ZBCTW602ATrue Wireless Earbuds

TrueWirelessEarphone Model：TW-602A Usermanual Packinglist： 1.TrueWirelessEarphone+Chargingcasex1 2.Usermanualx1 3.Type-Ccable Product FCC ID: ZBCTW602A Pairing 1.Takeouttwoearbuds,they'llbepoweronautomaticallyandenterpairingmode.MasterTWS, RedOrWhiteLEDfastFlashingSlaveTWS,WhiteLEDFlashingper5s. 2.Enablebluetoothofsmartphonetosearch"TW-602A"andthenclickitforpairing. 3.Afterthesettingdone,theconnectioninterfaceoftheotherearbudshouldappearon smartphone.Clickittoconfirmandallsettingsaredonecompletely. Earphoneoperation: 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. Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

Form: RFT-AMER-TCB-OP-19o Revision: 1 Page 1 of 1 Date: 1/25/2023 SHENZHEN DNS INDUSTRIES CO., LTD. Attention: Application Examiner Re: Certification designating a U.S. agent for service of process pursuant to section 2.911(d)(7) of the FCC rules To whom it may concern, This letter is to confirm both DNS INDUSTRIES (USA) INC (“Agent”) and SHENZHEN DNS INDUSTRIES CO., LTD. (“Applicant”) acknowledge consent to obligations of each party pursuant to 47 CFR part §2.911(d)(7) of the FCC rules in regard to the agent for service of process. I Yuki Wu HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Applicant. I further acknowledge the requirement to maintain an agent extends for no less than one year after the termination of all marketing and importation or the conclusion of and commission-related proceeding involving the equipment and agree to immediately notify the FCC and Intertek if there is any change in the status identified above. Applicant Company Name : SHENZHEN DNS INDUSTRIES CO., LTD. Contact Name : Yuki Wu Address : 23/F Building A, Shenzhen International Innovation Center, No.1006 Shennan Road, Futian, Shenzhen, China Telephone No : +86-0755-83401338 Email : [email protected] FCC ID : ZBCTW602A Applicant FRN : 0020639597 Signature: ____ ________________________________ Date: ___ April 21, 2023_______________________ I Jerocan Song HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Agent. I consent to the obligation to accept service of process on behalf of the applicant in regard to the FCC ID designated above. Agent Company Name : DNS INDUSTRIES (USA) INC Contact Name : Jerocan Song Address : 815 BRAZOS ST AUSTIN TX 78701 Telephone No : (501)413 5158 Email : [email protected] Agent FRN : 0033538547 Signature: _____ _______________________________ Date: __ April 21, 2023_________________________

SHENZHEN DNS INDUSTRIES CO., LTD Attention: Application Examiner Re: Covered List, located at https://www.fcc.gov/supplychain/coveredlist and 47 CFR parts §2.903 and §2.911(d)(5)(ii) of the FCC rules Applicant: SHENZHEN DNS INDUSTRIES CO., LTD FCC ID: ZBCTW602A To Whom It May Concern, SHENZHEN DNS INDUSTRIES CO., LTD (“Applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to 47 CFR part §2.903 of the FCC rules and does not originate directly or indirectly from any company named on the covered list located in the link above or any subsidiary or affiliate thereof. Applicant further certifies that, as of the date of the filing of the application, the Applicant is not identified on the Covered List as an entity producing “covered” equipment and is not a subsidiary or affiliate of any such entity pursuant to 47 CFR part §1.50002 and required by 47 CFR part §2.911(d)(5)(ii) of the FCC rules. I HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Applicant and agree to immediately notify Intertek if there is any change in the status identified above. ______________________________ Yuki Wu Certification Engineer SHENZHEN DNS INDUSTRIES CO., LTD 2023.03.29

Shenzhen DNS Industries Co, Ltd APPENDIX B Shenzhen DNS Industries Co, Ltd [2023/02/20] Federal Communications Commission 445 12 th Street SW Washington, DC 20554 Subject: Limited Agency Agreement Shenzhen DNS Industries Co, Ltd FCC ID: ZBCTW602A To Whom It May Concern: We, Shenzhen DNS Industries Co, Ltd, hereby authorized Intertek Testing Services to act as our Agent for the purpose of preparing application for FCC ID number ZBCTW602A under all applicable parts of the FCC rules and regulations. The effective date of this limited agency agreement is 2023/02/20. The Limited Agency Agreement expires on 2028/12/30, unless sooner terminated or extended by written notice to Intertek Testing Services and the Federal Communications Commission. This is to advise that we are in full compliance with the Anti-Drug Abuse Act. The applicant is not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 U.S.C. 862, and no party to the application is subject to a denial of federal benefits pursuant to that section. If you have any questions or comments, please do not hesitate to contact me. Sincerely, Yuki Wu Certification Engineer

1(2) SHENZHEN DNS INDUSTRIES CO., LTD Attention: Certification reviewer RE: Request for Confidentiality FCC ID: ZBCTW602A To Whom It May Concern: Permanent Confidentiality [Complete this section if permanent confidentiality is requested] Request to withhold permanently from public review certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept permanently confidential: [Select one or more of items below, as appropriate] Schematics Block Diagrams Operational Description Tune-up Procedure Parts List Internal Photos (see note) Users Manual (see note) Note 1: Internal Photos may be held confidential 1) if the circuit board or internal components are not accessible to users. For example, it is acceptable if the circuit board is enclosed in epoxy. 2) Also, it is acceptable if the device is not accessible to the public, for example, a device mounted on the top of a large tower (or in a fenced enclosure) such that it is only serviceable by professional designated technicians under a Non-Disclosure Agreement (NDA). All sales for these devices must be under a NDA restricting the disclosure of the propriety information, including internal photos. Users Manual may be held confidential only when the manual contains proprietary technical information intended for professional technicians obligated under a NDA. All sales and distribution of the user’s manual must be under a NDA that restricts the disclosure of the information. In the application cover letter requesting permanent confidentiality the following additional description and the NDA exhibit is required: 1. Describe in detail how internal photos and/or users manual information are controlled to prevent them from becoming public or disclosed to unauthorized persons. 2. Describe how public access is restricted for products serviceable by professional designated technicians. 3. A statement that all sales of the non-consumer device will be under a NDA to include third party sales and that the final user of the device is subject to the NDA. 4. Provide an example of the NDA between the grantee and a purchaser. The request for confidentiality must Note 2: For scanning receiver, the schematics, block diagrams, operational description, tune-up procedure, parts list and internal photos are always held permanently confidential. Short-term Confidentiality [Complete this section if short-term confidentiality is requested] Request to withhold from public review for a period of 180 days from the date of the Grant of Equipment Authorization and prior to marketing, certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept short-term confidential for a period above from the date of the grant [Select one or more of items below that are not selected in the list above, as appropriate] Schematics Block diagrams Operational Description Tune-up Procedure 2(2) Parts List Test Setup Photos External Photos Internal Photos Users Manual Rationale for request for confidentiality: We have invested considerable time and materials in research and development to produce the referenced product. Permanent confidentiality: Disclosure of the permanently confidential portions of this application to competitors would not only give them significant competitive advantages in developing similar products, but would also disclose successful implementation of unpublished, leading edge technology developed by us. Short-term confidentiality: Disclosure of the short-term confidential portions of this application during the period of importation and/or distribution would reveal key aspects of proprietary technology to competitors and diminish the value of our investment in research and development. If you have questions or need further information, please contact the undersigned. Sincerely, _________________ Yuki Wu Certification Engineer 2023.03.28

FCC ID: ZBCTW602A Photo of EUT

Model No. TW-602A FCC ID: ZBCTW602A MADE IN CHINA

FCC ID: ZBCTW602A Photos of EUT Antenna size: 1.6*0.8mm Right_ earbud Right_ earbud Antenna size: 1.6*0.8mm Left_ earbud Left_ earbud Antenna size: 1.6*0.8mm

INTERTEK TESTING SERVICES RF Exposure The equipment under test (EUT) is a True Wireless Earbuds with Bluetooth 5.3 EDR function operating in 2402-2480MHz. The EUT is powered by DC 3.7V rechargeable battery. Once the earbuds are plugged in the charging case, the earbuds automatically shut down, the Bluetooth function will be disabled. For more detail information pls. refer to the user manual. Antenna Type: Integral antenna Modulation Type: GFSK, p/4-DQPSK, 8DPSK Antenna Gain: 1.75dBi Max The nominal radiated output power (e.i.r.p) specified: 0.0dBm (+/-4dB) The nominal conducted output power specified: -1.75 dBm (+/-4dB) According to the KDB 447498: The maximun peak radiated emission for the EUT is 95.5 dBμV/m at 3m in the frequency 2402MHz The EIRP = [(FS*D) ^2 / 30] mW = 0.27dBm which is within the production variation. The minimum peak radiated emission for the EUT is 92.6 dBμV/m at 3m in the frequency 2480MHz The EIRP = [(FS*D) ^2 / 30] mW = -2.63dBm which is within the production variation. The maximun conducted output power specified is 2.25dBm = 1.68 mW The source- based time-averaging conducted output power = 1.68 * Duty factor mW (where Duty Factor≤1) = 1.68 mW The SAR Exclusion Threshold Level: 푃 th (mW) = ERP 20cm * (푑/20cm) 푥 (X= ) = 3060 * (0.5/20) 1.9 mW = 2.72 mW Since the source-based time-averaging conducted output power is well below the SAR low threshold level, per 447498 and §1.1307(b)(3)(i)(A), the EUT is considered to comply with SAR requirement without testing and no evaluation is required. FCC ID: ZBCTW602A

SHENZHEN DNS INDUSTRIES CO., LTD. TEST REPORT SCOPE OF WORK FCC TESTING–TW-602A, 630782, 630685 REPORT NUMBER 230215054SZN-001 ISSUE DATE [REVISED DATE] 20 April 2023 [---------------------] PAGES 24 DOCUMENT CONTROL NUMBER FCC ID 249_C © 2017 INTERTEK Intertek Report No.: 230215054SZN-001 This report is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by the use of this report. Only the Client is authorized to permit copying or distribution of this report and then only in its entirety. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results in this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. Intertek Testing Services Shenzhen Ltd. Longhua Branch 101, 201, Building B, No. 308 Wuhe Avenue, Zhangkengjing Community, GuanHu Subdistrict, LongHua District, ShenZhen, P.R. China Tel: (86 755) 8601 6288 Fax: (86 755) 8601 6751 Version: 01-November-2017 Page: 1 of 24 FCC ID 249_C Test Report SHENZHEN DNS INDUSTRIES CO., LTD. Application For Certification FCC ID: ZBCTW602A True Wireless Earbuds Model: TW-602A, 630782, 630685 Brand Name: DNS, infinitive 2.4GHz Transceiver Report No.: 230215054SZN-001 We hereby certify that the sample of the above item is considered to comply with the requirements of FCC Part 15, Subpart C for Intentional Radiator, mention 47 CFR [10-1-21] Prepared and Checked by: Approved by: Holland Yang Engineer Ryan Chen Project Engineer Date: 20 April 2023 Intertek Report No.: 230215054SZN-001 Version: 01-November-2017 Page: 2 of 24 FCC ID 249_C Test Report MEASUREMENT/TECHNICAL REPORT This report concerns (check one:) Original Grant X Class II Change Equipment Type: DXX - Part 15 Low Power Communication Device Transmitter Deferred grant requested per 47 CFR 0.457(d)(1)(ii)? Yes No X If yes, defer until: date Company Name agrees to notify the Commission by: date of the intended date of announcement of the product so that the grant can be issued on that date. Transition Rules Request per 15.37? Yes No X If no, assumed Part 15, Subpart C for intentional radiator − the new 47 CFR [10-1-21 Edition] provision. Report prepared by: Holland Yang Intertek Testing Services Shenzhen Ltd. Longhua Branch 101, 201, Building B, No. 308 Wuhe Avenue, Zhangkengjing Community, GuanHu Subdistrict, LongHua District, ShenZhen, P.R. China Tel / Fax: 86-755-8614 0680/86-755-8601 6661 Intertek Report No.: 230215054SZN-001 Version: 01-November-2017 Page: 3 of 24 FCC ID 249_C Test Report Table of Contents 1.0 Summary of Test Result ................................................................................................. 4 2.0 General Description ...................................................................................................... 5 2.1 Product Description .................................................................................................... 5 2.2 Related Submittal(s) Grants ......................................................................................... 5 2.3 Test Methodology ...................................................................................................... 5 2.4 Test Facility ............................................................................................................... 5 3.0 System Test Configuration ............................................................................................. 6 3.1 Justification ............................................................................................................... 6 3.2 EUT Exercising Software .............................................................................................. 6 3.3 Special Accessories ..................................................................................................... 6 3.4 Equipment Modification .............................................................................................. 6 3.5 Measurement Uncertainty .......................................................................................... 7 3.6 Support Equipment List and Description ........................................................................ 7 4.0 Emission Results ........................................................................................................... 8 4.1 Radiated Test Results .................................................................................................. 8 4.1.1 Field Strength Calculation ......................................................................................... 8 4.1.2 Radiated Emission Configuration Photograph .............................................................. 9 4.1.3 Radiated Emissions .................................................................................................. 9 4.1.4 Transmitter Spurious Emissions ............................................................................... 12 5.0 Equipment Photographs .............................................................................................. 16 6.0 Product Labelling ........................................................................................................ 16 7.0 Technical Specifications ............................................................................................... 16 8.0 Instruction Manual ..................................................................................................... 16 9.0 Miscellaneous Information ...............................................…

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FCC ID: ZBCTW602A RADIATED EMISSION TEST SET-UP Front View (30MHz to 1GHz) Back View (30MHz to 1GHz) The EUT is placed at the center of turntable Front View (Above 1GHz) Back View(Above 1GHz) The EUT is placed at the center of turntable