description of EUT Kind of Product Wireless Headphones Model Name ATH-CKS30TW+ Serial Number Conducted: ATH-CKS30TW_1 Radiated: ATH-CKS30TW_2 Power Supply DC 3.7 V Frequency Range 2 402 ㎒ ~ 2 480 ㎒ (Bluetooth) Modulation Technique GFSK Number of Channels 79 channels (Bluetooth) Antenna Type FPCB Antenna Antenna Gain ※ -1.61 ㏈i H/W Version V1.0 S/W Version V1.0 FVIN N/A SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 427 2370 http://www.sgsgroup.kr Report Number: F690501-RF-RTL004895 Page: 4 of 53 RTT7081-02(2020.10.05)(0) A4(210 mm * 297 mm) 1.5. Information about the FHSS characteristics: 1.5.1. Pseudorandom Frequency Hopping Sequence The channel is represented by a pseudo-random hopping sequence hopping through the 79 RF channels. The hopping sequence is unique for the piconet and is determined by the Bluetooth device address of the master; the phase in the hopping sequence is determined by the Bluetooth clock of the master. The channel is divided into time slots where each slot corresponds to an RF hop frequency. Consecutive hops correspond to different RF hop frequencies. The nominal hop rate is 1 600 hops/s. 1.5.2. Equal Hopping Frequency Use The channels of this system will be used equally over the long-term distribution of the hopsets. 1.5.3. Example of a 79 hopping sequence in data mode: 02, 05, 31, 24, 20, 10, 43, 36, 30, 23, 40, 06, 21, 50, 44, 09, 71, 78, 01, 13, 73, 07, 70, 72, 35, 62, 42, 11, 41, 08, 16, 29, 60, 15, 34, 61, 58, 04, 67, 12, 22, 53, 57, 18, 27, 76, 39, 32, 17, 77, 52, 33, 56, 46, 37, 47, 64, 49, 45, 38, 69, 14, 51, 26, 79, 19, 28, 65, 75, 54, 48, 03, 25, 66, 05, 16, 68, 74, 59, 63, 55 1.5.4. System Receiver Input Bandwidth Each channel bandwidth is 1 ㎒. The system receivers have input bandwidths that match the hopping channel bandwidths of their corresponding transmitters and shift frequencies in synchronization with the transmitted signals. 1.5.5. Equipment Description 15.247(a) (1) that the Rx input bandwidths shift frequencies in synchronization with the transmitted signals. 15.247(g): In accordance with the Bluetooth Industry Standard, the system is designed to comply with all of the regulations in Section 15.247 when the transmitter is presented with a continuous data (or information) system. 15.247(h): In accordance with the Bluetooth Industry Standard, the system does not coordinate it channels selection/ hopping sequence with other frequency hopping systems for the express purpose of avoiding the simultaneous occupancy of individual hopping frequencies by multiple transmitters. SGS Korea Co., Ltd. 4, LS-ro 182beon-gil, Gunpo-si, Gyeonggi-do, Korea, 15807 Tel. +82 31 428 5700 / Fax. +82 31 42…

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