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2AKFE-D4551Bluetooth Wireless Earphones(True Wireless Type)

The Art of Utility AB
Bluetooth Wireless Earphones(True Wireless Type) - FCC ID 2AKFE-D4551 - The Art of Utility AB
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Application Details

Equipment Class
DSS - Part 15 Spread Spectrum Transmitter
Date of Grant
Dec 29, 2025
Application Purpose
Original Equipment
Equipment Note
Bluetooth Wireless Earphones(True Wireless Type)
Frequency Range
2402.00000000 - 2480.00000000
Company
The Art of Utility AB
Country
Sweden

Documents & Files

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Users Manual

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Attestation Statements

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Cover Letter(s)

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External Photos

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ID Label/Location Info

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Internal Photos

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RF Exposure Info

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Test Report

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Test Setup Photos

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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

FCC WARING equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communica- tions. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC RF Exposure Warning Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment can be used in portable exposure conditions. 1011 NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This FCC ID:2AKFE-D4551 White

Attestation Statements

The Art of Utility AB Hollandargatan 22, 113 59 Stockholm, Sweden Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Oct. 13, 2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2AKFE-D4551 FRN: 0026055079 [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. Sincerely, (Applicant signature) (Johan Wahlback)

Attestation Statements

The Art of Utility AB Hollandargatan 22, 113 59 Stockholm, Sweden Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Oct. 13, 2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2AKFE-D4551 FRN: 0026055079 [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. Sincerely, (Applicant signature) (Johan Wahlback)

Attestation Statements

The Art of Utility AB Hollandargatan 22, 113 59 Stockholm, Sweden 1 | P a g e Attestation Statements To: Federal Communications Commission Date: Oct. 13, 2025 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Attestation of Compliance with FCC Covered List Software Requirements FCC ID: 2AKFE-D4551 Product Name: Bluetooth Wireless Earphones(True Wireless Type) This letter serves as an attestation that the equipment identified above ☐ is / ☒ is not (select one) "covered" software as defined under the Federal Communications Commission (FCC) Covered List requirements, as outlined in FCC 22-84 and KDB 986446. Specifically, the undersigned certifies that the equipment for which authorization is sought: 1. Does not contain cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors, assignees, parents, subsidiaries, affiliates, or any entity that has rebranded or relabeled software produced by the aforementioned entities. 2. Does not have the capability to store, run, or deliver any software identified on the FCC Covered List, including but not limited to cybersecurity and anti-virus software. To support this attestation, the appendix evaluation documentation has been prepared and is included in the certification filing. This attestation is based on a thorough evaluation of the device's design, functionality, and software environment. The undersigned affirms that the information provided is accurate and complete to the best of their knowledge. Sincerely yours, Applicant Signature Printed Name: Johan Wahlback Title: CEO Address: Hollandargatan 22, 113 59 Stockholm, Sweden Tel.: +46708886989 Email: [email protected] The Art of Utility AB Hollandargatan 22, 113 59 Stockholm, Sweden 2 | P a g e Evaluation regarding to the Covered List Software: Compliance Methodology Evaluation Process Results Device is Inherent compliance ☒ The Chipset(s) used is limited to run the Cybersecurity or anti-virus software. Compliance ☐ The Memory used is limited to run the Cybersecurity or anti-virus software. Compliance ☐ There is storage capacity limitation for store or install the Cybersecurity or anti-virus software. Compliance ☐ Operating system used is limited to run, install or deliver the Cybersecurity or anti-virus software. Compliance Device is not Inherent compliance ☐ Evaluation Based on Software Bill of Materials (SBoM) See attached “SBoM“ Note:The SBoM content is limited to the scope of covered list software (e.g. antivirus and cybersecurity software). ☐ Evaluation Based on Scan for Software on the device ☐ Evaluation Based on Filesystem scan ☐ Evaluation Based on Running software check SBOM (Software Bill of Materials) [For Device is not Inherent compliance] Section Component Name Version Supplier 1 2 3

Attestation Statements

[The Art of Utility AB] [Hollandargatan 22, 113 59 Stockholm, Sweden] Date: Oct. 11, 2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AKFE-D4551 US Agent – Attestation Statement / Part 2.911(d)(7) [The Art of Utility AB] certifies, that as of [Oct. 11, 2025], we have designated FCC US Agent, LLC to accept service of process on our behalf for FCC ID: 2AKFE-D4551. [The Art of Utility AB], accepts to maintain an agent of service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission- related administrative or judicial proceeding involving the equipment, whichever is later. FCC US Agent, LLC, accepts as of the date of the filing of this application, the obligation of being the designated agent for the purpose of accepting service of process on behalf of [The Art of Utility AB] for FCC ID: 2AKFE-D4551. Designated Agent Information: Company Name: FCC US Agent, LLC FRN: 0033402884 Address: 3722 Illinois Avenue, Saint Charles, IL, 60174, USA Contact Person: Tim Payne Phone: 708-571-3148 Email: [email protected] Sincerely, Company: [The Art of Utility AB] FRN: 0026055079 Designated Agent: FCC US Agent, LLC Company Representative: [Johan Wahlback] Tel: +46708886989 Email: [email protected] Designated Agent Representative: Tim Payne Signature: Signature:

Cover Letter(s)

The Art of Utility AB Hollandargatan 22, 113 59 Stockholm, Sweden Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Oct. 13, 2025 Subject; Request for Confidentiality FCC ID: 2AKFE-D4551 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. 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. Schematic Diagram Block Diagram Operational Description In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely Contact person: Johan Wahlback

Cover Letter(s)

The Art of Utility AB Hollandargatan 22, 113 59 Stockholm, Sweden (Oct. 13, 20255) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID: 2AKFE-D4551 I, the undersigned, hereby authorize (Attestation of Global Compliance (Shenzhen) Co., Ltd) to act on our behalf in all matters relating to this application for equipment certification. Any act carried out by (Attestation of Global Compliance (Shenzhen) Co., Ltd) shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES, INC., still resides with (The Art of Utility AB). We certify that we are not subject to a denial of federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862, and that no party to the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, (Signature) Printed Name: Johan Wahlback Title: CEO Tel.: +46708886989 Email: [email protected]

External Photos

Report No.: AGC00806250904AP03 Page 1 of 4 EXTERNAL PHOTOS All VIEW OF EUT TOP VIEW OF EUT Report No.: AGC00806250904AP03 Page 2 of 4 BOTTOM VIEW OF EUT FRONT VIEW OF EUT Report No.: AGC00806250904AP03 Page 3 of 4 BACK VIEW OF EUT LEFT VIEW OF EUT Report No.: AGC00806250904AP03 Page 4 of 4 RIGHT VIEW OF EUT ****************************************End of Report*************************************

ID Label/Location Info

FCC ID Label Location The product does not have enough space to place the label, and FCC ID is reflected in the user manual and package. User manual as below: Package as below:

Internal Photos

Report No.: AGC00806250904AP03 Page 1 of 6 INTERNAL PHOTOS OPEN VIEW OF EUT (FIGURE 1) - Left OPEN VIEW OF EUT (FIGURE 2) Report No.: AGC00806250904AP03 Page 2 of 6 INTERNAL VIEW OF EUT (FIGURE 1) INTERNAL VIEW OF EUT (FIGURE 2) Report No.: AGC00806250904AP03 Page 3 of 6 INTERNAL VIEW OF EUT (FIGURE 3) BATTERY VIEW OF EUT BT Antenna Report No.: AGC00806250904AP03 Page 4 of 6 OPEN VIEW OF EUT (FIGURE 1) - Right INTERNAL VIEW OF EUT (FIGURE 1) Report No.: AGC00806250904AP03 Page 5 of 6 INTERNAL VIEW OF EUT (FIGURE 2) INTERNAL VIEW OF EUT (FIGURE 3) BT Antenna Report No.: AGC00806250904AP03 Page 6 of 6 BATTERY VIEW OF EUT ****************************************End of Report*************************************

RF Exposure Info

Page 1 of 10 RF Exposure Report Report No.: AGC00806250904FH01 FCC ID : 2AKFE-D4551 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Bluetooth Wireless Earphones(True Wireless Type) BRAND NAME : Defunc MODEL NAME : Defunc TRUE ANC II APPLICANT : The Art of Utility AB DATE OF ISSUE : Oct. 11, 2025 STANDARD(S) : FCC Part 2 Subpart J §2.1091 FCC KDB 447498 D01 V06 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC00806250904FH01 Page 2 of 10 Report Revise Record Report Version Revise Time Issued Date Valid Version Notes V1.0 / Oct. 11, 2025 Valid Initial Release Report No.: AGC00806250904FH01 Page 3 of 10 Table of Contents 1. General Information ........................................................................................................................................ 4 2. Product Information ........................................................................................................................................ 5 2.1 Product Technical Description ................................................................................................................... 5 3. Test Environment ............................................................................................................................................ 6 3.1 Address Of The Test Laboratory ............................................................................................................... 6 3.2 Test Facility ................................................................................................................................................ 6 3.3 Environmental Conditions ......................................................................................................................... 7 4. Portable Device Evaluation Method and Limit ............................................................................................. 8 5. Measurement Results ..................................................................................................................................... 9 6. Measurement Evaluation ................................................................................................................................ 9 Report No.: AGC00806250904FH01 Page 4 of 10 1. General Information Applicant The Art of Utility AB Address Holländargatan 22, 11359 Stockholm, Sweden Manufacturer Glory Star Technology Industrial Co., Ltd. Address Room2102, Block 1st, Yi Luan Building, Xixiang Road 230, BaoAn District, Shenzhen, China Factory Glory Star Technology Industrial Co., Ltd. Address Room2102, Block 1st, Yi Luan Building, Xixiang Road 230, BaoAn District, Shenzhen, China Product Designation Bluetooth Wireless Earphones(True Wireless Type) Brand Name Defunc Test Model Defunc TRUE ANC II Series Model(s) N/A Difference Description N/A Date of receipt of test item Sep. 08, 2025 Date of Test Sep. 08, 2025 to Oct. 11, 2025 Deviation from Standard No any deviation from the test method Condition of Test Sample Normal Test Result Pass Test Report Form No AGCER-FCC-RF Exposure-V1 Note: The test results of this report relate only to the tested sample identified in this report. Prepared By Jack Gui (Project Engineer) Oct. 11, 2025 Reviewed By Bibo Zhang (Reviewer) Oct. 11, 2025 Approved By Angela Li (Authorized Officer) Oct. 11, 2025 Report No.: AGC00806250904FH01 Page 5 of 10 2. Product Information 2.1 Product Technical Description Frequency Band (Operating) WLAN: 2.412GHz ~ 2.462GHz WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz WLAN: 5.745GHz ~ 5825GHz Bluetooth: 2.402GHz ~ 2.480GHz Other: Hardware Version XXY_G99C_BOX_V1 Software Version V1.0 Modulation Type BR GFSK, EDR π /4-DQPSK, 8DPSK Device Category Portable (<20cm separation) Mobile (>20cm separation) Others: Antenna Diversity Single antenna Multiple antennas Tx diversity Rx diversity Tx/Rx diversity Antenna Designation Chip Antenna Antenna Gain 2.5dBi Minimum Assessment Distance 5mm Evaluation Applied MPE Evaluation SAR Evaluation Report No.: AGC00806250904FH01 Page 6 of 10 3. Test Environment 3.1 Address Of The Test Laboratory Laboratory: Attestation of Global Compliance (Shenzhen) Co., Ltd. Address: 1-2/F, Building 19, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China 3.2 Test Facility The test facility is recognized, certified, or accredited by the following organizations: CNAS-Lab Code: L5488 Attestation of Global Compliance (Shenzhen) Co., Ltd. has been assessed and proved to follow CNAS-CL01 Accreditation Criteria for Testing and Calibration Laboratories (identical to ISO/IEC17025: 2017 General Requirements for the Competence of Testing and Calibration Laboratories.) A2LA-Lab Cert. No.: 5054.02 Attestation of Global Compliance (Shenzhen) Co., Ltd. EMC Laboratory has been accredited by A2LA for technical competence in the field of electrical testing, and proved to follow ISO/IEC 17025: 2017 General Requirements for the Competence of Testing and Calibration Laboratories and any additional program requirements in the identified field of testing. FCC-Registration No.: 975832 Attestation of Global Compliance (Shenzhen) Co., Ltd. EMC Laboratory has been registered and fully described in a report filed with the FCC (Federal Communications Commission). The acceptance letter from the FCC is maintained in our files with Registration 975832. IC-Registration No.: 24842(CAB identifier: CN0063) Attestation of Global Compliance (Shenzhen) Co., Ltd. EMC Laboratory has been registered and fully described in a report filed with the Certification and Engineering Bureau of Industry Canada. The acceptance letter from the IC is maintained in our files with Registration 24842. Report No.: AGC00806250904FH01 Page 7 of 10 3.3 Environmental Conditions Normal Conditions Temperature range (°C) 15 - 35 Relative humidity range 20 % - 75 % Pressure range (kPa) 86 - 106 Power supply DC 3.7V by battery or DC 5V by Charging …

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Test Report

深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 1 OF 9 2.0X1.2X0.65 (mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification 1. Product Number (1)Product Type Chip Antenna (2)Size Code 2.0x1.2x0.65mm (3)Type Code C1 (4)Packing Paper &Reel (5)Frequency 2.45GHz YF 2012 C1 P 2G 45 1 2 3 4 5 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 2 OF 9 2. Features *Stable and reliable in performances *Low temperature coefficient of frequency *Low profile, compact size *RoHS compliance *SMT processes compatible 3. Applications *Bluetooth earphone systems *Hand-held devices when WiFi /Bluetooth functions are needed, e.g., Smart phone. *IEEE802.11 b/g/n *ZigBee *Wireless PCMCIA cards or USB dongle 4. Description Yingfeng chip antenna series are specially designed for WiFi/Bluetooth applications. Based on yingfeng proprietary design and processes, this chip antenna has excellent stability and sensitivity to consistently provide high signal reception efficiency. 5. Electrical Specifications (80 x 40 mm 2 ground plane) 5-1. Electrical Table Characteristics Specifications Unit Outline Dimensions 2.0x1.2x0.65 mm Working Frequency 2400~2500 MHz VSWR 2 Max. Impedance 50  Polarization Linear Polarization Gain Peak 2.5 (typical) dBi Efficiency 75 (typical) % 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 3 OF 9 5-2. Return Loss & VSWR Return Loss (S 11 ) VSWR(S 11 ) 6. Antenna Dimensions & Test Board (unit: mm) a. Antenna Dimensions 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 4 OF 9 7. Radiation Pattern (80 x 40 mm 2 ground plane) 7-1. 3D Gain Pattern @ 2442 MHz Z Y X X Y Y X X Y Z 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 5 OF 9 7-2. 3D Efficiency Table Frequency( MHz) 2400 2410 2420 2430 2442 2450 2460 2470 2480 2490 2500 Efficiency (dB) -1.4 -1.0 -0.9 -0.7 -0.7 -0.8 -0.9 -1.1 -1.2 -1.3 -1.4 Efficiency (%) 72.8 73.7 74.3 74.4 75.5 75.0 74.0 73.6 73.1 72.6 71.5 Gain (dBi) 2.1 2.2 2.3 2.4 2.5 2.5 2.4 1.8 1.7 1.6 1.4 8. Layout Guide a. Solder Land Pattern: Land pattern for soldering (gray marking areas) is as shown below. Depending on Customer’s requirement, matching circuit as shown below is also recommended. Top View Bottom View Unit: mm 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 6 OF 9 b. Test Board with Antenna 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 7 OF 9 9. Frequency tuning a. Chip antenna tuning scenario: b. Matching circuit:(Center frequency is about 2442 MHz @ 80 x 40 mm 2 ground plane) System Matching Circuit Component Location Description Vendor Toleranc e 1 1.2 pF* Murata (0402) ±0.1 pF 2 10PF* Murata(0402) ±0.5 PF 3 N/A* - - Fine tuning element 4 10 pF* Murata (0402) ±0.1 pF *Typical reference values which may need to be changed when circuit boards or part vendors are different. c. Fine tuning element vs. Center frequency Matching circuit Feed 4. Fine tuning elemet 1 2 3 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 8 OF 9 10. Soldering Conditions a. Typical Soldering Profile for Lead-free Process 11. Packing (1) Quantity/Reel: 4000 pcs/Reel (2) Plastic tape: Time 60-180s 60-150s 20- Pre- 150-200° 217°C 260° Temperature (°C) 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by:MR.FANG TITLE:2.0 x 1.2 x 0.65(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF2012C1) Engineering Specification DOCUMEN T YF2012C1P2G45 REV. NO. B PAGE 9 OF 9

Test Report

Page 1 of 80 FCCTestReport ReportNo.:AGC00806250904FR01 FCCID: 2AKFE-D4551 APPLICATIONPURPOSE: OriginalEquipment PRODUCTDESIGNATION: BluetoothWirelessEarphones(TrueWirelessType) BRANDNAME: Defunc MODELNAME: DefuncTRUEANCII APPLICANT: TheArtofUtilityAB DATEOFISSUE: Oct.11,2025 STANDARD(S):FCCPart15SubpartC§15.247 REPORTVERSION:V1.0 AttestationofGlobalCompliance(Shenzhen)Co.,Ltd ReportNo.:AGC00806250904FR01 Page2of80 ReportReviseRecord ReportVersionReviseTimeIssuedDateValidVersionNotes V1.0/ Oct.11,2025 ValidInitialRelease ReportNo.:AGC00806250904FR01 Page3of80 TableofContents 1.GeneralInformation..........................................................................................................................................5 2.ProductInformation..........................................................................................................................................6 2.1ProductTechnicalDescription....................................................................................................................6 2.2TestFrequencyList.....................................................................................................................................6 2.3RelatedSubmittal(S)/Grant(S).................................................................................................................7 2.4TestMethodology........................................................................................................................................7 2.5ReceiverInputBandwidth...........................................................................................................................7 2.6EquallyAverageUseofFrequenciesandBehaviour................................................................................7 2.7PseudorandomFrequencyHoppingSequence.........................................................................................8 2.8SpecialAccessories....................................................................................................................................9 2.9EquipmentModifications.............................................................................................................................9 2.10AntennaRequirement...............................................................................................................................9 3.TestEnvironment............................................................................................................................................10 3.1AddressofTheTestLaboratory................................................................................................................10 3.2TestFacility................................................................................................................................................10 3.3EnvironmentalConditions.........................................................................................................................11 3.4MeasurementUncertainty.........................................................................................................................11 3.5ListofEquipmentUsed.............................................................................................................................12 4.SystemTestConfiguration.............................................................................................................................14 4.1EUTConfiguration....................................................................................................................................14 4.2EUTExercise............................................................................................................................................14 4.3ConfigurationofTestedSystem................................................................................................................14 4.4EquipmentUsedinTestedSystem..........................................................................................................15 4.5SummaryofTestResults..........................................................................................................................16 5.DescriptionofTestModes.............................................................................................................................17 6.RFOutputPowerMeasurement....................................................................................................................19 6.1ProvisionsApplicable................................................................................................................................19 6.2MeasurementProcedure..........................................................................................................................19 6.3MeasurementSetup(BlockDiagramofConfiguration)...........................................................................19 6.4MeasurementResult.................................................................................................................................20 7.20dBBandwidthand99%OccupiedBandwidthMeasurement...............................................................26 7.1ProvisionsApplicable................................................................................................................................26 7.2MeasurementProcedure..........................................................................................................................26 7.3MeasurementSetup(BlockDiagramofConfiguration)...........................................................................26 7.4MeasurementResults...............................................................................................................................27 8.ConductedBandEdgeandOut-of-BandEmissions..................................................................................32 8.1ProvisionsApplicable................................................................................................…

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Test Report

ReportNo.:AGC00806250904FR01 Page44of80 Test_Graph_EDR_ANT1_2402_3Mbps_HigherBandEmissions Test_Graph_EDR_ANT1_2441_3Mbps_ReferenceLevel ReportNo.:AGC00806250904FR01 Page45of80 Test_Graph_EDR_ANT1_2441_3Mbps_LowerBandEmissions Test_Graph_EDR_ANT1_2441_3Mbps_HigherBandEmissions ReportNo.:AGC00806250904FR01 Page46of80 Test_Graph_EDR_ANT1_2480_3Mbps_ReferenceLevel Test_Graph_EDR_ANT1_2480_3Mbps_LowerBandEmissions ReportNo.:AGC00806250904FR01 Page47of80 Test_Graph_EDR_ANT1_2480_3Mbps_HigherBandEmissions ReportNo.:AGC00806250904FR01 Page48of80 TestGraphsofBandEdgeEmissionsinNon-RestrictedFrequencyBands Test_Graph_BR_ANT1_2402_1Mbps_LowerBandEdgeEmissions Test_Graph_BR_ANT1_2480_1Mbps_HigherBandEdgeEmissions ReportNo.:AGC00806250904FR01 Page49of80 Test_Graph_BR_HOP_ANT1_NA_1Mbps_LowerBandEdgeEmissions Test_Graph_BR_HOP_ANT1_NA_1Mbps_HigherBandEdgeEmissions ReportNo.:AGC00806250904FR01 Page50of80 Test_Graph_EDR_ANT1_2402_2Mbps_LowerBandEdgeEmissions Test_Graph_EDR_ANT1_2480_2Mbps_HigherBandEdgeEmissions ReportNo.:AGC00806250904FR01 Page51of80 Test_Graph_EDR_HOP_ANT1_NA_2Mbps_LowerBandEdgeEmissions Test_Graph_EDR_HOP_ANT1_NA_2Mbps_HigherBandEdgeEmissions ReportNo.:AGC00806250904FR01 Page52of80 Test_Graph_EDR_ANT1_2402_3Mbps_LowerBandEdgeEmissions Test_Graph_EDR_ANT1_2480_3Mbps_HigherBandEdgeEmissions ReportNo.:AGC00806250904FR01 Page53of80 Test_Graph_EDR_HOP_ANT1_NA_3Mbps_LowerBandEdgeEmissions…

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Contact Information

Applicant

Johan Wahlback(CEO)
[email protected]Fax: +46708886989

Technical Contact

FCC US Agent, LLCTim Payne
[email protected]

3722 Illinois Avenue · Saint Charles, Illinois, 60174 · United States

Test Firm

Attestation of Global Compliance (Shenzhen) Co., LDoris Li
[email protected]

Technical Specifications

#Rule PartsFrequency RangePower Output
115C2.40 GHz - 2.48 GHz800.00 µW
Confidentiality
Long Term
Grant Notes
Output power listed is conducted power.

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