2AJVKKH133MICWireless Mic

TCBCALLpágina1 FileFCCID:2AJVKKH133MIC PleaseuploadanexhibitthatexplainshowdoestheTCBverifythenewagentinformation: 1-IstheaddressoftheagentavalidphysicalUSmailingaddress(notaUSpostofficebox,notavirtualmailbox,notP.O.Boxes,notavacantlot,notapublicbuilding, etc.) ○Wehavecheckediftheaddressexistsinarealandpotentialbuilding(Googlemaps)+officialUSregister,afterthisverificationandtheevidencebelowwecan guaranteethefollowing: notaUSpostofficebox notavirtualmailbox notP.O.Boxes notavacantlot notapublicbuilding(note) ►WecheckedtheFCCFRNSearchbasedontheinformationprovidedbythegrantee. Ontheofficialregisterfrom: Ingoogle: TCBCALLpágina2 Bankinformation TCBCALLpágina3 ►CONCLUSIONbyTCB:TheASOPdefinedandprovidedbygranteeisVALIDandconfirmed.Thereforetheexhibit"C5266091_X23_Ed1_US_Agent_Letter新" includedinthefileisok. 2-IstheagentphysicallylocatedatthatvalidUSaddresssuchthattheagentcanbelegallyservedatthataddress? Yes,checkabove 3-Hasthelistedagentclearlyagreedinwritingtoserveastheagentforthegranteeatthataddress? Yes,itisincludedintheexhibit"C5266091_X23_Ed1_US_Agent_Letter新" >

1/1 Foto Electric Supply Co., INC. US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: Foto Electric Supply Co., INC. FRN: 0025902875 Contact Name: Jared Melnicoff Address: 1 Rewe St. Brooklyn, New York 11211 United States Telephone No: 212-260-0666 Email: [email protected] Applicant: Company name: Foto Electric Supply Co., INC. Product Description: Grantee code: 2AJVK FCC ID: 2AJVKKH133MIC FRN： 0025902875 Contact Name: Jared Melnicoff Address: 1 Rewe St. Brooklyn, New York 11211 United States Telephone No: 212-260-0666 Wireless Mic Email: [email protected] [Foto Electric Supply Co., INC.] certifies that, as of the date of this filing of the application with the TCB, [Foto Electric Supply Co., INC.] is our designated US agent for service of process for the above referenced FCC ID. [Foto Electric Supply Co., INC.] accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any commission related proceeding involving equipment. [Foto Electric Supply Co., INC.] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 2026/08/11 Applicant’s Name: Jared Melnicoff US Agent’s Name: Jared Melnicoff Title: Director Sourcing Title: Director Sourcing Signature Signature

Attestation Statement. Old Code: C5266091 24 New Code: 00015544 Ed.3 Change reason: FRN is added to the Applicant information section. 1/1 TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Foto Electric Supply Co., INC. Grantee code: 2AJVK FCC ID: 2AJVKKH133MIC FRN: 0025902875 Contact Name: Jared Melnicoff Address: 1 Rewe St. Brooklyn, New York 11211 United States Telephone No: 212-260-0666 Fax No: 212-473-1873 Email: [email protected] i. [Foto Electric Supply Co., INC.] (“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. The applicant must sign this certification. ii. [Foto Electric Supply Co., INC.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. [Foto Electric Supply Co., INC.] (“the applicant”) 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. Date: 08/11/2026 Applicant’s Name: Jared Melnicoff Title: Director Sourcing Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

Foto Electric Supply Co., INC. Code 00018768 Ed. 1 Item 1. The device is able to install software/program installation? ☐ Yes, go to Item 2. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky cybersecurity or anti-virus software. Item 2. Technical Requirements for Kaspersky Cybersecurity Software: # General Requirements (For all Devices) Yes / No or N/A Comments 1 Internet connection for activation and updates (For all Operating Systems) N/A Device Wireless Mic Company name Foto Electric Supply Co., INC. Grantee code 2AJVK FCC ID 2AJVKKH133MIC FRN 0025902875 Contact name Jared Melnicoff Address 1 Rewe St. Brooklyn, New York 11211 United States Telephone number 212-260-0666 E-mail [email protected] Chipset/module information AB56669A5 Operating System (if applicable) N/A Storage Capacity (hard drive or other permanent memory storage, if applicable) N/A 2 # General Requirements (For Windows Devices) Yes / No or N/A Comments 1 Storage: 1500 MB free space on the hard drive N/A 2 Operating System: Microsoft Windows 8, 8.1, 10 & 11 Home / Pro / Enterprise Microsoft Windows 7 Starter / Home Basic & Premium / Professional / Ultimate SP1 or higher N/A 3 Processor: 1 GHz or higher (x86 or x64) N/A 4 Memory (RAM)1 GB (32-bit) or 2 GB (64-bit) N/A 5 Screen Resolution: Minimum resolution of 1024 x 768 N/A # General Requirements (For macOS devices) Yes / No or N/A Comments 1 Operating System macOS® 13 – 14 N/A 2 Memory (RAM)4 GB N/A 3 Storage: 3455 MB free space on the hard drive N/A # General Requirements (For Android Devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: Android™ 10 – 14 N/A 3 Screen Resolution: Minimum resolution of 320 x 480 N/A # General Requirements (for iOS devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: iOS® 17 N/A 3 # General Requirements (For Linux system) Yes / No or N/A Comments 1 Hard drive: 1 GB of free space N/A 2 CPU: Intel Pentium 1 GHz or higher 3 RAM: 1 GB 4 Minimum software requirements: AlmaLinux OS 8 or later; AlterOS 7.5 or later; Astra Linux Common Edition 2.12 or later; CentOS 6.7 or later; Debian GNU/Linux 10.0 or later; EulerOS 2.0 or later; Oracle Linux 7.3 or later ; Red Hat Enterprise Linux 6.7 or later ; Rocky Linux 8.5 or later ; SUSE Linux Enterprise Server 12.5 or later; Ubuntu 12.04 or later ; Uncom OS Home / Business / Education / Enterprise 2.2 or later; ALT Linux Workstaton / Workstation K / Server / Education 8 or later; ROSA Linux Workstation / Server 12 or later ; RED OS 7.3 and later ; After reviewed the technical requirements, is the device capable of supporting the installation of Kaspersky software? ☐ Yes, go to Item 3. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky software Item 3. Connectivity Capabilities: 4 # Physical Interface Purpose Justification 1 1 # Wireless Interface Purpose Justification 1 1 After the review of this items, the device: ☒ Cannot support installation of any cybersecurity or anti-virus software on the covered list. ☐ Potentially can operate with any cybersecurity or anti-virus software on the covered list – additional third- party proof is provided to demonstrate compliance with requirements as of 2.911(d)5(i),(ii) – “Proof of Compliance with Covered List Software Requirements” of this document applies Signature: Name: Jared Melnicoff Date: 2026-08-11 1 The justification field is used to justify why the software cannot be received through that interface. Check the annex for more indications.

Foto Electric Supply Co., INC. 1 Rewe St. Brooklyn, New York 11211 United States Product Similarity Declaration We (Foto Electric Supply Co., INC.) hereby state that all the models are electrical identical including the same hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), The differences are model number and brand name to marketing purpose. Product name: Wireless Mic Model name: KH133BL, KS133BL, CKS133PK FCC ID: 2AJVKKH133MIC Please kindly handle on the project. Signature: Name: Jared Melnicoff Title: Director Sourcing 2026/08/11

C5266091_X10_Ed.1 1/1 Foto Electric Supply Co., INC. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 08/11/2026 Subject: Request for Confidentiality FCC ID: 2AJVKKH133MIC To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality ID Label/Location No No Attestation Statement No No External Photos No Block Diagram Schematics Test Report No No Test Setup Photos No User’s Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Jared Melnicoff Title: Director Sourcing

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Foto Electric Supply Co., INC. Address: 1 Rewe St. Brooklyn, New York 11211 United States Product Name:Wireless Mic Model Number:KH133BL, KS133BL, CKS133PK FCC Identifier: 2AJVKKH133MIC We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Jared Melnicoff Date: 08/11/2026 Title: Director Sourcing Signature of applicant:

FCC ID: 2AJVKKH133MIC External photos FCC ID: 2AJVKKH133MIC FCC ID: 2AJVKKH133MIC FCC ID: 2AJVKKH133MIC

FCC ID: 2AJVKKH133MIC Internal photos FCC ID: 2AJVKKH133MIC FCC ID: 2AJVKKH133MIC RF Chip RF Antenna

Report No.: NTC2607187F01 Dongguan Nore Testing Center Co., Ltd. Address: Room 101, 1101, Building 2, No. 61, Hongmei Section, Wangsha Road, Hongmei Town, Dongguan, Guangdong, People's Republic of China Web: www.ntc-c.com Tel:+86-769-2202 2444 Fax:+86-769-2202 2799 Page 1 of 11 RF EVALUATION TEST REPORT Applicant......................... : Foto Electric Supply Co., INC. Address........................... : 1 Rewe St. Brooklyn, New York 11211 United States Manufacturer.................... : Foto Electric Supply Co., INC. Address.......................... : 1 Rewe St. Brooklyn, New York 11211 United States Factory ......................... : Foto Electric Supply Co., INC. Address ......................... : 1 Rewe St. Brooklyn, New York 11211 United States Product Name.................. : Wireless Mic Brand Name..................... : CHARGEWORX, COBY Model No. ........................ : KH133BL, CKS133BL, CKS133PK (For model differences refer to section 2) FCC ID............................ : 2AJVKKH133MIC Measurement Standard...... : 47 CFR PART 2, Section 2.1093 Receipt Date of Samples.... : July 20, 2026 Date of Tested.................. : July 24, 2026 to July 28, 2026 Date of Report.................. : August 11, 2026 This report shows that above equipment is technically compliant with the requirements of the standards above. All test results in this report apply only to the tested sample(s). Without prior written approval of Dongguan Nore Testing Center Co., Ltd, this report shall not be reproduced except in full. Prepared by Julie Xiao / Project Engineer Approved by Iori Fan / Authorized Signatory Report No.: NTC2607187F01 Page 2 of 11 Table of Contents 1. General Description of EUT ................................................................................................................................ 4 2. Test Facility and Location ................................................................................................................................... 6 3. Applicable Standards and References ................................................................................................................ 7 4. Maximum Permissible Exposure Limit ................................................................................................................ 8 5. RF Exposure Evaluation Results ...................................................................................................................... 11 Report No.: NTC2607187F01 Page 3 of 11 Revision History Report Number Description Issued Date NTC2607187F01 Initial Issue 2026-08-11 Report No.: NTC2607187F01 Page 4 of 11 1. General Description of EUT Product Information Product Name: Wireless Mic Main Model Name: KH133BL Additional Model Name: CKS133BL, CKS133PK Model Difference: These models have the same circuit schematic, construction, PCB Layout and PCB components. Their differences are model name and brand name due to trading purpose. S/N: 2607-3936 Brand Name: CHARGEWORX, COBY Hardware Version: Not stated Software Version: Not stated Rating: DC 3.7V from internal battery DC 5V come from USB port Typical Arrangement: Table-top I/O Port: Refer to the user manual Accessories Information Adapter: N/A Cable: N/A Other: N/A Additional Information Note: According to the model differences and manufacturer’s requirement, all tests were performed on model KH133BL. Remark: All the information above are provided by the manufacturer. More detailed feature of the EUT please refers to the user manual. Report No.: NTC2607187F01 Page 5 of 11 Technical Specification (BLE) Bluetooth Version: V5.3 Frequency Range: 2402-2480MHz Modulation Type: GFSK Number of Channel: 40 (refer to following channel list for details) Channel Space: 2MHz Antenna Type: PCB Antenna Number of Antenna 1 Antenna Gain: 1.68 dBi (Declared by the manufacturer) RF PHY Support: 1Mbps, 2Mbps Note: The EUT supports BLE technology only. Report No.: NTC2607187F01 Page 6 of 11 2. Test Facility and Location Test Site : Dongguan Nore Testing Center Co., Ltd. (Dongguan NTC Co., Ltd.) Accreditations and Authorizations : The Laboratory has been assessed and proved to be in compliance with CNAS/CL01 Listed by CNAS, August 13, 2018 The Certificate Registration Number is L5795. The Certificate is valid until August 13, 2030 The Laboratory has been assessed and proved to be in compliance with ISO17025 Listed by A2LA, November 01, 2017 The Certificate Registration Number is 4429.01 The Certificate is valid until December 31, 2027 Listed by FCC, November 06, 2017 Test Firm Registration Number: 907417 Listed by Industry Canada, June 08, 2017 The Certificate Registration Number. Is 46405-9743A Test Site Location : Room 101, 1101, Building 2, No. 61, Hongmei Section, Wangsha Road, Hongmei Town, Dongguan, Guangdong, People's Republic of China Report No.: NTC2607187F01 Page 7 of 11 3. Applicable Standards and References According to the specifications of the manufacturer, the EUT must comply with the requirements of the following standards: Test Standards: 47 CFR Part 1, 1.1307 47 CFR Part 2, 2.1093 KDB 447498 D04 v01 Report No.: NTC2607187F01 Page 8 of 11 4. Maximum Permissible Exposure Limit According to 47 CFR Part 1, 1.1307, for single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: 47 CFR Part 1, 1.1307 (A) The available maximum time- averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of this section. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A); (B) Or the available maximum time- averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold P th (mW) described in the following formula. This method shall only be used at separa…

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Report No.: NTC2607187FV00 Dongguan Nore Testing Center Co., Ltd. Address: Room 101, 1101, Building 2, No. 61, Hongmei Section, Wangsha Road, Hongmei Town, Dongguan, Guangdong, People's Republic of China Web: www.ntc-c.com Tel:+86-769-2202 2444 Fax:+86-769-2202 2799 Page 1 of 59 FCC RADIO TEST REPORT Applicant.......................... : Foto Electric Supply Co., INC. Address............................ : 1 Rewe St. Brooklyn, New York 11211 United States Manufacturer..................... : Foto Electric Supply Co., INC. Address............................ : 1 Rewe St. Brooklyn, New York 11211 United States Factory............................ : Foto Electric Supply Co., INC. Address........................... : 1 Rewe St. Brooklyn, New York 11211 United States Product Name................... : Wireless Mic Brand Name...................... : CHARGEWORX, COBY Model No. ........................ : KH133BL, CKS133BL, CKS133PK (For model differences refer to section 2) FCC ID............................ : 2AJVKKH133MIC Measurement Standard....... : 47 CFR FCC Part 15, Subpart C (Section 15.247) Receipt Date of Samples..... : July 20, 2026 Date of Tested................... : July 24, 2026 to July 28, 2026 Date of Report................... : August 11, 2026 This report shows that above equipment is technically compliant with the requirements of the standards above. All test results in this report apply only to the tested sample(s). Without prior written approval of Dongguan Nore Testing Center Co., Ltd, this report shall not be reproduced except in full. Prepared by Julie Xiao / Project Engineer Approved by Iori Fan / Authorized Signatory Report No.: NTC2607187FV00 Page 2 of 59 Table of Contents 1. Summary of Test Result ...................................................................................................................................... 4 2. General Description of EUT ................................................................................................................................ 5 3. Test Channels and Modes Detail ........................................................................................................................ 8 4. Configuration of EUT ........................................................................................................................................... 8 5. Modification of EUT ............................................................................................................................................. 8 6. Description of Support Device ............................................................................................................................. 9 7. Test Facility and Location ................................................................................................................................. 10 8. Applicable Standards and References .............................................................................................................. 11 9. Deviations and Abnormalities from Standard Conditions ................................................................................. 11 10. Test Conditions ............................................................................................................................................... 12 11. Measurement Uncertainty ............................................................................................................................... 13 12. Sample Calculations ....................................................................................................................................... 14 13. Test Items and Results ................................................................................................................................... 15 13.1 Conducted Emissions Measurement ............................................................................................................ 15 13.2 Maximum Conducted Output Power Measurement ...................................................................................... 17 13.3 6dB Bandwidth Measurement ....................................................................................................................... 19 13.4 Power Spectral Density Measurement ......................................................................................................... 23 13.5 Band Edge and Conducted Spurious Emissions Measurement ................................................................... 27 13.6 Radiated Spurious Emissions and Restricted Bands Measurement ............................................................ 32 13.7 Antenna Requirement ................................................................................................................................... 58 14. Test Equipment List......................................................................................................................................... 59 Report No.: NTC2607187FV00 Page 3 of 59 Revision History Report Number Description Issued Date NTC2607187FV00 Initial Issue 2026-08-11 Report No.: NTC2607187FV00 Page 4 of 59 1. Summary of Test Result FCC Rules Description of Test Result Remarks §15.207 (a) AC Power Conducted Emission N/A Note 2 --- §15.247(b)(3) Maximum Conducted Output Power PASS --- §15.247(a)(2) 6dB Bandwidth PASS --- §15.247(e) Power Spectral Density PASS --- §15.247(d) Band Edge and Conducted Spurious Emissions PASS --- §15.247(d), §15.209, §15.205 Radiated Spurious Emissions and Restricted Bands PASS --- §15.203 Antenna Requirement PASS --- Note: 1. N/A means not applicable. 2. The Bluetooth does not work when the product is charged. Report No.: NTC2607187FV00 Page 5 of 59 2. General Description of EUT Product Information Product Name: Wireless Mic Main Model Name: KH133BL Additional Model Name: CKS133BL, CKS133PK Model Difference: These models have the same circuit schematic, construction, PCB Layout and PCB components. Their differenc…

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V . S .W . R < 1.4 Polarization Type V ertical & Horizontal Frequenc Range2400 ~ 2500GHz Input Impendence(ohm)50 Efficiency (dB) 6 0.2 % 6 0.2 % Maximum Gain(dBi) 1.6 8(XZ-plane) Gain (dBi)-0.48 (Avg Gain XY-plane) Peak EIRP(dBm)1.2 Tot. Rad. Pwr. (dBm)-1.2 (Input pwr – loss pwr) Product specification Quick Reference Date Antenna module on the system board Ant. Port Input Pwr. (dBm)0 (Typ. BT class 2 output power) Directivity (dBi)1 (a ll direction antenna) Minimum Power (dBm ) -3.83(XZ-plane) Avg. Power (dBm)-0.48(XY-plane) All the technical data and information c ontained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna Gain G ain Table Unit in dBi @2.44GH zXY-planeXZ-planeYZ-plane Efficiency Peak Avg. Peak Avg. Peak Avg. Module Board 1.68 1.35 -0.48 -3.83 1.11 -2.99 Design company:shenzhen HuaSai Electric Technology Co.Ltd. spce:ANT_XZR01 Name: Shenzhen Huasai Yongbang Technology Address: 2nd–4th Floor, Building C, Jiwei Yusheng Industrial Park, Hangcheng Subdistrict, Bao'an District, Shenzhen City, Guangdong Province Return Loss The Environment of Antenna Radiation Pattern 3D radiation pattern diagram XY-planeXZ-planeYZ-plane

FCC ID: 2AJVKKH133MIC Test Photo Radiated emission (Below 30MHz) Radiated emission (30-1000MHz) FCC ID: 2AJVKKH133MIC Radiated emission (above 1000MHz) FCC ID: 2AJVKKH133MIC Conducted Measurement