PIBB14Premium Home Music System

1/1 USAgentforServiceofProcessLETTEROFATTESTATION TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USAgentforServiceofProcess: CompanyName:AudioengineLLC FRN:0021991005 ContactName:MikeYe Address:304ProgressDrive,Sherman,TX75092UnitedStates TelephoneNo:(805)407-8548 Email:[email protected] Applicant: Companyname:AudioengineLLC ProductDescription:PremiumHomeMusicSystem Granteecode:PIB FCCID:PIBB14 ContactName:MikeYe Address:304ProgressDrive,Sherman,TX75092UnitedStates TelephoneNo:(805)407-8548 Email:[email protected] [AudioengineLLC]certifiesthat,asofthedateofthisfilingoftheapplicationwiththeTCB, [AudioengineLLC]isourdesignatedUSagentforserviceofprocessfortheabovereferenced FCCID.[AudioengineLLC]acceptstomaintainanagentfornolessthanoneyearafterthe granteehasterminatedallmarketingandimportationortheconclusionofanycommission relatedproceedinginvolvingequipment.[AudioengineLLC]accepts,asofthedateofthefiling oftheapplication,theobligationofthedesignatedUSagentforserviceofprocessforthe abovereferenceFCCID. TheUSAgentforServiceofProcessisawareofandagreestocomplywiththerequirements outlinedintheFCCEquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause §2.911. TheApplicantisawareofandagreestocomplywiththerequirementsoutlinedintheFCC EquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause§2.911. Date:2023/6/25 Applicant’sName:MikeYeApplicant’sName:MikeYe Title:ProjectManagerTitle:ProjectManager Signature:Signature:

C5266091_X24_Ed.2 1/1 “AttestationStatements” TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 TheCommissionadoptedrulesthatprohibitequipmentauthorizationfor“covered” telecommunicationsequipmentandvideosurveillanceequipmentproducedbyentitiesidentified ontheCommission’sCoveredList 1 ,whichisperiodicallyupdated.SeetheCoveredListformore details.ThisAttestationStatementistoconfirmthatwefollowtheSection2.911(d)(5)(i)-(ii) Applicant Companyname:AudioengineLLC Granteecode:PIB FCCID:PIBB14 ContactName:MikeYe Address:304ProgressDrive,Sherman,TX75092UnitedStates TelephoneNo:(805)407-8548 Email:[email protected] i.AudioengineLLC(“theapplicant”)certifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceiving anequipmentauthorizationpursuanttosection2.903oftheFCCrules.The applicantmustsignthiscertification. ii.AudioengineLLC(“theapplicant”)certifiesthat,asofthedateofthefilingof theapplication,theapplicantisnot(asaspecificallynamedentityoranyof itssubsidiariesoraffiliates)identifiedontheCoveredListasanentity producing“covered”equipment.Theapplicantmustsignthiscertification. AudioengineLLC(“theapplicant”)certifiesthat,asofthedateofthefilingoftheapplication, theapplicantisnotidentifiedontheCoveredListasanentityproducing“covered”equipment. Date:2023/06/25 Applicant’sName:MikeYe Title:ProjectManager Signature 1 TheCommission’sCoveredListispublishedbythePublicSafetyandHomelandSecurityBureauandpostedonthe Commission’swebsite.ThisCoveredList,whichisperiodicallyupdated,identifiesparticularequipment,producedby particularentities,thatconstitutes“covered”equipment.https://www.fcc.gov/supplychain/coveredlist

C5266091_X8_Ed.1 1/1 LetterofAuthorization AudioengineLLC Company:AudioengineLLC Address:304ProgressDrive,Sherman,TX75092UnitedStates ProductName:PremiumHomeMusicSystem ModelNumber:HD5 FCCIdentifier:PIBB14 WeauthorizeLGAITechnologicalCenterS.A.,RondadelaFontdelCarme,s/n, 08193Bellaterra,Spain,toactonourbehalfonallmattersconcerningthe abovenamedequipment. AnyindividualwithinLGAITechnologicalCenterS.A.isauthorizedtoactonour behalfandtakeactionontheapplication. WedeclarethatauthorizeLGAITechnologicalCenterS.A.,RondadelaFontdel Carme,s/n,08193Bellaterra,Spain,isallowedtoforwardallinformation relatedtotheapprovalprojecttotheFederalCommunicationCommissionand todiscussanyissuesconcerningtheapprovalapplication.Anyandallacts carriedoutbyLGAITechnologicalCenterS.A.onourbehalfshallhavethe sameeffectasactsofourown. Name:MikeYeDate:2023/06/25 Title: ProjectManager Signatureofapplicant:

C5266091_X10_Ed.1 1/1 AudioengineLLC Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2 023/06/25 Subject: Request for Confidentiality FCC ID: PIBB1 4 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. Exh ibi tsLon g-Term Con fi den ti al ity Short-Term Con fi den ti al ity ID Label /L ocati onNoNo Attestation StatementNoNo External PhotosNo Bl ock Di agram Sch emati cs Test ReportNoNo Test Setu p PhotosNo User ’s Manu al InternalPhotos Parts List / Tun e Up RF Exposure Info Operati on al Descripti on Cover Letter(s)NoNo SDR Software/ Secu ri ty InfoNo In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of _180_ days from the date of the Grant of Equipment Authorization and prior to marketing. 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 repor ts, 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: Mike Ye Title: Project Manager

AudioengineLLC 304ProgressDrive,Sherman,TX75092United DATE:06/25/2023 AudioengineLLC 304ProgressDrive,Sherman,TX75092UnitedStates Attn:DirectorofCertification AuthoritytoActasAgent Onourbehalf,Iappointbelowcompanyandperson: NameDamonHu PositionManager CompanyNameDongguanDongdianTestingServiceCo.,Ltd. Address17,ZongbuRoad2,SongshanLakeSci&Tech,IndustryPark, DongguanCity,GuangdongProvince,China,523808 Tel/Fax Tel:+86-0769-38826678-850 [email protected] toactasouragentinthepreparationofthisapplicationforequipmentcertification.I certifythatsubmitteddocumentsproperlydescribethedeviceorsystemforwhich equipmentcertificationissought.Ialsocertifythateachunitmanufactured,importedor marketed,asdefinedintheFederalCommunicationsCommission’sregulationswill haveaffixedtoitalabelidenticaltothatsubmittedforapprovalwiththisapplication. ApplicantnameAudioengineLLC Address304ProgressDrive,Sherman,TX75092UnitedStates Yourssincerely, Signatory NameMikeYe PositionProjectManager CompanyNameAudioengineLLC Address304ProgressDrive,Sherman,TX75092UnitedStates Tel/Fax(805)407-8548 [email protected]

Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 1 of 18 Appendix: Photos of the EUT Product Name : Premium Home Music System Model Number : HD5 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 2 of 18 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 3 of 18 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 4 of 18 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 18 of 18 END

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Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 5 of 20 Antenna Antenna connector Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 6 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 7 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 8 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 9 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 10 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 11 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 12 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 13 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 14 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 15 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 16 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 17 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 18 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 19 of 20 Dongguan Dongdian Testing Service Co., Ltd. Case No.: DDT-Q22111812-1E Page 20 of 20 END

Dongguan Dongdian Testing Service Co., Ltd Report No.:DDT-RE22111812-2E04 TRF No.: KDB447498 D01 Ver.1.0 Page 1 of 8 RF EXPOSURE REPORT FOR Issued By: Dongguan Dongdian Testing Service Co., Ltd. Add.: No. 17, Zongbu Road 2, Songshan Lake Sci&Tech, Industry Park, Dongguan City, Guangdong Province, China, 523808 Tel.: +86-0769-38826678, E-mail: [email protected], http://www.dgddt.com Applicant : Audioengine LLC Address : 6500 River Palce Blvd Bldg7,Ste 250 Austin ,TX 78730 Equipment under Test : Premium Home Music System Model No. : HD5 Trade Mark : Audioengine FCC ID : PIBB14 Manufacturer : Dichroic Cat(Shen Zhen) Electronic CO.,LTD. Address : 5F, Bldg. B& RM101, 2~4F, Bldg.C, Zhongxi Industrial Park, Tongfuyu Industrial District, BuChong Community, Shajing, Shenzhen, 518104, China. Report No.: DDT-RE22111812-2E04 Issued Date: May 29, 2023 Dongguan Dongdian Testing Service Co., Ltd Report No.:DDT-RE22111812-2E04 TRF No.: KDB447498 D01 Ver.1.0 Page 2 of 8 Table of Contents Test report declares.......................................................................................................3 1. General Information .................................................................................................................. 5 1.1. Description of equipment ......................................................................................................... 5 1.2. Assess laboratory ..................................................................................................................... 6 2. RF Exposure Evaluation .......................................................................................................... 7 2.1. Requirement .............................................................................................................................. 7 2.2. Calculation method ................................................................................................................... 7 2.3. Estimation result ....................................................................................................................... 8 Dongguan Dongdian Testing Service Co., Ltd Report No.:DDT-RE22111812-2E04 TRF No.: KDB447498 D01 Ver.1.0 Page 3 of 8 Test Report Declare Standard Used: KDB447498 D01 General RF Exposure Guidance v06 We Declare: The equipment described above is assessed by Dongguan Dongdian Testing Service Co., Ltd and in the configuration assessed the equipment complied with the standards specified above. The assessed results are contained in this report and Dongguan Dongdian Testing Service Co., Ltd is assumed of full responsibility for the accuracy and completeness of these assess. After evaluation, our opinion is that the equipment In Accordance with above standard. Report No: DDT-RE22111812-2E04 Date of Receipt: May 10, 2023 Date of Test: May 10, 2023 ~ May 29, 2023 Prepared By: Approved By: ___________________ ______________________ Tiger Mo/Engineer Damon Hu/EMC Manager Note: This report applies to above tested sample only. This report shall not be reproduced in parts without written approval of Dongguan Dongdian Testing Service Co., Ltd. Applicant : Audioengine LLC Address : 6500 River Palce Blvd Bldg7,Ste 250 Austin ,TX 78730 Equipment under Test : Premium Home Music System Model No. : HD5 Trade Mark : Audioengine Manufacturer : Dichroic Cat(Shen Zhen) Electronic CO.,LTD. Address : 5F, Bldg. B& RM101, 2~4F, Bldg.C, Zhongxi Industrial Park, Tongfuyu Industrial District, BuChong Community, Shajing, Shenzhen, 518104, China. E S T T I N N A I G D S G E N R O V D I C E N A C U O G . , G L N T O D D . Dongguan Dongdian Testing Service Co., Ltd Report No.:DDT-RE22111812-2E04 TRF No.: KDB447498 D01 Ver.1.0 Page 4 of 8 Revision History Rev. Revisions Issue Date Revised By --- Initial issue May 29, 2023 Dongguan Dongdian Testing Service Co., Ltd Report No.:DDT-RE22111812-2E04 TRF No.: KDB447498 D01 Ver.1.0 Page 5 of 8 1. General Information 1.1. Description of equipment EUT Name : Premium Home Music System Model Number : HD5 EUT function description : Please reference user manual of this device Power Supply : 100-240V ~ 50/60Hz Radio Technology : Bluetooth V5.0 Operation frequency : 2402 MHz - 2480 MHz Modulation : GFSK, /4-DQPSK, 8DPSK Transmitter rate : 1 Mbps, 2 Mbps, 3 Mbps Antenna Type : Glue stick antenna , maximum PK gain: 2.57 dBi Sample Number : S22111812-06 for conductive S22111812-07 for radiation Dongguan Dongdian Testing Service Co., Ltd Report No.:DDT-RE22111812-2E04 TRF No.: KDB447498 D01 Ver.1.0 Page 6 of 8 1.2. Assess laboratory Dongguan Dongdian Testing Service Co., Ltd. Add.: No. 17, Zongbu Road 2, Songshan Lake Sci&Tech, Industry Park, Dongguan City, Guangdong Province, China, 523808. Tel.: +86-0769-38826678, http://www.dgddt.com, Email: [email protected]. CNAS Accreditation No. L6451; A2LA Accreditation Number: 3870.01 FCC Designation Number: CN1182, Test Firm Registration Number: 540522 Innovation, Science and Economic Development Canada Site Registration Number: 10288A Conformity Assessment Body identifier: CN0048 VCCI facility registration number: C-20087, T-20088, R-20123, R-20155, G-20118 Dongguan Dongdian Testing Service Co., Ltd Report No.:DDT-RE22111812-2E04 TRF No.: KDB447498 D01 Ver.1.0 Page 7 of 8 2. RF Exposure Evaluation 2.1. Requirement Systems operating under the provisions of FCC 47 CFR section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as mobile device whereby a distance of 0.2 m normally can be maintained between the user and the device, and below RF Permissible Exposure limit shall comply with. Limits for General Population/Uncontrolled Exposure 2.2. Calculation method From the peak EUT RF output power, the minimum mobile separation distance, d=0.2 m, as well as the gain of the used antenna, the RF power density can be ob…

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Shenzhen Yishengbang Technology Co., LTD Shenzhen Yishengbang Technology Co., LTD SPECIFICATION FOR APPROVAL The name of the company： Mobos Technology Co., LTD The material code： specifications： Admitted to date： The name of the supplier：Shenzhen Yishengbang Technology Co.，LTD Supplier standard type number： SLK-BS-B2DB-RP-SMA Admit signature For acceptance by the contractor Mobos Technology Co., LTD Rf Engineer quality department Structural engineer The engineer The reviewer approved Shi lian Chen Jie xing Chen Cailiang Liu approved Meicai lin Signed and sealed date 2020-9-8 date instructions： □accept □Conditional acceptance note： The name of the supplier：Shenzhen Yishengbang Technology Co., LTD Supplier address：101, Building C, Shenzhen Qianwan Hard Technology Industrial Park, Bao 'an District, Shenzhen Telephone：13728663272 Shenzhen Yishengbang Technology Co., LTD 2.4G 1. Explanation of Product number : SLK-BS-B 2 D B-RP-S M A 1 2 3 Product Code: (1) Customer: BS: Mobos (2) Antenna Name: B2DB: Black2DB (3) Connector: RP-SMA: RP-SMA 2. Features *Stable and reliable in performances *Compact size *RoHS compliance 3. Applications *2.4G 4. Description Holy bond’s External antenna series are specially designed for 2.4G applications. Based on Holy bond’s proprietary design and processes, this External antenna has excellent stability and sensitivity to consistently provide high signal reception efficiency. Shenzhen Yishengbang Technology Co., LTD 5. Electrical Specifications 5-1 Main technical specifications Frequency Range (MHZ) 2400-2500 Impedance(Ω) 50 Gain(dBi) 2±0.5 VSWR ≦1.92 Admitted Power 10W Polarization Vertical Radiation Omni-directional Connector Type RP-SMA male needle Physical Properties Antenna cover TPEE Operating Temp -20°C~+70°C Storage Temp -20°C~+70°C Shenzhen Yishengbang Technology Co., LTD 5-2.VSWR/S11/Smith 5-3. Antenna Gain/Efficiency/Radiation Pattern of 3D Shenzhen Yishengbang Technology Co., LTD Shenzhen Yishengbang Technology Co., LTD 6. Antenna Dimensions (unit: mm) Shenzhen Yishengbang Technology Co., LTD 7. Packing Packaging examples Customer： Product： Color: Black Customer part number： P/N：SLK-HKC-B2DB DATA：2020.7.15 Remarks: Inner packaging: 50PCS per package Outer packaging: Carton size 380X380X180MM, 2400PCS per box. There may be differences in the size of the cardboard boxes based on the actual order quantity. Create different inner and outer packaging labels according to different customers. Engineering Department： Chen Shilian Quality Department：Wang Xinyuan Approval：

Dongguan Dongdian Testing Service Co., Ltd. Report No.:DDT-RE22111812-2E03 TRF No.: FCC Part 15C BT Ver.1.0 Page 1 of 85 FCC CERTIFICATION TEST REPORT FOR Issued By: Dongguan Dongdian Testing Service Co., Ltd. Add.: No. 17, Zongbu Road 2, Songshan Lake Sci&Tech, Industry Park, Dongguan City, Guangdong Province, China, 523808 Tel.: +86-0769-38826678, E-mail: [email protected], http://www.dgddt.com Applicant : Audioengine LLC Address : 304 Progress Drive, Sherman, TX 75092 United States Equipment under Test : Premium Home Music System Model No. : HD5 Trade Mark : Audioengine FCC ID : PIBB14 Manufacturer : Dichroic Cat(Shen Zhen) Electronic CO.,LTD. Address : 5F, Bldg. B& RM101, 2~4F, Bldg.C, Zhongxi Industrial Park, Tongfuyu Industrial District, BuChong Community, Shajing, Shenzhen, 518104, China. Report No.:DDT-RE22111812-2E03 Issued Date: May 29, 2023 Dongguan Dongdian Testing Service Co., Ltd. Report No.:DDT-RE22111812-2E03 TRF No.: FCC Part 15C BT Ver.1.0 Page 2 of 85 Table of Contents Test report declares.......................................................................................................4 1. Summary of Test Results ............................................................................................... 6 2. General Test Information ............................................................................................... 7 2.1. Description of EUT ......................................................................................................... 7 2.2. Accessories of EUT ........................................................................................................ 8 2.3. Assistant equipment used for test .................................................................................. 8 2.4. Block diagram of EUT configuration for test .................................................................. 8 2.5. Deviations of test standard............................................................................................. 8 2.6. Test environment conditions .......................................................................................... 9 2.7. Test laboratory ............................................................................................................... 9 2.8. Measurement uncertainty ............................................................................................... 9 3. Equipment Used During Test ....................................................................................... 10 4. 20 dB Bandwidth .......................................................................................................... 11 4.1. Block diagram of test setup .......................................................................................... 11 4.2. Limits ............................................................................................................................ 11 4.3. Test procedure ............................................................................................................. 11 4.4. test result ...................................................................................................................... 11 4.5. Test graphs .................................................................................................................. 12 5. Maximum Peak Output Power ..................................................................................... 16 5.1. Block diagram of test setup .......................................................................................... 16 5.2. Limits ............................................................................................................................ 16 5.3. Test procedure ............................................................................................................. 16 5.4. Test Result Peak .......................................................................................................... 17 5.5. Test graphs .................................................................................................................. 17 6. Carrier Frequency Separation ...................................................................................... 21 6.1. Block diagram of test setup .......................................................................................... 21 6.2. Limits ............................................................................................................................ 21 6.3. Test procedure ............................................................................................................. 21 6.4. Test result ..................................................................................................................... 22 6.5. Test graphs .................................................................................................................. 22 7. Dwell Time .................................................................................................................... 24 7.1. Block diagram of test setup .......................................................................................... 24 7.2. Limits ............................................................................................................................ 24 7.3. Test procedure ............................................................................................................. 24 7.4. Test result ..................................................................................................................... 25 7.5. Test graphs .................................................................................................................. 25 Dongguan Dongdian Testing Service Co., Ltd. Report No.:DDT-RE22111812-2E03 TRF No.: FCC Part 15C BT Ver.1.0 Page 3 of 85 8. Number of Hopping Channel ....................................................................................... 32 8.1. Block diagram of test setup ...................…

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Dongguan Dongdian Testing Service Co., Ltd. Report No.:DDT-RE22111812-2E03 TRF No.: FCC Part 15C BT Ver.1.0 Page 83 of 85 15. Test Setup Photograph Dongguan Dongdian Testing Service Co., Ltd. Report No.:DDT-RE22111812-2E03 TRF No.: FCC Part 15C BT Ver.1.0 Page 84 of 85