2AZEQ-B175Headphone

NOTHING TECHNOLOGY LIMITED Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 23 July 2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing & Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2AZEQ-B175 NOTHING TECHNOLOGY LIMITED certifies that the equipment for which authorization is sought is not equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. NOTHING TECHNOLOGY LIMITED (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a) NOTHING TECHNOLOGY LIMITED certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as specifically named entity or any of its subsidiaries or affiliates) as an entity producing” covered equipment. Sincerely, Printed name: Jathan Liu Title: Manager Company Name: NOTHING TECHNOLOGY LIMITED Signed:

Date: 23 July 2025 NOTHING TECHNOLOGY LIMITED To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 To Whom It May Concern: The NOTHING TECHNOLOGY LIMITED the undersigned, hereby authorizes Mr. Wu Xuewen from Shenzhen BALUN Technology Co., Ltd., to act on the behalf of the NOTHING TECHNOLOGY LIMITED solely in matters relating to the application for an FCC equipment authorization for FCC ID: 2AZEQ-B175 including the signing of documents in connection with this Application. Necessary acts carried out by Shenzhen BALUN Technology Co., Ltd. in connection with the Application shall have the same effect as acts of the NOTHING TECHNOLOGY LIMITED The NOTHING TECHNOLOGY LIMITED also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. Section 862. Yours Sincerely, Jathan Liu

Date: 23 July 2025 NOTHING TECHNOLOGY LIMITED To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 Re: NOTHING TECHNOLOGY LIMITED FCC ID: 2AZEQ-B175 FCC Certification Confidentiality Request Gentlemen: This letter is to comply with 47 CFR 0.457 and 0.459 pertaining to confidentiality material. NOTHING TECHNOLOGY LIMITED requests that the following documents regarding this submission for FCC ID: 2AZEQ-B175 be kept confidential: Exhibit Type File Name Block Diagram Block Diagram.pdf Schematics Schematics.pdf Operational Description Operational Description.pdf Tune-up Tune-up.pdf And below exhibit kept short-term confidential (180 days): External photos External photos.pdf Test setup photos test photo.pdf Internal photos Internal photos.pdf User manual User manual.pdf Those documents contain detailed system and equipment description and related information about the product which NOTHING TECHNOLOGY LIMITEDconsiders to be confidential proprietary, a custom design and, otherwise, not releasable to the general public. Since this design is a basis form which future technological products will evolve, NOTHING TECHNOLOGY LIMITED considers this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give competitors an unfair advantage in the market. Yours Sincerely, Jathan Liu

12 3 4 56 7 8910 1 23 45 6 7 8910 A B C D E F A B C D E F 24211 耳壳内衬件 24211 ARTWORK Martina.zhan CMF 安规移印 24211 ARTWORK SN码镭雕： PVT 22/July/2025 V3.0 Made In China R-R-nOt-B175 R-R-nOt-B175 20.0 mm 5.6 mm 23.0 mm 6.5 mm 0.5 mm 0.5 mm

深圳市丰禾原电子科技有限公司 SUNITECENTERPRISECO.,LTD. 1 ANTENNASPECIFICATION Model： CH-6373N-Ant. Version： V1.0 IssuedDate： 2025.04.15 Testedby： Lite.Mo Checkby： Xun.Li Manufacturer： SunitecEnterpriseCo., LTD. THIS DRAWINGSANDSPECIFICATIONSARE THE PROPERTYOF SUNITEC ENTERPRISECO.,LTD.ANDSHALLNOT BE REPRODUCEDOR USEDAS THE BASISFOR THE MANUFACTUREOR SALEOF APPARATUSOR DEVICESWITHOUTPERMISSION 2 Contents 1. RevisionHistory 2. Introduction 3. ElectricalCharacteristics THIS DRAWINGSANDSPECIFICATIONSARE THE PROPERTYOF SUNITEC ENTERPRISECO.,LTD.ANDSHALLNOT BE REPRODUCEDOR USEDAS THE BASISFOR THE MANUFACTUREOR SALEOF APPARATUSOR DEVICESWITHOUTPERMISSION 3 1. RevisionHistory Rev.NoIssuedDateDescriptionSummary V1.02025.04.15initial release 2. Introduction 2.1 Introductionof Product This productis a Bluetoothantennawith Layouton PCB 2.2 Dimension 3. ElectricalCharacteristics 3.1 Test equipment: EquipmentManufacturerModelNoSerialNo. LastCal.DueDate VECTOR NETWORK ANALYZER AgilentE5071C202 4.10.23202 5.10.22 Antenna Measurement System ETS-Lindgren AMS-8050202 4.10.23202 5.10.22 ETS-Lindgren EMCenter ModularRF Platform 202 4.10.23202 5.10.22 THIS DRAWINGSANDSPECIFICATIONSARE THE PROPERTYOF SUNITEC ENTERPRISECO.,LTD.ANDSHALLNOT BE REPRODUCEDOR USEDAS THE BASISFOR THE MANUFACTUREOR SALEOF APPARATUSOR DEVICESWITHOUTPERMISSION 4 3.2 AntennaS11 parameters 3.3 AntennaTest Settings: 3.4 2D& 3D RadiationPattern: THIS DRAWINGSANDSPECIFICATIONSARE THE PROPERTYOF SUNITEC ENTERPRISECO.,LTD.ANDSHALLNOT BE REPRODUCEDOR USEDAS THE BASISFOR THE MANUFACTUREOR SALEOF APPARATUSOR DEVICESWITHOUTPERMISSION 5 2402 MH z 2441 MH z 2480 MH z 3.5 ElectricalCharacteristics: AntennatypePCB LayoutAntenna WorkingFrequencyRange 2450±50MHz Impedance50 Ω VSWR<2 Max Efficiency(%)73.8 %@2460 MHz Max peak Gain(dBi)3.2 dBi@2460 MHz PolarizationLinear Fre(MHz)Efficiency(d b)Efficiency(%)Gain (dBi) 2400-1.571.42.9 2410-1.471.83.2 2420-1.472.13.1 2430-1.472.62.9 2440-1.472.72.8 2450-1.373.83.0 2460-1.373.83.2 2470-1.373.43.1 2480-1.471.93.1

Report No.: BL-SZ2551124-401(G1) Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 28 Web: www.titcgroup.com Template No.: TRP-FCC 15B&ICES 003 (2025-04-14) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China TEST REPORT Applicant: NOTHING TECHNOLOGY LIMITED Address: Bedford House, 21A John Street, London, United Kingdom WC1N 2BF Equipment Type: Headphone Model Name: B175 Brand Name: cmf by NOTHING FCC ID: 2AZEQ-B175 Test Standard: 47 CFR Part 15 Subpart B ICES-003 (Issue 7, October 15, 2020) ANSI C63.4-2014 Sample Arrival Date: Jun. 07, 2025 Test Date: Jun. 07, 2025 - Jun. 19, 2025 Date of Issue: Sep. 22, 2025 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Tangqi Xiao Checked by: Xiong Chong Approved by: Sunny Zou (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ2551124-401(G1) Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 28 Web: www.titcgroup.com Template No.: TRP-FCC 15B&ICES 003 (2025-04-14) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Revision History Version Issue Date Revisions Content Rev. 01 Aug. 05, 2025 Initial Issue Rev. 02 Sep. 22, 2025 Update the manufacturer information of Battery 1 in Section 2.4 This report replaces BL-SZ2551124-401 which issued by BALUN on Aug. 05, 2025, the original report is invalid. TABLE OF CONTENTS 1 GENERAL INFORMATION ........................................................................................................ 4 1.1 Test Laboratory ................................................................................................................... 4 1.2 Test Location ....................................................................................................................... 4 2 PRODUCT INFORMATION ....................................................................................................... 5 2.1 Applicant Information ........................................................................................................... 5 2.2 Manufacturer Information .................................................................................................... 5 2.3 General Description for Equipment under Test (EUT) ......................................................... 5 2.4 Ancillary Equipment ............................................................................................................. 5 2.5 Technical Information .......................................................................................................... 6 3 SUMMARY OF TEST RESULTS ............................................................................................... 7 3.1 Test Standards .................................................................................................................... 7 3.2 Verdict ................................................................................................................................. 7 3.3 Test Uncertainty .................................................................................................................. 7 4 GENERAL TEST CONFIGURATIONS ...................................................................................... 8 4.1 Test Enclosure List .............................................................................................................. 8 4.2 Test Configurations ............................................................................................................. 8 4.3 Test Setups ......................................................................................................................... 9 5 TEST ITEMS ........................................................................................................................... 11 5.1 Emission Tests .................................................................................................................. 11 ANNEX A TEST RESULTS ......................................................................................................... 16 A.1 Radiated Emission ............................................................................................................ 16 A.2 Conducted Emission, AC Ports ......................................................................................... 24 Report No.: BL-SZ2551124-401(G1) Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 28 Web: www.titcgroup.com Template No.: TRP-FCC 15B&ICES 003 (2025-04-14) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China ANNEX B TEST SETUP PHOTOS ............................................................................................. 27 ANNEX C EUT EXTERNAL PHOTOS ......................................................................................... 27 ANNEX D EUT INTERNAL PHOTOS .......................................................................................... 27 Report No.: BL-SZ2551124-401(G1) Tel: +86-755-66850100 E-mail: [email protected] Page No. 4 / 28 Web: www.titcgroup.com Template No.: TRP-FCC 15B&ICES 003 (2025-04-14) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1 GENERAL INFORMATION 1.1 Test Laboratory Name Shenzhen BALUN Technology Co., Ltd. Address Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Phone Number +86 755 6685 0100 1.2 Test Location Name Shenzhen BALUN Technology Co., Ltd. Location Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1/F, Building B, Ganghongji High-tech Intelligent Industrial Park, No. 1008, Songbai Road, Yangguang Community, Xili Sub-district, Nanshan District, Shenzhen, Guangdong Province, P…

Text truncated - open the document above for the full version.