2BB27-K3C0005BlueTooth Earphone

Foshan Heizuan Trading Co., Ltd 2024-07-11 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: 2BB27-K3C0005) [Foshan Heizuan Trading 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. Sincerely, suihao pang Manager Foshan Heizuan Trading Co., Ltd One of the first floors of Building A, No. 8, Fengxiugang Industrial Zone, Bichong, Huangqi, Nanhai District, Foshan City Foshan Heizuan Trading Co., Ltd 2024-07-11 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: 2BB27-K3C0005) [Foshan Heizuan Trading 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, suihao pang Manager Foshan Heizuan Trading Co., Ltd One of the first floors of Building A, No. 8, Fengxiugang Industrial Zone, Bichong, Huangqi, Nanhai District, Foshan City

AttestationStatements (2023-7-13) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (GC: 2BB27 ) ( Foshan Heizuan Trading Co., Ltd ), the undersigned, hereby authorize (VISHTEC LLC) to act as our designated U.S. agent for service of process,( Foshan Heizuan Trading 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 the equipment. (VISHTEC LLC) accepts the responsibility to act as designated U.S. agent for service of process. Applicant Information： Company name: Foshan Heizuan Trading Co., Ltd Contact Name: suihao pang Address: One of the first floors of Building A, No. 8, Fengxiugang Industrial Zone, Bichong, Huangqi, Nanhai District, Foshan City FRN: 0033999012 Telephone No: 18520203949 Email: [email protected] Signature [suihaopang] U.S. AgentInformation: CompanyName: VISHTECLLC Address: 9888 W BelleviewAve Ste 2142 DenverCO 80123 FRN: 0033407131 ContactName: Alan Graham TelephoneNo:（571）4007350 Email: [email protected] Signature [Alan Graham]

2.4GHz Bluetooth Antenna

RF EXPOSURE EVALUATION EUT Specification EUT BlueTooth Earphone Model Number K3C0005 Serial Model N/A Model Difference N/A FCC ID 2BB27-K3C0005 Antenna gain (Max) 2.78 dBi Operation Frequency 2402-2480MHz Rating DC 5V Classification Per Stipulated Test Standard §15.247(i), §2.1093 Modulation GFSK, π/4-DQPSK Max. output power BR + EDR: 0.05dBm(1.012 mW) Test Requirement: According to §15.247(i) and §1.1307(b)(1), systems operating under the provisions of this 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. Routine SAR evaluation refers to that specifically required by §2.1093, using measurements or computer simulation. When routine SAR evaluation is not required, portable transmitters with output power greater than the applicable low threshold require SAR evaluation to quality for TCB approval. One antenna is available for the EUT. The minimum separation distance is 5mm. BR + EDR: According to KDB 447498, no stand-alone required for BT antenna, and no simultaneous SAR measurement is required. Signature: Shawn Wen Date: 2024-07-06 Transmit Frequency (MHz) Mode Measur ed Power (dBm) Tune up Power (dBm) Max tune up power(dBm) Calculation Result 1-g SAR 2402 π/4-DQPSK 0.05 0±1 1 0.390218 3

SymbolsLWTA Dimensions 1.60±0.200.80±0.200.80±0.200.30±0.10 NumberTerminalName ① INPUT ② NC Dimensions(Unit: mm) w ①② ( Side View) ( Bottom View) ( Top View) A T L Shenzhen HanyangAntenna Design Co. Ltd. 1.Bluetooth 2.Dual-band WLAN 3.ISM and UWB 1.Surfacemountedelementwithasmalldimensionof1.6×0.8×0.8mmmeetfutureminiaturizationtrend. 2.EmbeddedandLTCC(lowtemperatureco-firedceramic)technologyisabletointegratewithsystemdesign aswellasbeatifyingthehousingoffinalproduct. 3.Miniaturization,wideband,highstability,lowESR,andlowtolerance. 4.Dual-bandresonancesinthedominantandharmonicmodesenablesmultibandoperations. 5.Novelground-radiationtechniqueenablesradiationfromboththeantennaandthegroundplane. Shenzhen BaoanDistrict Qianjin2 Road BaoYunda logistics information building 12A10 tel：0755-23069700 Features: Applications: RF chip ANT chipANT pattern PCB ground Mode-2 Mode-1 P/N: HY160808 SRF09 ShenzhenHanyangAntennaDesignCo.Ltd.haspossessionofproprietaryinformationprovidedinthis reportandthisproprietaryinformationshallbekeptinstrictconfidenceandnotdisclosedtoanyperson orfirmwithoutthepriorwrittenconsentofShenzhenHanyangAntennaDesignCo.Ltd. Page1 Layout-1 (3.5mm×6.5mm) ShenzhenHanyangAntennaDesignCo.Ltd.haspossessionofproprietaryinformationprovidedinthis reportandthisproprietaryinformationshallbekeptinstrictconfidenceandnotdisclosedtoanyperson orfirmwithoutthepriorwrittenconsentofShenzhenHanyangAntennaDesignCo.Ltd. Page2 1.5 1 3.5 2.5 0201 footprint (E1) 0201 footprint (E2) 0603 footprint (ANT) RF Input/Output 6.5 0.5 0.5 0.5 1.5 3.5 2.5 0201 footprint (E3) 6.5 Top layer: Bottom layer: 0.5 0.5 RF chip E1 E3 E2 ANT Equivalentcircuit: P/N: HY160808 SRF09 Shenzhen HanyangAntenna Design Co. Ltd. Shenzhen BaoanDistrict Qianjin2 Road BaoYunda logistics information building 12A10 tel：0755-23069700 2.5 0201 footprint 0603 footprint 10 0.5 1.5 0201 footprint 1.5 3 2.5 10 1.5 2 0.5 0201 footprint Layout-2 (1.5mm×10mm) Top layer: Bottom layer: P/N: HY160808 SRF09 Shenzhen HanyangAntenna Design Co. Ltd. Shenzhen BaoanDistrict Qianjin2 Road BaoYunda logistics information building 12A10 tel：0755-23069700 ShenzhenHanyangAntennaDesignCo.Ltd.haspossessionofproprietaryinformationprovidedinthis reportandthisproprietaryinformationshallbekeptinstrictconfidenceandnotdisclosedtoanyperson orfirmwithoutthepriorwrittenconsentofShenzhenHanyangAntennaDesignCo.Ltd. Page3 RF Input/Output 5 2 0201 footprint (E1) 0201 footprint (E2) 0603 footprint (ANT) 7 0.8 5 0201 footprint (E2) 10 0.8 0603 footprint (ANT) 0201 footprint (E1) Layout-3 (5mm×7mm) Layout-4 (5mm×10mm) 1 3 P/N: HY160808 SRF09 Shenzhen HanyangAntenna Design Co. Ltd. Shenzhen BaoanDistrict Qianjin2 Road BaoYunda logistics information building 12A10 tel：0755-23069700 ShenzhenHanyangAntennaDesignCo.Ltd.haspossessionofproprietaryinformationprovidedinthis reportandthisproprietaryinformationshallbekeptinstrictconfidenceandnotdisclosedtoanyperson orfirmwithoutthepriorwrittenconsentofShenzhenHanyangAntennaDesignCo.Ltd. Page4 RF Input/Output RF Input/Output ElectricalCharacteristics: CharacteristicCurves: FeatureSpecification 1 Centralfrequency2.45GHz 2 Bandwidth>150MHz 3 Peak gain2.78 dBi 4 VSWR<2 5 PolarizationLinear 6 AzimuthbeamwidthOmnidirectional 7 Impedance50Ω P/N: HY160808 SRF09 Shenzhen HanyangAntenna Design Co. Ltd. Shenzhen BaoanDistrict Qianjin2 Road BaoYunda logistics information building 12A10 tel：0755-23069700 ShenzhenHanyangAntennaDesignCo.Ltd.haspossessionofproprietaryinformationprovidedinthis reportandthisproprietaryinformationshallbekeptinstrictconfidenceandnotdisclosedtoanyperson orfirmwithoutthepriorwrittenconsentofShenzhenHanyangAntennaDesignCo.Ltd. Page5 RadiationPattern: Y-ZPlane X-ZPlane coordinates： Frequency 2400MHz2450MHz2500MHz Avg.gain-1.92-1.35-1.56 Peakgain1.792.782.66 Efficiency74.5580.2576.98 RadiationPerformance: P/N: HY160808 SRF09 Shenzhen HanyangAntenna Design Co. Ltd. Shenzhen BaoanDistrict Qianjin2 Road BaoYunda logistics information building 12A10 tel：0755-23069700 ShenzhenHanyangAntennaDesignCo.Ltd.haspossessionofproprietaryinformationprovidedinthis reportandthisproprietaryinformationshallbekeptinstrictconfidenceandnotdisclosedtoanyperson orfirmwithoutthepriorwrittenconsentofShenzhenHanyangAntennaDesignCo.Ltd. Page6 Temperature：40±2°C Humidity：90~95%RH Duration：500h Recovery conditions：Room temperature Recovery Time：24h (Class1) or 48h (Class2) Test Temperature Operating Temperature Temperature RelativeHumidity 25°C±5°C -25°C~+125°C 5~40°C 20~70% Notenoughsolder Weak holding forcemay cause bad connection between the chipandPCB. RecommendedSolderingAmounts The optimal solder fillet amounts forre-flowsoldering 天线厚度 以下 The optimal solder fillet amounts for wavesoldering DependabilityTest Too much solder Cracks tend to occur due to large stress. MoistureProof OptimumSolderAmount forReflowSoldering Solderability At least 95% of the terminal electrode is covered by newsolder. Preheating conditions:80 to 120°C;10~30s. Solder Tem p e r at u r e :2 3 5 ±5°CDuration:2 ±0.5s , Solder Tempe r ature:24 5±5°CDu rat ion:2±0.5s P/N: HY160808 SRF09 Shenzhen HanyangAntenna Design Co. Ltd. Shenzhen BaoanDistrict Qianjin2 Road BaoYunda logistics information building 12A10 tel：0755-23069700 ShenzhenHanyangAntennaDesignCo.Ltd.haspossessionofproprietaryinformationprovidedinthis reportandthisproprietaryinformationshallbekeptinstrictconfidenceandnotdisclosedtoanyperson orfirmwithoutthepriorwrittenconsentofShenzhenHanyangAntennaDesignCo.Ltd. Page7 10±1S AppliedForce:5NDuration:10±1S Preheating conditions: up-category temperature, 1h Recovery time:24±1h InitialMeasurement Cycling Times: 5 times, 1 cycle, 4steps: Preheating80to120°C;10~30s.SolderTemperature:235±5°C;Duration:2±0.5s;SolderTemperature:245±5°C Duration:2±0.5s;Preheating100to200°C;10±2min. SolderTemperature:265±5°C;Duration:10±1s Cleanthecapacitorwithsolventandexamineitwitha10X(min.)microscope. RecoveryTime:24±2h Recoverycondition:Roomtemperature Test Board: Al 2 O 3 orPCBWarp…

Text truncated - open the document above for the full version.

TRF No.: 04-E001-0B TRF Originator: GTG TRF Date: 2023-12-13 Web: www.gtggroup.com E-mail: [email protected] Tel.: 86-400 755 8988 CFR 47 FCC PART 15 SUBPART C(DSS) TEST REPORT For BlueTooth Earphone MODEL NUMBER: K3C0005 REPORT NUMBER: E04A24060048F00101 ISSUE DATE: July 5, 2024 FCC ID: 2BB27-K3C0005 Prepared for Foshan Heizuan Trading Co., Ltd One of the first floors of Building A, No. 8, Fengxiugang Industrial Zone, Bichong, Huangqi, Nanhai District, Foshan City Prepared by Guangdong Global Testing Technology Co., Ltd. Room 101-105, 203-210, Building 1, No.2, Keji 8 Road, Songshan Lake Park, Dongguan city, Guangdong, People’s Republic of China, 523808 This report is based on a single evaluation of the submitted sample(s) of the above mentioned Product, it does not imply an assessment of the production of the products. This report shall not be reproduced, except in full, without the written approval of Guangdong Global Testing Technology Co., Ltd. REPORT NO.: E04A24060048F00101 Page 2 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Revision History Rev. Issue Date Revisions Revised By V0 July 5, 2024 Initial Issue REPORT NO.: E04A24060048F00101 Page 3 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Summary of Test Results Test Item Clause Limit/Requirement Result Antenna Requirement N/A FCC Part 15.203/15.247 (c) Pass AC Power Line Conducted Emission ANSI C63.10-2013 Clause 6.2 FCC Part 15.207 Pass Conducted Output Power ANSI C63.10-2013 Clause 7.8.5 FCC Part 15.247 (b)(1) Pass 20 dB Bandwidth ANSI C63.10-2013 Clause 6.9.2 FCC Part 15.247 (a)(1) Pass Carrier Hopping Channel Separation ANSI C63.10-2013 Clause 7.8.2 FCC Part 15.247 (a)(1) Pass Number of Hopping Frequency ANSI C63.10-2013 Clause 7.8.3 FCC Part 15.247 (b)(1) Pass Time of Occupancy (Dwell Time) ANSI C63.10-2013 Clause 7.8.4 FCC Part 15.247 (a)(1) Pass Conducted Bandedge and Spurious Emission ANSI C63.10-2013 Clause 6.10.4 & Clause 7.8.8 FCC Part 15.247(d) Pass Radiated Band edge and Spurious Emission ANSI C63.10-2013 Clause 6.3 & 6.5 & 6.6 FCC Part 15.205/15.209 Pass Duty Cycle ANSI C63.10-2013, Clause 11.6 None; for reporting purposes only. Pass *This test report is only published to and used by the applicant, and it is not for evidence purpose in China. *The measurement result for the sample received is <Pass> according to <CFR 47 FCC PART 15 SUBPART C(DSS)> when <Accuracy Method> decision rule is applied. REPORT NO.: E04A24060048F00101 Page 4 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. CONTENTS 1. ATTESTATION OF TEST RESULTS ..................................................................................... 5 2. TEST METHODOLOGY ......................................................................................................... 6 3. FACILITIES AND ACCREDITATION ..................................................................................... 6 4. CALIBRATION AND UNCERTAINTY ................................................................................... 7 4.1. MEASURING INSTRUMENT CALIBRATION ........................................................... 7 4.2. MEASUREMENT UNCERTAINTY ............................................................................ 7 5. EQUIPMENT UNDER TEST .................................................................................................. 8 5.1. DESCRIPTION OF EUT ........................................................................................... 8 5.2. CHANNEL LIST ........................................................................................................ 8 5.3. MAXIMUM PEAK OUTPUT POWER ........................................................................ 9 5.4. TEST CHANNEL CONFIGURATION ........................................................................ 9 5.5. THE WORSE CASE POWER SETTING PARAMETER ............................................ 9 5.6. DESCRIPTION OF AVAILABLE ANTENNAS ......................................................... 10 5.7. SUPPORT UNITS FOR SYSTEM TEST ................................................................. 10 5.8. SETUP DIAGRAM .................................................................................................. 10 6. MEASURING EQUIPMENT AND SOFTWARE USED......................................................... 12 7. ANTENNA PORT TEST RESULTS ..................................................................................... 14 7.1. Conducted Output Power ........................................................................................ 14 7.2. 20 dB Bandwidth ..................................................................................................... 15 7.3. Carrier Hopping Channel Separation ...................................................................... 16 7.4. Number of Hopping Frequency ............................................................................... 18 7.5. Time of Occupancy (Dwell Time) ............................................................................ 20 7.6. Conducted Bandedge and Spurious Emission ........................................................ 22 7.7. Duty Cycle .............................................................................................................. 24 8. RADIATED TEST RESULTS ............................................................................................... 25 8.1. Radiated Band edge and Spurious Emission .......................................................... 31 9. ANTENNA REQUIREMENT ................................................................................................ 43 10. AC POWER LINE CONDUCTED EMISSION ......................................................... 44 11. TEST DATA - Appendix A ..................................................................................... 47 APPENDIX: PHOTOGRAPHS OF TEST CONFIGURATION ..................................................... 89 APPENDIX: PHOTOGRAPHS OF THE EUT ..................…

Text truncated - open the document above for the full version.

REPORT NO.: E04A24060048F00101 Page 81 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Band Edge(Hopping) NVNT 2-DH5 2480MHz Ant1 Hopping Ref Band Edge(Hopping) NVNT 2-DH5 2480MHz Ant1 Hopping Emission REPORT NO.: E04A24060048F00101 Page 82 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Conducted RF Spurious Emission Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT 1-DH5 2402 Ant1 -36.15 -20 Pass NVNT 1-DH5 2441 Ant1 -33.63 -20 Pass NVNT 1-DH5 2480 Ant1 -28.88 -20 Pass NVNT 2-DH5 2402 Ant1 -35.27 -20 Pass NVNT 2-DH5 2441 Ant1 -32.52 -20 Pass NVNT 2-DH5 2480 Ant1 -28.14 -20 Pass REPORT NO.: E04A24060048F00101 Page 83 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Test Graphs Tx. Spurious NVNT 1-DH5 2402MHz Ant1 Ref Tx. Spurious NVNT 1-DH5 2402MHz Ant1 Emission REPORT NO.: E04A24060048F00101 Page 84 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Tx. Spurious NVNT 1-DH5 2441MHz Ant1 Ref Tx. Spurious NVNT 1-DH5 2441MHz Ant1 Emission REPORT NO.: E04A24060048F00101 Page 85 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Tx. Spurious NVNT 1-DH5 2480MHz Ant1 Ref Tx. Spurious NVNT 1-DH5 2480MHz Ant1 Emission REPORT NO.: E04A24060048F00101 Page 86 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Tx. Spurious NVNT 2-DH5 2402MHz Ant1 Ref Tx. Spurious NVNT 2-DH5 2402MHz Ant1 Emission REPORT NO.: E04A24060048F00101 Page 87 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Tx. Spurious NVNT 2-DH5 2441MHz Ant1 Ref Tx. Spurious NVNT 2-DH5 2441MHz Ant1 Emission REPORT NO.: E04A24060048F00101 Page 88 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. Tx. Spurious NVNT 2-DH5 2480MHz Ant1 Ref Tx. Spurious NVNT 2-DH5 2480MHz Ant1 Emission REPORT NO.: E04A24060048F00101 Page 89 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. APPENDIX: PHOTOGRAPHS OF TEST CONFIGURATION AC Power Line Conducted Emission Radiated Band edge and Spurious Emission REPORT NO.: E04A24060048F00101 Page 90 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 91 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 92 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. APPENDIX: PHOTOGRAPHS OF THE EUT REPORT NO.: E04A24060048F00101 Page 93 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 94 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 95 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 96 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 97 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 98 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 99 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. 2.4GHz Bluetooth Antenna REPORT NO.: E04A24060048F00101 Page 100 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 101 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. REPORT NO.: E04A24060048F00101 Page 102 of 102 TRF No.: 04-E001-0B Global Testing , Great Quality. END OF REPORT

AC Power Line Conducted Emission Radiated Band edge and Spurious Emission