2AKFED42NBluetooth Headset

210-222524FCC ID: 2AKFED42N

The Art of Utility AB Covered Equipment Certification Attestation Letter 12/14/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2AKFED42N The Art of Utility AB (“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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Signed: Printed name: Johan Wahlback Title: CEO Company Name: The Art of Utility AB Date: 12/14/2023

The Art of Utility AB * the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter 12/14/2023 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2AKFED42N FRN of applicant: 0026055079 Per section 2.911(d)(7) of the FCC rules, The Art of Utility AB (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: DEFUNC USA FCC Registration Number (FRN): 0033751033 Physical U.S. Company Address: 315 N PUENTE ST. SUITE D, BREA, CA 92821 Contact Person: Eric Zi Agent Email Address: [email protected] The above contact person accepts the obligation for service of process. The applicant 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. Applicant Signed: Agent Signed (if different from Applicant): Signed: Signed: Printed name: Johan Wahlback Printed name: Eric Zi Title: CEO Title: President Company Name: The Art of Utility AB Company Name: DEFUNC USA Date: 12/14/2023 Date: 12/14/2023

The Art of Utility AB Covered Equipment Certification Attestation Letter 12/14/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2AKFED42N The Art of Utility AB (“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. Signed: Printed name: Johan Wahlback Title: CEO Company Name: The Art of Utility AB Date: 12/14/2023

DATE : 12/19/2023 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint EST Technology Co., Ltd. Address:Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with The Art of Utility AB Address: Upplandsgatan 7, 111 23, Stockholm, Sweden <Signature> Name：Johan Wahlback Title：CEO Applicant Company：The Art of Utility AB

DATE : 12/19/2023 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AKFED42N Product Name: Bluetooth Headset Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential:  Schematics  Block diagram  Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signature> Name：Johan Wahlback Title：CEO Company：The Art of Utility AB

The Art of Utility AB I, the signer, Johan Wahlback The Model: Defunc TRUE GO SLIM, D4211,D4212, D4213, D4214, D4215, D4216,are the same in hardware aspect. Different models and colors Item Name ：Bluetooth Headset Model Number: Defunc TRUE GO SLIM Additional Model: D4211,D4212, D4213, D4214, D4215, D4216 FCC ID: 2AKFED42N MIC ID:210-222524 <Signature> Signed: Printed name: Johan Wahlback Title: CEO Company Name: The Art of Utility AB Date: 12/14/2023

External Photos M/N: Defunc TRUE GO SLIM Internal Photos M/N: Defunc TRUE GO SLIM External Photos M/N: Defunc TRUE GO SLIM External Photos M/N: Defunc TRUE GO SLIM External Photos M/N: Defunc TRUE GO SLIM External Photos M/N: Defunc TRUE GO SLIM

Internal Photos M/N: Defunc TRUE GO SLIM Internal Photos M/N: Defunc TRUE GO SLIM Internal Photos M/N: Defunc TRUE GO SLIM

FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312087 Page 1 of 3 FCC RF EXPOSURE REPORT The Art of Utility AB Bluetooth Headset Model Number: Defunc TRUE GO SLIM Additional Model: D4211, D4212, D4213, D4214, D4215, D4216 FCC ID: 2AKFED42N Applicant: The Art of Utility AB Address: Hollandargatan 22, 113 59 Stockholm, Sweden Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2312087 Date of Test: Nov. 28~Dec. 12, 2023 Date of Report: Dec. 13, 2023 FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312087 Page 2 of 3 1. Applicable Standards FCC Part 2(Section 2.1093) FCC KDB 447498 D04 Interim General RF Exposure Guidance v01 2. Exposure Evaluation of Portable or Mobile Devices Human exposure to RF emissions from portable devices (47 CFR §2.1093), as defined by the FCC, must be evaluated with respect to the FCC-adopted limits for SAR. Evaluation of mobile devices, as defined by the FCC, may also be performed with respect to SAR limits, but in such cases it is usually simpler and more cost-effective to evaluate compliance with respect to field strength or power density limits. For certain devices that are designed to be used in both mobile and portable configurations similar to those described in 47 CFR §2.1091(d)(4), such as certain desktop phones and wireless modem modules, compliance for mobile configurations is also satisfied when the same device is evaluated for SAR compliance in portable configurations. The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 300 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312087 Page 3 of 3 3. Evaluation Results Left earbud Mode CH Peak output Power (dBm) Antenna Gain (dBi) effective radiated power (dBm) Target power (dBm) Max. Target power (mW) SAR Test Exemption Limit (mW) GFSK 2402 -2.51 2.7 -1.96 -1±1 1.000 2.72 2441 -2.79 2.7 -2.24 -2±1 0.794 2.72 2480 -3.94 2.7 -3.39 -3±1 0.631 2.72 π/4- DQPSK 2402 -0.95 2.7 -0.40 0±1 1.259 2.72 2441 -1.38 2.7 -0.83 0±1 1.259 2.72 2480 -2.41 2.7 -1.86 -1±1 1.000 2.72 8-DPSK 2402 -0.28 2.7 0.27 0±1 1.259 2.72 2441 -1.04 2.7 -0.49 0±1 1.259 2.72 2480 -2.06 2.7 -1.51 -1±1 1.000 2.72 BLE 1M 2402 3.1 2.7 3.65 3±1 2.512 2.72 2440 2.63 2.7 3.18 3±1 2.512 2.72 2480 1.53 2.7 2.08 2±1 1.995 2.72 BLE 2M 2402 3.25 2.7 3.8 3±1 2.512 2.72 2440 2.91 2.7 3.46 3±1 2.512 2.72 2480 1.76 2.7 2.31 2±1 1.995 2.72 Right earbud Mode CH Peak output Power (dBm) Antenna Gain (dBi) effective radiated power （dBm） Target power (dBm) Max. Target power (mW) SAR Test Exemption Limit (mW) GFSK 2402 -2.27 2.7 -1.72 -1±1 1.000 2.72 2441 -2.96 2.7 -2.41 -2±1 0.794 2.72 2480 -3.88 2.7 -3.33 -3±1 0.631 2.72 π/4- DQPSK 2402 -0.99 2.7 -0.44 0±1 1.259 2.72 2441 -1.22 2.7 -0.67 0±1 1.259 2.72 2480 -2.34 2.7 -1.79 -1±1 1.000 2.72 8-DPSK 2402 -0.61 2.7 -0.06 0±1 1.259 2.72 2441 -0.83 2.7 -0.28 0±1 1.259 2.72 2480 -2.05 2.7 -1.50 -1±1 1.000 2.72 BLE 1M 2402 3.36 2.7 3.91 3±1 2.512 2.72 2440 2.88 2.7 3.43 3±1 2.512 2.72 2480 1.66 2.7 2.21 2±1 1.995 2.72 BLE 2M 2402 3.29 2.7 3.84 3±1 2.512 2.72 2440 2.88 2.7 3.43 3±1 2.512 2.72 2480 1.76 2.7 2.31 2±1 1.995 2.72 Note: 1. Limited=3060*(0.5/20)^x, x=-log(60/(3060*√f)). 2. We choose f=2.48GHz (Highest frequency operate at bluetooth) to calculate MPE limit as higher frequency will have lower MPE limits. 3. SAR Test Exclusion Thresholds is 2.72mW for separation distance 5mm. Therefore, SAR test is not required. End of Test Report

FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 1 of 124 FCC PART 15C TEST REPORT FOR CERTIFICATION On Behalf of The Art of Utility AB Bluetooth Headset Model Number: Defunc TRUE GO SLIM Additional Model: D4211, D4212, D4213, D4214, D4215, D4216 FCC ID: 2AKFED42N Applicant : The Art of Utility AB Address: Hollandargatan 22, 113 59 Stockholm, Sweden Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2312085 Date of Test: Nov. 28~Dec. 12, 2023 Date of Report: Dec. 13, 2023 FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 2 of 124 TABLE OF CONTENTS Description Page TEST REPORT VERIFICATION......................................................................................................................... 3 1. GENERAL INFORMATION ................................................................................................................. 5 1.1. Description of Device (EUT) ........................................................................................................... 5 1.2. Antenna Information ........................................................................................................................ 5 1.3. Information of RF Cable .................................................................................................................. 5 2. SUMMARY OF TEST ......................................................................................................................... 6 2.1. Summary of test result ...................................................................................................................... 6 2.2. Test Facilities ................................................................................................................................... 7 2.3. Measurement uncertainty ................................................................................................................. 8 2.4. Assistant equipment used for test ..................................................................................................... 8 2.5. Block Diagram ................................................................................................................................. 8 2.6. Test mode ......................................................................................................................................... 9 2.7. Channel List ................................................................................................................................... 10 2.8. Power Setting of Test Software ...................................................................................................... 10 2.9. Test Equipment ............................................................................................................................... 11 3. MAXIMUM PEAK OUTPUT POWER ................................................................................................. 13 3.1. Limit ............................................................................................................................................... 13 3.2. Test Setup ....................................................................................................................................... 13 3.3. Spectrum Analyzer Setting ............................................................................................................. 13 3.4. Test Procedure ................................................................................................................................ 13 3.5. Test Result ...................................................................................................................................... 13 4. 20 DB BANDWIDTH ....................................................................................................................... 14 4.1. Limit ............................................................................................................................................... 14 4.2. Test Setup ....................................................................................................................................... 14 4.3. Spectrum Analyzer Setting ............................................................................................................. 14 4.4. Test Procedure ................................................................................................................................ 14 4.5. Test Result ...................................................................................................................................... 14 5. CARRIER FREQUENCY SEPARATION .............................................................................................. 15 5.1. Limit ............................................................................................................................................... 15 5.2. Test Setup ....................................................................................................................................... 15 5.3. Spectrum Analyzer Setting ............................................................................................................. 15 5.4. Test Procedure ................................................................................................................................ 15 5.5. Test Result ...................................................................................................................................... 15 6. NUMBER OF HOPPING CHANNEL .................................................................................................. 16 6.1. Limit ............................................................................................................................................... 16 6.2. Test Setup .........................................................................…

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FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 70 of 124 2DH5-Ant1-2402-PASS 2DH5-Ant1-2441-PASS 2DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 71 of 124 3DH5-Ant1-2402-PASS 3DH5-Ant1-2441-PASS 3DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 72 of 124 Right earbud Test Result TestMode Antenna Frequency[MHz] Result[MHz] Limit[MHz] Verdict DH5 Ant1 2402 1.086 ≥0.948 PASS DH5 Ant1 2441 1.002 ≥0.948 PASS DH5 Ant1 2480 0.975 ≥0.948 PASS 2DH5 Ant1 2402 1.167 ≥0.872 PASS 2DH5 Ant1 2441 0.879 ≥0.872 PASS 2DH5 Ant1 2480 0.987 ≥0.872 PASS 3DH5 Ant1 2402 1.011 ≥0.870 PASS 3DH5 Ant1 2441 1.02 ≥0.870 PASS 3DH5 Ant1 2480 0.981 ≥0.870 PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 73 of 124 Test Graphs DH5-Ant1-2402-PASS DH5-Ant1-2441-PASS DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 74 of 124 2DH5-Ant1-2402-PASS 2DH5-Ant1-2441-PASS 2DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 75 of 124 3DH5-Ant1-2402-PASS 3DH5-Ant1-2441-PASS 3DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 76 of 124 Appendix D: Time of occupancy Left earbud Test Result TestMode Antenna Frequency[MHz] BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH1 Ant1 Hop 0.398 320 0.127 ≤0.4 PASS DH3 Ant1 Hop 1.640 160 0.262 ≤0.4 PASS DH5 Ant1 Hop 2.890 106.67 0.308 ≤0.4 PASS 2DH1 Ant1 Hop 0.410 320 0.131 ≤0.4 PASS 2DH3 Ant1 Hop 1.640 160 0.262 ≤0.4 PASS 2DH5 Ant1 Hop 2.890 106.67 0.308 ≤0.4 PASS 3DH1 Ant1 Hop 0.408 320 0.131 ≤0.4 PASS 3DH3 Ant1 Hop 1.640 160 0.262 ≤0.4 PASS 3DH5 Ant1 Hop 2.900 106.67 0.309 ≤0.4 PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 77 of 124 Test Graphs DH1-Ant1-Hop-PASS DH3-Ant1-Hop-PASS DH5-Ant1-Hop-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 78 of 124 2DH1-Ant1-Hop-PASS 2DH3-Ant1-Hop-PASS 2DH5-Ant1-Hop-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 79 of 124 3DH1-Ant1-Hop-PASS 3DH3-Ant1-Hop-PASS 3DH5-Ant1-Hop-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 80 of 124 Right earbud Test Result TestMode Antenna Frequency[MHz] BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH1 Ant1 Hop 0.398 320 0.127 ≤0.4 PASS DH3 Ant1 Hop 1.640 160 0.262 ≤0.4 PASS DH5 Ant1 Hop 2.890 106.67 0.308 ≤0.4 PASS 2DH1 Ant1 Hop 0.408 320 0.131 ≤0.4 PASS 2DH3 Ant1 Hop 1.650 160 0.264 ≤0.4 PASS 2DH5 Ant1 Hop 2.890 106.67 0.308 ≤0.4 PASS 3DH1 Ant1 Hop 0.410 320 0.131 ≤0.4 PASS 3DH3 Ant1 Hop 1.650 160 0.264 ≤0.4 PASS 3DH5 Ant1 Hop 2.890 106.67 0.308 ≤0.4 PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 81 of 124 Test Graphs DH1-Ant1-Hop-PASS DH3-Ant1-Hop-PASS DH5-Ant1-Hop-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 82 of 124 2DH1-Ant1-Hop-PASS 2DH3-Ant1-Hop-PASS 2DH5-Ant1-Hop-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 83 of 124 3DH1-Ant1-Hop-PASS 3DH3-Ant1-Hop-PASS 3DH5-Ant1-Hop-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 84 of 124 Appendix E: Number of hopping channels Left earbud Test Result TestMode Antenna Frequency[MHz] Result[Num] Limit[Num] Verdict DH5 Ant1 Hop 79 ≥15 PASS 2DH5 Ant1 Hop 79 ≥15 PASS 3DH5 Ant1 Hop 79 ≥15 PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 85 of 124 Test Graphs DH5-Ant1-Hop-PASS 2DH5-Ant1-Hop-PASS 3DH5-Ant1-Hop-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 86 of 124 Right earbud Test Result TestMode Antenna Frequency[MHz] Result[Num] Limit[Num] Verdict DH5 Ant1 Hop 79 ≥15 PASS 2DH5 Ant1 Hop 79 ≥15 PASS 3DH5 Ant1 Hop 79 ≥15 PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 87 of 124 Test Graphs DH5-Ant1-Hop-PASS 2DH5-Ant1-Hop-PASS 3DH5-Ant1-Hop-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 88 of 124 Appendix F: Band edge measurements Left earbud Test Result TestMode Antenna ChName Frequency[MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 High Hop_2480 0.64 -50.3 ≤-19.36 PASS 3DH5 Ant1 High Hop_2480 -2.19 -50.28 ≤-22.19 PASS 2DH5 Ant1 High Hop_2480 -2.30 -50.31 ≤-22.3 PASS DH5 Ant1 Low Hop_2402 1.81 -49.98 ≤-18.19 PASS 3DH5 Ant1 Low Hop_2402 -2.83 -49.75 ≤-22.83 PASS 2DH5 Ant1 Low Hop_2402 -0.70 -50.72 ≤-20.7 PASS DH5 Ant1 High 2480 0.93 -50.93 ≤-19.07 PASS 3DH5 Ant1 High 2480 -2.77 -50.33 ≤-22.77 PASS 2DH5 Ant1 High 2480 -2.35 -49.91 ≤-22.35 PASS DH5 Ant1 Low 2402 2.21 -50.07 ≤-17.79 PASS 3DH5 Ant1 Low 2402 -0.13 -48.02 ≤-20.13 PASS 2DH5 Ant1 Low 2402 -0.36 -50.55 ≤-20.36 PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 89 of 124 Test Graphs DH5-Ant1-Hop_2480-PASS 3DH5-Ant1-Hop_2480-PASS 2DH5-Ant1-Hop_2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 90 of 124 DH5-Ant1-Hop_2402-PASS 3DH5-Ant1-Hop_2402-PASS 2DH5-Ant1-Hop_2402-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 91 of 124 DH5-Ant1-2480-PASS 3DH5-Ant1-2480-PASS 2DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 92 of 124 DH5-Ant1-2402-PASS 3DH5-Ant1-2402-PASS 2DH5-Ant1-2402-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 93 of 124 Right earbud Test Result TestMode Antenna ChName Frequency[MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 High Hop_2480 0.83 -49.18 ≤-19.17 PASS 3DH5 Ant1 High Hop_2480 -2.07 -49.69 ≤-22.07 PASS 2DH5 Ant1 High Hop_2480 -3.98 -49.87 ≤-23.98 PASS DH5 Ant1 Low Hop_2402 2.55 -50.26 ≤-17.45 PASS 3DH5 Ant1 Low Hop_2402 -1.21 -50.07 ≤-21.21 PASS 2DH5 Ant1 Low Hop_2402 -0.57 -50.29 ≤-20.57 PASS DH5 Ant1 High 2480 0.88 -50.58 ≤-19.12 PASS 3DH5 Ant1 High 2480 -1.45 -50.06 ≤-21.45 PASS 2DH5 Ant1 Hig…

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FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 97 of 124 DH5-Ant1-2402-PASS 3DH5-Ant1-2402-PASS 2DH5-Ant1-2402-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 98 of 124 Appendix G: Conducted Spurious Emission Left earbud Test Result TestMode Antenna Frequency[MHz] FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 2402 30~26500 2.21 -36.53 ≤-17.79 PASS DH5 Ant1 2441 30~26500 1.77 -38.84 ≤-18.23 PASS DH5 Ant1 2480 30~26500 0.93 -40.5 ≤-19.07 PASS 2DH5 Ant1 2402 30~26500 -0.36 -42.36 ≤-20.36 PASS 2DH5 Ant1 2441 30~26500 -1.06 -43.16 ≤-21.06 PASS 2DH5 Ant1 2480 30~26500 -2.35 -42.85 ≤-22.35 PASS 3DH5 Ant1 2402 30~26500 -0.13 -42.66 ≤-20.13 PASS 3DH5 Ant1 2441 30~26500 -0.82 -42.78 ≤-20.82 PASS 3DH5 Ant1 2480 30~26500 -2.77 -42.82 ≤-22.77 PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 99 of 124 Test Graphs DH5-Ant1-2402-30~26500-PASS DH5-Ant1-2441-30~26500-PASS DH5-Ant1-2480-30~26500-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 100 of 124 2DH5-Ant1-2402-30~26500-PASS 2DH5-Ant1-2441-30~26500-PASS 2DH5-Ant1-2480-30~26500-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 101 of 124 3DH5-Ant1-2402-30~26500-PASS 3DH5-Ant1-2441-30~26500-PASS 3DH5-Ant1-2480-30~26500-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 102 of 124 Right earbud Test Result TestMode Antenna Frequency[MHz] FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 2402 30~26500 3.06 -37.67 ≤-16.94 PASS DH5 Ant1 2441 30~26500 2.39 -40.35 ≤-17.61 PASS DH5 Ant1 2480 30~26500 0.88 -38.08 ≤-19.12 PASS 2DH5 Ant1 2402 30~26500 -0.42 -41.57 ≤-20.42 PASS 2DH5 Ant1 2441 30~26500 -0.84 -41.26 ≤-20.84 PASS 2DH5 Ant1 2480 30~26500 -1.80 -42.43 ≤-21.8 PASS 3DH5 Ant1 2402 30~26500 0.04 -42.3 ≤-19.96 PASS 3DH5 Ant1 2441 30~26500 -0.70 -42.79 ≤-20.7 PASS 3DH5 Ant1 2480 30~26500 -1.45 -42.23 ≤-21.45 PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 103 of 124 Test Graphs DH5-Ant1-2402-30~26500-PASS DH5-Ant1-2441-30~26500-PASS DH5-Ant1-2480-30~26500-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 104 of 124 2DH5-Ant1-2402-30~26500-PASS 2DH5-Ant1-2441-30~26500-PASS 2DH5-Ant1-2480-30~26500-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 105 of 124 3DH5-Ant1-2402-30~26500-PASS 3DH5-Ant1-2441-30~26500-PASS 3DH5-Ant1-2480-30~26500-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 106 of 124 Appendix H: Reference level measurement Left earbud Test Result TestMode Antenna Freq(MHz) Max.Point[MHz] Result[dBm] DH5 Ant1 2402 2401.97 2.21 DH5 Ant1 2441 2441.17 1.77 DH5 Ant1 2480 2479.99 0.93 2DH5 Ant1 2402 2402.00 -0.36 2DH5 Ant1 2441 2441.01 -1.06 2DH5 Ant1 2480 2480.02 -2.35 3DH5 Ant1 2402 2401.99 -0.13 3DH5 Ant1 2441 2441.01 -0.82 3DH5 Ant1 2480 2480.15 -2.77 FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 107 of 124 Test Graphs DH5-Ant1-2402-PASS DH5-Ant1-2441-PASS DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 108 of 124 2DH5-Ant1-2402-PASS 2DH5-Ant1-2441-PASS 2DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 109 of 124 3DH5-Ant1-2402-PASS 3DH5-Ant1-2441-PASS 3DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 110 of 124 Right earbud Test Result TestMode Antenna Freq(MHz) Max.Point[MHz] Result[dBm] DH5 Ant1 2402 2402.01 3.06 DH5 Ant1 2441 2441.00 2.39 DH5 Ant1 2480 2479.84 0.88 2DH5 Ant1 2402 2402.18 -0.42 2DH5 Ant1 2441 2440.99 -0.84 2DH5 Ant1 2480 2480.01 -1.80 3DH5 Ant1 2402 2402.02 0.04 3DH5 Ant1 2441 2441.00 -0.70 3DH5 Ant1 2480 2480.01 -1.45 FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 111 of 124 Test Graphs DH5-Ant1-2402-PASS DH5-Ant1-2441-PASS DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 112 of 124 2DH5-Ant1-2402-PASS 2DH5-Ant1-2441-PASS 2DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 113 of 124 3DH5-Ant1-2402-PASS 3DH5-Ant1-2441-PASS 3DH5-Ant1-2480-PASS FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 114 of 124 14. TEST SETUP PHOTO Conducted Test FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 115 of 124 Radiated Test (Below 1GHz) Radiated Test (Above 1GHz) FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 116 of 124 15. EUT PHOTO External Photos M/N: Defunc TRUE GO SLIM FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 117 of 124 Internal Photos M/N: Defunc TRUE GO SLIM FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 118 of 124 External Photos M/N: Defunc TRUE GO SLIM FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 119 of 124 External Photos M/N: Defunc TRUE GO SLIM FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 120 of 124 External Photos M/N: Defunc TRUE GO SLIM FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 121 of 124 External Photos M/N: Defunc TRUE GO SLIM FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 122 of 124 Internal Photos M/N: Defunc TRUE GO SLIM FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 123 of 124 Internal Photos M/N: Defunc TRUE GO SLIM FCC ID: 2AKFED42N EST Technology Co., Ltd Report No. ESTE-R2312085 Page 124 of 124 Internal Photos M/N: Defunc TRUE GO SLIM End of Test Report

2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 １ Application: WLAN,802.11b/g,Bluetooth,WLAN,etc... Features SMD,highreliability,ultraImpact,Omni-directional... PartnumberInformation RANT1608F245C01/04 (A)(B)(C)(D)(E)(F) ElectricalSpecification DimensionandTerminalConfiguration No.TerminalName 1Feeding/GNG 2GND/Feeding (A)ProductTypeChipAntenna (B)SizeCode 1.6x0.8mm( ± 0.1mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=01/04/05 WorkingFrequencyRange2400~2500MHz Bandwidth120MHz(Min.) PeakGain2.7dBi(Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40~85 °C ResistancetoSolderingHeats 10sec.(@280 °C ) TerminationNi/Au(Leadless) Dimension(mm) L 1.60±0.10 W 0.80 ± 0.10 T 0.80 ± 0.10 咏成國際科技有限公司電話 :13530576606 RAINInternationalTechnologyCo.,Ltd.TEL:13530576606 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ２ 1 EvaluationBoardReference 长条板Layout建议参考如下： Toplayer: Bottomlayer: 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ３ 异形Layout建议参考如下： Toplayer: Toplayer: 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ４ ElectricalCharacteristics ReturnLoss&Radiation ELECTRICALCHARACTERISTICSS11 RadiationPattern 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ５ ElectricalCharacteristics 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ６ TapingSpecifications ReelandTapingSpecification ReelSpecification 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 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ７ 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°…

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