2BLP4-K20Bluetooth headset

Shenzhen Yikexin Electronics Co., Ltd.

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Application Details

Equipment Class: DSS - Part 15 Spread Spectrum Transmitter
Date of Grant: Jan 04, 2026
Application Purpose: Original Equipment
Equipment Note: Bluetooth headset
Frequency Range: 2402.00000000 - 2480.00000000
Company: Shenzhen Yikexin Electronics Co., Ltd.
Country: China

Documents & Files

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Document Text

Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.

Users Manual

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Attestation Statements

1/1 USAgentforServiceofProcessLETTEROFATTESTATION TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USAgentforServiceofProcess: Companyname:HOPEKCORPORATIONINC FRN:0034562900 ContactName:PeterDavis Address:16755CoyoteBushDrUnit84,SanDiego,CA92127UnitedStates TelephoneNo:561-235-6113 Email:[email protected] Applicant: Companyname:ShenzhenYikexinElectronicsCo.,Ltd. GranteeCode:2BLP4 FCCID:2BLP4-K20 FRN:0036135119 ContactName:WenyuHuang Address:4thFloor,Building8,HuikeIndustrialPark,No.1Gongye2ndRoad, ShilongCommunity,ShiyanStreet,Bao’anDistrict,Shenzhen,China TelephoneNo: 86-18688978867 FaxNo: / Email: [email protected] ShenzhenYikexinElectronicsCo.,Ltd.certifiesthat,asofthedateofthisfilingofthe applicationwiththeTCB,[HOPEKCORPORATIONINC]isourdesignatedUSagentforservice ofprocessfortheabovereferencedFCCID.ShenzhenYikexinElectronicsCo.,Ltd.accepts tomaintainanagentfornolessthanoneyearafterthegranteehasterminatedallmarketing andimportationortheconclusionofanycommissionrelatedproceedinginvolvingequipment. [HOPEKCORPORATIONINC]accepts,asofthedateofthefilingoftheapplication,the obligationofthedesignatedUSagentforserviceofprocessfortheabovereferenceFCCID. TheUSAgentforServiceofProcessisawareofandagreestocomplywiththerequirements outlinedintheFCCEquipmentAuthorizationProgram,ReportandOrderFCC22-84,and clause§2.911. TheApplicantisawareofandagreestocomplywiththerequirementsoutlinedintheFCC EquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause§2.911. Date:2025-12-25 Applicant’sName:WenyuHuangUSAgent’sName:PeterDavis Title:GeneralManagerTitle:Manager Signature:Signature:

Attestation Statements

Shenzhen Yikexin Electronics Co., Ltd. December 25, 2025 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2BLP4-K20 [Shenzhen Yikexin Electronics Co., Ltd.] (“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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, Wenyu Huang Shenzhen Yikexin Electronics Co., Ltd. December 25, 2025 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2BLP4-K20 [Shenzhen Yikexin Electronics Co., Ltd.] (“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. Sincerely, Wenyu Huang

Cover Letter(s)

Shenzhen Yikexin Electronics Co., Ltd.. Difference Description We Shenzhen Yikexin Electronics Co., Ltd.. state: Product name: Bluetooth headset Model(s): K20, K10 All the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), the only difference is the model name. Signature: December 25, 2025 Name: Wenyu Huang Position: General Manager Company Name: Shenzhen Yikexin Electronics Co., Ltd.. Address: 4th Floor, Building 8, Huike Industrial Park, No. 1 Gongye 2nd Road, ShilongCommunity, Shiyan Street, Bao’an District, Shenzhen, China Tel: 86-18688978867 Fax: / Email: [email protected]

Cover Letter(s)

Shenzhen Yikexin Electronics Co., Ltd. 12/25/2025 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR Product Name: Bluetooth headset FCC ID: 2BLP4-K20 Model(s): K20 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (Schematic Diagram, Block Diagram, Operational Description) required to be submitted with this application be permanently withheld from public review. 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 Please contact me if there is any information you may need. Sincerely, Signature: December 25, 2025 Name Wenyu Huang Position General Manager Company Name Shenzhen Yikexin Electronics Co., Ltd. Address 4th Floor, Building 8, Huike Industrial Park, No. 1 Gongye 2nd Road, ShilongCommunity, Shiyan Street, Bao’an District, Shenzhen, China Tel 86-18688978867 Fax / Email [email protected]

Cover Letter(s)

Shenzhen Yikexin Electronics Co., Ltd. 12/25/2025 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen PSI Testing Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). This agreement expires one year from the current date. Sincerely, Signature: December 25, 2025 Name Wenyu Huang Position General Manager Company Name Shenzhen Yikexin Electronics Co., Ltd. Address 4th Floor, Building 8, Huike Industrial Park, No. 1 Gongye 2nd Road, ShilongCommunity, Shiyan Street, Bao’an District, Shenzhen, China Tel 86-18688978867 Fax / Email [email protected]

External Photos

Page 1 of 8 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix II external photos FCC ID: 2BLP4-K20 Page 2 of 8 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 3 of 8 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 4 of 8 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 5 of 8 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 6 of 8 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 7 of 8 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 8 of 8 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China ------End------

ID Label/Location Info

Label and Location Material: Silk-screen Font color: White Size: L: 1cm*W: 0.6cm Label and Location W FCC ID: 2BLP4-K20 Model No.: K20 L

Internal Photos

Page 1 of 5 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix III internal photos FCC ID: 2BLP4-K20 BT ANT Page 2 of 5 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 3 of 5 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China BT ANT Page 4 of 5 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 5 of 5 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China ------End------

RF Exposure Info

Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China RF Exposure evaluation FCC ID: 2BLP4-K20 According to 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 f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison EDR: Worse case output power is as below: [2480MHz: 2.39dBm] Maximum output power is 2.39dBm (1.73 mW). (1.73 mW /5mm)·[√2.480(GHz)]= 0.55 <3.0 for 1-g SAR. Then SAR evaluation is not required.

Test Report

2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ Application: WLAN,802.11b/g,Bluetooth,WLAN, etc ... Features SMD,high reliability,ultra Impact,Omni-directional... Part numberInformation RANT0603F245S5 (A)(B)(C)(D)(E)(F) ElectricalSpecification Dimensionand TerminalConfiguration No.TerminalName 1Feeding/GNG 2GND/Feeding (A)ProductTypeChip Antenna (B) Size Code 1.6 x0.8 mm( ± 0. 1mm) (C) MaterialHigh K material (D) Frequency2.4 ~ 2.5GHz (E) FeedingmodePIFA& SingleFeeding (F) AntennatypeType=5 WorkingFrequencyRange2400~2500MHz Bandwidth120 MHz(Min.) PeakGain2.7 dBi (Typ.) Impedance50 Ohm Returnloss10 dB ( Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature(°C)-40 ~85°C Resistanceto SolderingHeats 10sec.( @ 280°C) TerminationNi / Au (Leadless) Dimension(mm) L 1.60±0. 10 W 0.80±0. 10 T 0. 45±0. 10 咏成國際科技有限公司電話 :13530576606 RAIN InternationalTechnologyCo., Ltd. TEL: 13530576606 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ 1 EvaluationBoardReference PCB DimensionUnit :mm ReturnLoss & Radiation 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ TapingSpecifications Reel and TapingSpecification Reel Specification TYPESIZEABCD 16087”4K/Reel 4.0±0.5 4.0 ±213.5 ±0.5178 ±2 TappingSpecification PackagingTypeABWEFGHTψDP PaperType1608 1.90±0.203.50±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.10 1.50±0.10 4.0±0.1 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ ReliabilityTable Test ItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfillthe electrical specification UserSpec. Thermal Shock 1. Preconditioning: 50 ± 10°C/ 1 hr , then keepfor 24 ± 1 hrs at roomtemp. 2. Initialmeasure:Spec:refer Initialspec. 3. Rapidchangeof temperaturetest: -30°Cto +85°C; 100 cycles; 15 minutesat Lowercategorytemperature; 15 minutesat Uppercategorytemperature. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 107 Temperature Cycling 1. Initialmeasure:Spec:refer Initialspec. 2. 100 Cycles(-30°Cto +85°C), SoakMode=1(2 Cycle/hours). 3. Measurementat 24 ± 2Hoursafter test condition. No VisibleDamage. Fulfillthe electrical specification. JESD22 JA104 High Temperature Exposure 1. Initialmeasure:Spec:refer Initialspec. 2. Unpowered;500hours@ T=+85°C. 3. Measurementat 24 ± 2 hoursafter test. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 108 Low Temperature Storage 1. Initialmeasure:Spec:refer Initialspec. 2. Unpowered:500hours@ T= -30°C. 3. Measurementat 24 ± 2 hoursafter test. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 108 Solderability (SMD BottomSide) Dippingmethod: a. Temperature:235 ±5°C b. Dippingtime:3 ±0.5s The soldershouldcover over 95% of the critical area of bottomside. IEC 60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150 ± 10 °C. Preheatingtime:1~2 min. Soldertemperature:260 ± 5°C. Dippingtime:5 ± 0.5s No VisibleDamage.IEC 60384-21/22 4.10 Vibration5g's for 20 min.,12 cycleseachof 3 orientations Note:Use 8"X5"PCB .031"thick 7 securepointson, one long side and 2 securepointsat cornersof oppositesides.Parts mountedwithin2" from any securepoint.Test from 10-2000 Hz. No VisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksin eachdirectionshall be appliedalongthe three mutuallyperpendicularaxesof the test specimen(18 shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4 ft/s Waveform:Half-sine No VisibleDamage.MIL-STD-202 Method213 Humidity Bias 1. Humidity:85% R.H.,Temperature:85 ± 2 °C. 2. Time:500 ± 24 hours. 3. Measurementat 24 ± 2hrs after test condition. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 Method106 2.4GHz1608 Chip Antenna:RANT 0603 F245 S5 _ Board Flex (SMD) 1. Mountingmethod: IR-Reflow.PCB Size (L:100× W:40× T:1.6mm) 2. Applythe load in directionof the arrowuntil bendingreaches 2 mm. No VisibleDamage.AEC-Q200 005 AdhesionForceof 1.8Kgfor 60 seconds.No VisibleDamage Magnificationof 20X or greatermay be employed for inspectionof the mechanicalintegrityof the devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Any applicablemethodusingx10 magnification,micrometers, calipers,gauges,contourprojectors,or othermeasuring equipment,capableof determiningthe actualspecimen dimensions. In accordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 12019/03/01New Datasheet 22020/02/22Add 2D radiationcharacteristic

Test Report

Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Page 1 of 85 Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China FCC TEST REPORT FCC ID: 2BLP4-K20 On Behalf of Shenzhen Yikexin Electronics Co., Ltd. Bluetooth headset Model No.: K20, K10 Prepared for : Shenzhen Yikexin Electronics Co., Ltd. Address : 4th Floor, Building 8, Huike Industrial Park, No. 1 Gongye 2nd Road, ShilongCommunity, Shiyan Street, Bao’an District, Shenzhen, China Prepared By : Shenzhen PSI Testing Co., Ltd. Address : 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Report Number : psi2512107-C01-R07 Date of Receipt : December 15, 2025 Date of Test : December 15, 2025- December 23, 2025 Date of Report : December 23, 2025 Version Number : V0 Page 2 of 85 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China TABLE OF CONTENTS Description Page 1. Summary Of Standards And Results............................................................................................ 6 1.1. Description of Standards and Results ..................................................................................... 6 2. General Information........................................................................................................................ 7 2.1. Description of Device (EUT) .................................................................................................... 7 2.2. Accessories of Device (EUT) .................................................................................................. 8 2.3. Tested Supporting System Details .......................................................................................... 8 2.4. Block Diagram of connection between EUT and simulators ................................................... 8 2.5. Test Mode Description ............................................................................................................. 8 2.6. Software test version and power setting information .............................................................. 9 2.7. Test Conditions ........................................................................................................................ 9 2.8. Test Facility .............................................................................................................................. 9 2.9. Measurement Uncertainty ..................................................................................................... 10 2.10. Test Equipment List ............................................................................................................... 11 3. Maximum Peak Output Power ..................................................................................................... 12 3.1. Limit ....................................................................................................................................... 12 3.2. Test Procedure ...................................................................................................................... 12 3.3. Test Setup .............................................................................................................................. 12 3.4. Test Result ............................................................................................................................. 12 4. Bandwidth ..................................................................................................................................... 13 4.1. Limit ....................................................................................................................................... 13 4.2. Test Procedure ...................................................................................................................... 13 4.3. Test Result ............................................................................................................................. 13 5. Carrier Frequency Separation ..................................................................................................... 25 5.1. Limit ....................................................................................................................................... 25 5.2. Test Procedure ...................................................................................................................... 25 5.3. Test Result ............................................................................................................................. 25 6. Number Of Hopping Channel ...................................................................................................... 27 6.1. Limit ....................................................................................................................................... 27 6.2. Test Procedure ...................................................................................................................... 27 6.3. Test Result ............................................................................................................................. 27 7. Dwell Time ..................................................................................................................................... 29 7.1. Test limit ................................................................................................................................. 29 7.2. Test Procedure ...................................................................................................................... 29 7.3. Test Result .......................................................................…

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Test Setup Photos

Page 1 of 2 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix I Test Setup Photo FCC ID: 2BLP4-K20 Spurious Radiation Emissions Test (<1G) Spurious Radiation Emissions Test (＞1G) Page 2 of 2 Report No.: psi2512107-C01-R07 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Conducted emission Test ------End------