2BLP4-K100Bluetooth headphones

Shenzhen Yikexin Electronics Co., Ltd.

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Application Details

Equipment Class: DSS - Part 15 Spread Spectrum Transmitter
Date of Grant: Aug 31, 2026
Application Purpose: Original Equipment
Equipment Note: Bluetooth headphones
Frequency Range: 2402.00000000 - 2480.00000000
Company: Shenzhen Yikexin Electronics Co., Ltd.
Country: China

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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

Shenzhen Yikexin Electronics Co., Ltd. August 12, 2026 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-K100) [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, (Applicant signature) (Wenyu Huang) (General Manager) (Shenzhen Yikexin Electronics Co., Ltd.) Shenzhen Yikexin Electronics Co., Ltd. August 12, 2026 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-K100) [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, (Applicant signature) (Wenyu Huang) (General Manager) (Shenzhen Yikexin Electronics Co., Ltd.)

Attestation Statements

1/1 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: HOPEK CORPORATION INC FRN: 0034562900 Contact Name: Yangyang Xu Address: 16755 Coyote Bush Dr Unit 84, San Diego, CA 92127 United States Telephone No: 561-875-9826 Email: [email protected] Applicant: Company name: Shenzhen Yikexin Electronics Co., Ltd. Grantee Code: 2BLP4 FCC ID: 2BLP4-K100 FRN: 0036135119 Contact Name: Wenyu Huang Address: 4th Floor, Building 8, Huike Industrial Park, No. 1 Gongye 2nd Road, ShilongCommunity, Shiyan Street, Bao’an District, Shenzhen, China Telephone No: 86-18688978867 Fax No: / Email: [email protected] Shenzhen Yikexin Electronics Co., Ltd. certifies that, as of the date of this filing of the application with the TCB, [HOPEK CORPORATION INC] is our designated US agent for service of process for the above referenced FCC ID. Shenzhen Yikexin Electronics Co., Ltd. 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. [HOPEK CORPORATION 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: 2026-08-282 Applicant’s Name: Wenyu Huang US Agent’s Name: Yangyang Xu Title: General Manager Title: Manager Signature: Signature:

Cover Letter(s)

Shenzhen Yikexin Electronics Co., Ltd. August 12, 2026 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Bluetooth headphones / K100/ FCC ID: 2BLP4-K100) 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, Tune up) required to be submitted with this application be permanently withheld from public review. The above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, (Applicant signature) (Wenyu Huang) (General Manager) (Shenzhen Yikexin Electronics Co., Ltd.)

Cover Letter(s)

Shenzhen Yikexin Electronics Co., Ltd. August 12, 2026 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, (Applicant signature) (Wenyu Huang) (General Manager) (Shenzhen Yikexin Electronics Co., Ltd.)

External Photos

Page 1 of 8 Report No.: psi2607208-C01-R02 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-K100 Page 2 of 8 Report No.: psi2607208-C01-R02 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.: psi2607208-C01-R02 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.: psi2607208-C01-R02 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.: psi2607208-C01-R02 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.: psi2607208-C01-R02 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.: psi2607208-C01-R02 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.: psi2607208-C01-R02 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: 0.4cm Label and Location W FCC ID: 2BLP4-K100 Model No.: K100 L W L

Internal Photos

Page 1 of 6 Report No.: psi2607208-C01-R02 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-K100 BT ANT Page 2 of 6 Report No.: psi2607208-C01-R02 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 6 Report No.: psi2607208-C01-R02 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 6 Report No.: psi2607208-C01-R02 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 6 Report No.: psi2607208-C01-R02 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 6 Report No.: psi2607208-C01-R02 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------ BT ANT

RF Exposure Info

Report No.: psi2607208-C01-R02 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-K100 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 According to 47 CFR § 2.1093, a portable device is defined as a transmitting device designed to be used so that the radiating structure(s) of the device is/are within 20 centimeters of the body of the user. This device is classified as a portable device and is subject to SAR evaluation requirements unless it meets the exclusion thresholds. EDR: Worse case output power is as below: [2402MHz: 0.41dBm] Maximum output power is 0.41dBm (1.10 mW). (1.10 mW /5mm)·[√2.402(GHz)]= 0.34 <3.0 for 1-g SAR. Then SAR evaluation is not required.

Test Report

2.4GHz2012 Chip Antenna:RANT2012F245X5 Dimension(mm) L2.05+-0.15 W1.20+-0.15 T0. 85+-0.10 No.TerminalName 1Feeding/GNG 2GND Application: WLAN,802.11b/g,Bluetooth,WLAN,etc ... Features SMD,high reliability,ultra Impact,Omni-directional... Part numberInformation RANT2012F245X5 (A)(B)(C)(D)(E)(F) (A)ProductTypeChip Antenna (B) Size Code2.0x1.2mm(+-0.2mm) (C) MaterialHigh K material (D) Frequency2.4 ~ 2.5GHz (E) FeedingmodePIFA& SingleFeeding (F) AntennatypeType=5 ElectricalSpecification WorkingFrequencyRange2400~2484MHz Bandwidth84 (Min.) PeakGain1.95 dBi (Typ.) Impedance50 Ohm Returnloss10 dB ( Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40 ~85 °C Resistanceto SolderingHeats 10sec.( @ 280°C) TerminationNi / Au (Leadless) The specificationis definedon EVB. Dimensionand TerminalConfiguration RAINInternationalTechnologyCo., Ltd.TEL:13530576606 2.4GHz2012ChipAntenna:RANT2012F245X5 EvaluationBoardReference PCBDimensionAntennaLayoutReference Unit:mm ElectricalCharacteristics ReturnLoss ReturnLoss&Radiation 1 Frequency(MHz) S11(dB) 2400-10.77 2450-24.81 2484-10.243 Radiation Z Y X 2400MHz2450MHz2500MHz Efficiency70.56%75.25%71.01% PeakGain1.72dBi1.95dBi1.69dBi Directivity2.26dBi2.69dBi2.11dBi 2.4GHz2012ChipAntenna:RANT2012F245X5 TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 20127”5K/Reel 9.0±0.5 60±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTDP PaperType2012 1.50±0.202.30±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.101.57±0.104.0±0.1 2.4GHz2012ChipAntenna:RANT2012F245X5 ReliabilityTable TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°C. Preheatingtime:1~2min. Soldertemperature:260±5°C. Dippingtime:5±0.5s NoVisibleDamage.IEC60384-21/22 4.10 Vibration5g'sfor20min.,12cycleseachof3orientations Note:Use8"X5"PCB.031"thick7securepointson,onelong sideand2securepointsatcornersofoppositesides.Parts mountedwithin2"fromanysecurepoint.Testfrom10-2000 Hz. NoVisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksineachdirectionshallbeappliedalongthethree mutuallyperpendicularaxesofthetestspecimen(18shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4ft/s Waveform:Half-sine NoVisibleDamage.MIL-STD-202 Method213 Humidity Bias 1.Humidity:85%R.H.,Temperature:85±2°C. 2.Time:500±24hours. 3.Measurementat24±2hrsaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 Method106 2.4GHz2012ChipAntenna:RANT2012F245X5 2.4GHz2012ChipAntenna:RANT2012F245X5 _ Board Flex (SMD) 1.Mountingmethod: IR-Reflow.PCBSize(L:100×W:40×T:1.6mm) 2.Applytheloadindirectionofthearrowuntilbendingreaches 2mm. NoVisibleDamage.AEC-Q200 005 AdhesionForceof1.8Kgfor60seconds.NoVisibleDamage Magnificationof20Xor greatermaybeemployed forinspectionofthe mechanicalintegrityofthe devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Anyapplicablemethodusingx10magnification,micrometers, calipers,gauges,contourprojectors,orothermeasuring equipment,capableofdeterminingtheactualspecimen dimensions. Inaccordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 12020/10/15NewDatasheet

Test Report

Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Page 1 of 89 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-K100 On Behalf of Shenzhen Yikexin Electronics Co., Ltd. Bluetooth headphones Model No.: K100 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 : psi2607208-C01-R02 Date of Receipt : August 3, 2026 Date of Test : August 4, 2026- August 10, 2026 Date of Report : August 10, 2026 Version Number : V0 Page 2 of 89 Report No.: psi2607208-C01-R02 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 ....................................................................................................................... 18 4.1. Limit ........................................................................................................................... 18 4.2. Test Procedure ........................................................................................................ 18 4.3. Test Result................................................................................................................ 18 5. Carrier Frequency Separation.................................................................................... 30 5.1. Limit ........................................................................................................................... 30 5.2. Test Procedure ........................................................................................................ 30 5.3. Test Result................................................................................................................ 30 6. Number Of Hopping Channel ..................................................................................... 32 6.1. Limit ........................................................................................................................... 32 6.2. Test Procedure ........................................................................................................ 32 6.3. Test Result................................................................................................................ 32 7. Dwell Time ....................................................................................................................... 34 7.1. Test limit .................................................................................................................... 34 7.2. Test Procedure ........................................................................................................ 34 7.3. Test Result................................................................................................................ 34 8. Out-of-band Emissions ................................................................................................ 44 8.1. Test Limits ................................................................................................................ 44 8.2. Test Procedure ........................................................................................................ 44 8.3. Test Setup ...............................................................…

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Test Setup Photos

Page 1 of 2 Report No.: psi2607208-C01-R02 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-K100 Spurious Radiation Emissions Test (<1G) Spurious Radiation Emissions Test (＞1G) Page 2 of 2 Report No.: psi2607208-C01-R02 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------