2BKJT-KA496ASubwoofer Wireless Speaker

HONGKONG YXD TECHNOLOGY LIMITED 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – EquipmentType Company name: HONGKONG YXD TECHNOLOGY LIMITED Address: 12/F, San Tai Building, 137-139 Connaught Road Central, Central and Western District, Hong Kong Island, Hong Kong, China Product Name: Subwoofer Wireless Speaker FCCID: 2BKJT-KA496A Model(s): KA-496-A, HI-502-B 2.911(d)(5)(i) EquipmentType We, [HONGKONG YXD TECHNOLOGY LIMITED] (“the applicant”) certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Tao Lei Date: Aug. 23, 2024 Title: manager Company name: HONGKONG YXD TECHNOLOGY LIMITED Signature: NOTE 1 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

HONGKONG YXD TECHNOLOGY LIMITED 2.911 (d)(5)(ii) Applicant Attestation v1.3 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: HONGKONG YXD TECHNOLOGY LIMITED Address: 12/F, San Tai Building, 137-139 Connaught Road Central, Central and Western District, Hong Kong Island, Hong Kong, China Product Name: Subwoofer Wireless Speaker FCCID: 2BKJT-KA496A Model(s): KA-496-A, HI-502-B 2.911(d)(5)(ii) Applicant filing We, [HONGKONG YXD TECHNOLOGY LIMITED] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 , established pursuant to §1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Tao Lei Date: Aug. 23, 2024 Title: manager Company name: HONGKONG YXD TECHNOLOGY LIMITED Signature: NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

HONGKONG YXD TECHNOLOGY LIMITED 2.911 (d)(7)USA Agentv1.3 Section 2.911(d)(7) USA Agent for Service of Process Company name: HONGKONG YXD TECHNOLOGY LIMITED Address: 12/F, San Tai Building, 137-139 Connaught Road Central, Central and Western District, Hong Kong Island, Hong Kong, China Product Name: Subwoofer Wireless Speaker FCCID: 2BKJT-KA496A Model(s): KA-496-A, HI-502-B 2.911(d)(7) USA Designated Agent for Service of Process We, [HONGKONG YXD TECHNOLOGY LIMITED] (“the applicant”) designate [GSS SERVICE INC] NOTE1 for the purpose of accepting service of process on behalf of the applicant. Applicant consent: We Acknowledge our consent to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address of the designated agent and acknowledge our acceptance of our obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, which ever is later. Agent obligation: We Acknowledge our obligation to accept service of process in the United States for matters related to the applicable equipment at our physical U.S. address and email address for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. USA Agent Company name: GSS SERVICE INC Address: 6547 N Academy Blvd #2266 Colorado Springs Co 80918 USA FCC Registration Number(FRN): 0033402082 Contact Name: Michoux Logan Telephone No: 001-949-2990192 Email: [email protected] Applicant Company name: HONGKONG YXD TECHNOLOGY LIMITED Address:12/F, San Tai Building, 137-139 Connaught Road Central, Central and Western District, Hong Kong Island, Hong Kong, China FCC Registration Number(FRN):0035857226 FCC Grantee Code:2BKJT Contact Name: Tao Lei Telephone No: 19179655376 Email:[email protected] Sign Title Dat NO T of pr Refe https al-se H nature: e: Manager e: Aug. 23, TE 1: An app rocess. erence;Federa s://www.fede ecurity-threa HONGKO 2024 plicant locate al Register doc eralregister.g ats-to-the-com ONG YXD d in the Unite cument 2022-2 gov/documen mmunication D TECHN T ed States ma 28263 publish nts/2023/02/0 s-supply-cha NOLOGY Signature: Title: mana Date: Aug. ay designate hed on 02/06/2 06/2022-282 ain-through-t Y LIMITED 2.911 ger 23, 2024 e itself as the 23 263/protecting the D (d)(7)USA Agen agent for se g-against-na ntv1.3 rvice ation

HONGKONG YXD TECHNOLOGY LIMITED Agent Authorization Company: HONGKONG YXD TECHNOLOGY LIMITED Address: 12/F, San Tai Building, 137-139 Connaught Road Central, Central and Western District, Hong Kong Island, Hong Kong, China Product Name: Subwoofer Wireless Speaker Model Number(s):KA-496-A, HI-502-B Product Description: Subwoofer Wireless Speaker We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: Aug. 23, 2024 Name: Tao Lei Title: manager Company: HONGKONG YXD TECHNOLOGY LIMITED

HONGKONG YXD TECHNOLOGY LIMITED Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Aug. 23, 2024 Subject; Request for Confidentiality FCC ID: 2BKJT-KA496A To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuantto KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Tao Lei Title: manager

HONGKONG YXD TECHNOLOGY LIMITED Model Difference Declaration To Whom It May Concern, We, HONGKONG YXD TECHNOLOGY LIMITED (Subwoofer Wireless Speaker); Trade Mark: N/A; Model Number: KA-496-A, HI-502-B;All model's the function, software and electric circuit are the same, only with product model named different. Test sample model: KA-496-A. Please contact me if you have any question. Signature: Date: Aug. 23, 2024 Name: Tao Lei Title: manager

FCC ID LABEL: Ca. 10mm x 30mm Label Location FCC ID: 2BKJT-KA496A

FCC RF Exposure EUT Description: Subwoofer Wireless Speaker Model No.: KA‐496‐A FCC ID: 2BKJT‐KA496A 1. Limits According to KDB 447498 D01 General RF Exposure Guidance v06 The 1‐g and 10‐g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤50 mm are determined by: [(max power of channel, including tune‐up tolerance, mW)/(min. test separation distance, mm)] ·[√ f(GHz)]≤3.0 for 1‐g SAR and ≤ 7.5 for 10‐g extremity SAR, Where: Result=P/D*√F F= the RF channel transmit frequency in GHz P=Maximum turn‐up power in mw D=Min. test separation distance in mm 2. Test Result of RF Exposure Evaluation Frequency (MHz) Output power (dBm) Tune Up Power (dBm) Max Tune Up power (dBm/mW) Min test separation distance (mm) ResultLimit SAR Test Exclusion 2402 ‐1.52 ‐2±1 ‐1/0.794 5 0.2463.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2408054373‐E, antenna gain= 2.499dBi Per KDB 447498 D01, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine RF Exposure test exclusion. The test exclusion threshold is 0.246 which is<= 3, RF Exposure testing is not required. Note: Exclusion Thresholds Results=[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f (GHz)] f(GHz) is the RF channel transmit frequency in GHz Distance=5mm

2.4G-2.48G 频段板载 PIFA 天线测试报告 Test report of onboard PIFA antenna in 2.4G-2.48G band SPECIFICATIONS Frequency（MHz）2400-2480 PeakGain（dBi）2.499 AverageGain（dBi）＞-4 VSWR＜3.2 Impedance（Ω）50Ω AntennaTypePlannarInvertedF Antennaon board PolarizationLinear 测试环境：中科国技暗室测试系统 Test environment: China Science and technology darkroom test system Z X Y 天线实物及物理尺寸 Antenna physical and physical dimensions 天线无源S 参数 (Antenna passive S-parameters): 驻波比（VSWR）、回波损耗（Return Loss）及史密斯圆图 Standing wave ratio (VSWR), Return Loss (Return Loss) and Smith's circle chart 天线效率及增益 Antenna efficiency and gain Frequency（MHz）Gain（dBi）Effciency（%）AverageGain（dBi）Efficiency（dB） 24001.43359.329%-2.717-2.267 24100.92751.861%-3.416-2.852 24200.82952.112%-3.166-2.831 24300.88149.299%-3.258-3.072 24401.19250.672%-3.144-2.952 24501.68853.067%-2.735-2.752 24602.19459.423%-2.276-2.260 24702.11856.680%-2.438-2.466 24802.49961.727%-2.112-2.095 Average1.52954.908%-2.806-2.616 Peak2.49961.727%-2.112-2.095 2440MHz 2D-Theta Pattern 2440MHz 2D-Phi Pattern 2440MHz 3D-Horizontal Pattern 2440MHz 3D-Vertical Pattern 2440MHz3D-TotalPattern

Page 1 of 48 Report No.: HK2408054373-E FCC Test Report Test Report On Behalf of HONGKONG YXD TECHNOLOGY LIMITED For Subwoofer Wireless Speaker Model No.: KA-496-A, HI-502-B FCC ID: 2BKJT-KA496A Prepared For: HONGKONG YXD TECHNOLOGY LIMITED 12/F, San Tai Building, 137-139 Connaught Road Central, Central and Western District, Hong Kong Island, Hong Kong, China Prepared By: Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Aug. 05, 2024 ~ Aug. 19, 2024 Date of Report: Aug. 19, 2024 Report Number: HK2408054373-E Page 2 of 48 Report No.: HK2408054373-E Test Result Certification Applicant’s Name .................. : HONGKONG YXD TECHNOLOGY LIMITED Address .................................. : 12/F, San Tai Building, 137-139 Connaught Road Central, Central and Western District, Hong Kong Island, Hong Kong, China Manufacturer's Name ........... : HONGKONG YXD TECHNOLOGY LIMITED Address .................................. : 12/F, San Tai Building, 137-139 Connaught Road Central, Central and Western District, Hong Kong Island, Hong Kong, China Product Description Trade Mark ............................. : N/A Product Name ........................... : Subwoofer Wireless Speaker Model and/or Type Reference...: KA-496-A, HI-502-B Standards .............................. : 47 CFR FCC Part 15 Subpart C 15.247 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test .................................... . Date (s) of Performance of Tests .... . Aug. 05, 2024 ~ Aug. 19, 2024 Date of Issue .................................... Aug. 19, 2024 Test Result ........................................ Pass Testing Engineer Len Liao Technical Manager Sliver Wan Authorized Signatory Jason Zhou Page 3 of 48 Report No.: HK2408054373-E Table of Contents Page 1. Summary ............................................................................................................. 5 1.1. Test Standards ............................................................................................................................ 5 1.2. Test Description .......................................................................................................................... 5 1.3. Information of the Test Laboratory ............................................................................................ 6 1.4. Statement of the Measurement Uncertainty ............................................................................. 6 2. General Information ............................................................................................. 7 2.1. Environmental Conditions .......................................................................................................... 7 2.2. General Description of EUT ........................................................................................................ 7 2.3. Description of Test Modes and Test Frequency .......................................................................... 8 2.4. Equipments Used during the Test ............................................................................................... 9 2.5. Related Submittal(s) / Grant (s) ................................................................................................ 10 2.6. Modifications ............................................................................................................................ 10 2.7. Description of Test Setup .......................................................................................................... 10 2.8. Description of Support Units .................................................................................................... 11 3. Test Conditions and Results ................................................................................ 12 3.1. Conducted Emissions Test ........................................................................................................ 12 3.2. Radiated Emissions and Band Edge .......................................................................................... 15 3.3. Maximum Peak Conducted Output Power ............................................................................... 26 3.4. 20dB Bandwidth ....................................................................................................................... 27 3.5. Frequency Separation ............................................................................................................... 30 3.6. Number of Hopping Frequency ................................................................................................ 32 3.7. Time of Occupancy (Dwell Time) ............................................................................................. 34 3.8. Out‐of‐Band Emissions ............................................................................................................. 37 3.9. Pseudorandom Frequency Hopping Sequence ........................................................................ 44 3.10. Antenna Requirement............................................................................................................... 45 4. Test Setup Photos of the EUT ............................................................................. 46 5. Photos of the EUT .............................................................................................. 48 Page 4 of 48 Report No.: HK2408054373-E ** Modified History ** Revision Description Issued Data Remark Revision 1.0 Initial Test Report Re…

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