2AM73-0007Wireless DJ Headphones

Rev 1/26/2023 AlphaTheta Corporation Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 05/21/2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2AM73-0007 AlphaTheta Corporation (“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. AlphaTheta Corporation (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) (Applicant printed name) Hiroaki Yoshida Rev 1/26/2023 AlphaTheta Corporation Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 05/21/2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2AM73-0007 AlphaTheta Corporation (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Hiroaki Yoshida

AlphaTheta Corporation U.S. Agent Designation for Service of Process - Certification Attestation Letter 5/21/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID:2AM73-0007 FCC Registration Number (FRN): 0030197354 Per section 2.911(d)(7) of the FCC rules, AlphaTheta Corporation (“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: AlphaTheta Music Americas, Inc. FCC Registration Number (FRN): 0034149922 Physical U.S. Company Address: 2050 W. 190 th Street, Suite 109 Torrance, CA 90504 Contact Person: Michelle Goode 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: Company Representative: Hiroaki Yoshida/Manager Designated Agent Representative: Michelle Goode /Sr.Manager Company: AlphaTheta Corporation Designated Agent: AlphaTheta Music Americas, Inc. Date: 05/21/2026 Date: 05/21/2026

AlphaTheta Corporation Declaration i on model difference All models are identical in circuitry and electrical, mechanical and physical construction; Only the difference in color; FCC ID: 2AM73-0007 Production name Trade name Model no. Wireless DJ Headphones AlphaTheta HDJ-F5-K, HDJ-F5-W Note: Only the difference in color. HDJ-F5-K HDJ-F5-W Date: 05/21/2026 Signature: Hiroaki Yoshida/Manager E-mail:[email protected] AlphaTheta Corporation 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 JAPAN

AlphaTheta Corporation Date: 05/21/2026 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD FCC ID: 2AM73-0007 To Whom It May Concern: This letter is to ascertain that AlphaTheta Corporation EUT：Wireless DJ Headphones MODEL No.: HDJ-F5-K, HDJ-F5-W Has been the units used for conducting FCC compliance testing, the SDoC part will be tested by EMTEK (SHENZHEN) CO., LTD. If you have any question or concerns, pls. contact us. Sincerely, Client’s signature ： Client’s name / title ： Hiroaki Yoshida / Manager Contact information / address: AlphaTheta Corporation /6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 JAPAN

RF_160, Issue 03 Declaration of Authorization We Name: AlphaTheta Corporation Address: 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 JAPAN City: Yokohama State or Country: Japan Declare that: Name Representative of agent: Lisa Wang (1) Agent Company name: EMTEK (SHENZHEN) CO., LTD. Address: Bldg 69, Majialong Industry Zone, Nanshan District, City: Shenzhen Country China is authorized to apply for Certification of the following product(s): Product description: Wireless DJ Headphones Type designation: HDJ-F5-K, HDJ-F5-W Trademark: AlphaTheta FCC ID: 2AM73-0007 on our behalf. Date: 05/21/2026 Name: Hiroaki Yoshida Function: Manager Signature: Notes: (1): Required for FCC application (2): For FCC it must be the Grantee Code “owner” or the authorized agent.

FCC, Request for non-disclosure Date: 16-Jul-10 RF_501, Issue 6 Page 1 of 1 Company Name: AlphaTheta Corporation Address: 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 JAPAN City: Yokohama Country: JAPAN To: Telefication B.V., Dept. FCC TCB Edisonstraat 12A 6902 PK ZEVENAAR The Netherlands Subject: Request for confidentiality FCC ID: 2AM73-0007 Reference number: ###### Dear FCC TCB, 1. Long-Term Confidentiality Pursuant to 47 CFR Section 0.459(a) & (b), we hereby requests non-disclosure and confidential treatment of the following materials submitted in support of FCC certification application: Bill(s) of Material Block Diagrams Operational Description Schematic Diagrams Tune-up Procedure Above materials contain secrets, proprietary and technical information, which would customarily be guarded from competitors under 47 CFR, section 0.457(d)(2). Disclosure or publication or any portion of this company confidential material to other parties could cause substantial competitive harm and provide unjustified benefits for competitors. 2. Short-Term Confidentiality (STC) Pursuant to Public Notice DA 04-1705 of the Commission’s policy, in order to comply with the marketing regulations in 47 CFR §2.803 and the importation rules in 47 CFR §2.1204, applicant hereby requests Short-Term Confidential treatment of the following materials (note 1): Internal Photos User’s Manual Test Set-up Photos External Photos Justification: The product is not on the market yet Planned Release Date STC: 11/05/2026 (notes 2, 3, 4, 5) Date: 05/21/2026 Name and signature of applicant: Hiroaki Yoshida Notes: 1) A document or type of document can only have ONE type of confidentiality! 2) Short-Term confidentiality is in principle for 45 days from date of grant; it can be extended max 3 times (total time 180 days max.)! 3) FCC must be informed when marketing begins earlier. 4) Release takes place automatically thus extension must be requested in time. Telefication does not remind you of this! 5) Request for extension or for release must be received by Telefication at least 7 days before date of actual marketing or before expiration of the STC period

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Test Laboratory: Shenzhen EMTEKCo.,Ltd.Date: 2026/4/8 System Check_H2450 DUT: Dipole 2450 MHz; Type:D2450V2; SN:927 Communication System: CW; Frequency: 2450 MHz;Duty Cycle: 1:1 Medium: H2450 Medium parameters used: f = 2450 MHz;σ=1.83S/m;ε r = 39.52;ρ=1000kg/m 3 AmbientTemperature：22.8°C; LiquidTemperature：22.6°C DASY5 Configuration: - Probe: EX3DV4 - SN3970; Calibrated: 2025/6/5 - Electronics: DAE4 Sn1418; Calibrated: 2025/6/5 - Phantom: SAM; Type: QD000P40CD; Serial: TP:1794 - Measurement SW: DASY52, Version 52.10 (4); SEMCAD X Version 14.6.14 (7501) Pin=250mW/Area Scan (61x61x1):Interpolated grid: dx=1.500 mm, dy=1.500 mm Maximum value of SAR (interpolated) = 21.8 W/kg Pin=250mW/Zoom Scan (5x5x7)/Cube 0:Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 99.334 V/m; Power Drift = 0.09 dB Peak SAR (extrapolated) = 31.7 W/kg SAR(1 g) = 13.12 W/kg; SAR(10 g) = 6.14 W/kg Maximum value of SAR (measured) = 21.5 W/kg

Test Laboratory: Shenzhen EMTEK Co.,Ltd.Date: 2026/4/8 BT DUT: HDJ-F5-K, HDJ-F5-W Communication System:BT; Frequency: 2402 MHz;Duty Cycle: 1:1.3021 Medium: H2450 Medium parameters used: f = 2402 MHz;σ=1.75S/m;ε r = 39.65;ρ=1000kg/m 3 AmbientTemperature：22.8°C; LiquidTemperature：22.6°C DASY5 Configuration: - Probe: EX3DV4 - SN3970; Calibrated: 2025/6/5 - Electronics: DAE4 Sn1418; Calibrated: 2025/6/5 - Phantom: SAM; Type: QD000P40CD; Serial: TP:1794 - Measurement SW: DASY52, Version 52.10 (4); SEMCAD X Version 14.6.14 (7501) Back-3DH5 Low/Area Scan (7x7x1):Measurement grid: dx=10mm, dy=10mm Maximum value of SAR (measured) = 0.838 W/kg Back-3DH5 Low/Zoom Scan (7x7x7)/Cube 0:Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 7.018 V/m; Power Drift = -0.04 dB Peak SAR (extrapolated) = 0.98 W/kg SAR(1 g) = 0.610 W/kg; SAR(10 g) = 0.250 W/kg Smallest distance from peaks to all points 3 dB below = 6.9 mm Ratio of SAR at M2 to SAR at M1 = 55.7% Maximum value of SAR (measured) = 0.900 W/kg Test Laboratory: Shenzhen EMTEK Co.,Ltd.Date: 2026/4/8 2.4G SRD Ant1 DUT: HDJ-F5-K, HDJ-F5-W Communication System:BT; Frequency: 2402 MHz;Duty Cycle: 1:14.5772 Medium: H2450 Medium parameters used: f = 2402 MHz;σ=1.75S/m;ε r = 39.65;ρ=1000kg/m 3 AmbientTemperature：22.8°C; LiquidTemperature：22.6°C DASY5 Configuration: - Probe: EX3DV4 - SN3970; Calibrated: 2025/6/5 - Electronics: DAE4 Sn1418; Calibrated: 2025/6/5 - Phantom: SAM; Type: QD000P40CD; Serial: TP:1794 - Measurement SW: DASY52, Version 52.10 (4); SEMCAD X Version 14.6.14 (7501) Back-Low/Area Scan (7x7x1):Measurement grid: dx=10mm, dy=10mm Maximum value of SAR (measured) = 0.619 W/kg Back-Low/Zoom Scan (7x7x7)/Cube 0:Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 14.28 V/m; Power Drift = -0.11 dB Peak SAR (extrapolated) = 0.825 W/kg SAR(1 g) = 0.380 W/kg; SAR(10 g) = 0.170 W/kg Smallest distance from peaks to all points 3 dB below = 3.2 mm Ratio of SAR at M2 to SAR at M1 = 65.7% Maximum value of SAR (measured) = 0.630 W/kg Test Laboratory: Shenzhen EMTEK Co.,Ltd.Date: 2026/4/8 2.4G SRD Ant2 DUT: HDJ-F5-K, HDJ-F5-W Communication System:BT; Frequency: 2480 MHz;Duty Cycle: 1:14.5772 Medium: H2450 Medium parameters used: f = 2480 MHz;σ=1.88S/m;ε r =39.73;ρ=1000kg/m 3 AmbientTemperature：22.8°C; LiquidTemperature：22.6°C DASY5 Configuration: - Probe: EX3DV4 - SN3970; Calibrated: 2025/6/5 - Electronics: DAE4 Sn1418; Calibrated: 2025/6/5 - Phantom: SAM; Type: QD000P40CD; Serial: TP:1794 - Measurement SW: DASY52, Version 52.10 (4); SEMCAD X Version 14.6.14 (7501) Back-High/Area Scan (7x7x1):Measurement grid: dx=10mm, dy=10mm Maximum value of SAR (measured) = 0.357 W/kg Back-High/Zoom Scan (7x7x7)/Cube 0:Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 10.29 V/m; Power Drift = -0.18 dB Peak SAR (extrapolated) = 0.0590 W/kg SAR(1 g) = 0.280 W/kg; SAR(10 g) = 0.140 W/kg Smallest distance from peaks to all points 3 dB below = 5.6 mm Ratio of SAR at M2 to SAR at M1 = 39.8% Maximum value of SAR (measured) = 0.450 W/kg

深圳市丰禾原电子科技有限公司 SUNITECENTERPRISECO.,LTD. 1 ANTENNASPECIFICATION Project： EA222 Version： V0.1 IssuedDate： 2026.03.20 Testedby： Lite.Mo Checkby： Xun.Li Manufacturer： SunitecEnterpriseCo.,LTD. THISDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFSUNITEC ENTERPRISECO.,LTD.ANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION 2 Contents 1.RevisionHistory 2.Introduction 3.ElectricalCharacteristics THISDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFSUNITEC ENTERPRISECO.,LTD.ANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION 3 1.RevisionHistory Rev.NoIssuedDateDescriptionSummary V0.12026.03.20initialrelease 2.Introduction 2.1IntroductionofProduct ThisproductisaBluetoothantennawithLayoutonPCB 2.2Dimension 3.ElectricalCharacteristics 3.1Testequipment: EquipmentManufacturerModelNoSerialNo. LastCal.DueDate VECTOR NETWORK ANALYZER AgilentE5071C2025.10.102026.10.9 Antenna Measurement System ETS-Lindgren AMS-80502025.10.102026.10.9 ETS-Lindgren EMCenter ModularRF Platform 2025.10.102026.10.9 ANT1 ANT2 THISDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFSUNITEC ENTERPRISECO.,LTD.ANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION 4 3.2AntennaS11parameters ANT1 ANT2 THISDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFSUNITEC ENTERPRISECO.,LTD.ANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION 5 3.3AntennaTestSettings: 3.43DRadiationPattern: 3.5ElectricalCharacteristics: ANT1ANT2 AntennatypePCBLayoutAntennaPCBLayoutAntenna WorkingFrequencyRange 2450±50MHz2450±50MHz Impedance50Ω50Ω VSWR<2<2 MaxEfficiency(%)49.8%@2400MHz49.4%@2420MHz MaxpeakGain(dBi)[email protected]@2460MHz PolarizationLinearLinear ANT1 ANT2 THISDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFSUNITEC ENTERPRISECO.,LTD.ANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION 6 ANT2 ANT1

Report No. ENS2601300321W01602R Page 1 of 51 Ver.1.0 TEST REPORT Product Name ： Wireless DJ Headphones Model Number ： HDJ-F5-K, HDJ-F5-W FCC ID ：2AM73-0007 Prepared for : AlphaTheta Corporation Address : 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kana gawa 220-0012 JAPAN Prepared by : EMTEK (SHENZHEN) CO., LTD. Address : Building 69, Majialong Industry Zone, Nanshan District, Shenzhen, Guan gdong, China Tel: (0755) 26954280 Fax: (0755) 26954282 Report Numbe r : ENS2601300321W01602R Date (s) of Tests : March 16, 2026 to April 4, 2026 Date of issue : April 4, 2026 $二维码$ Report No. ENS2601300321W01602R Page 2 of 51 Ver.1.0 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION .......................................................................................................................... 3 2 EUT TECHNICAL DESCRIPTION ........................................................................................................................ 5 3 SUMMARY OF TEST RESULT ............................................................................................................................. 6 4 TEST METHODOLOGY ........................................................................................................................................ 7 4.1 GENERAL DESCRIPTION OF APPLIED STANDARDS ................................................................................. 7 4.2 MEASUREMENT EQUIPMENT USED ........................................................................................................... 7 4.3 DESCRIPTION OF TEST MODES .................................................................................................................. 8 5 FACILITIES AND ACCREDITATIONS .................................................................................................................. 9 5.1 FACILITIES ..................................................................................................................................................... 9 5.2 LABORATORY ACCREDITATIONS AND LISTINGS ...................................................................................... 9 6 TEST SYSTEM UNCERTAINTY ......................................................................................................................... 10 7 SETUP OF EQUIPMENT UNDER TEST ............................................................................................................ 11 7.1 RADIO FREQUENCY TEST SETUP 1 .......................................................................................................... 11 7.2 RADIO FREQUENCY TEST SETUP 2.......................................................................................................... 11 7.3 CONDUCTED EMISSION TEST SETUP ...................................................................................................... 13 7.4 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM .......................................................................... 14 7.5 SUPPORT EQUIPMENT ............................................................................................................................... 14 8 TEST REQUIREMENTS ..................................................................................................................................... 15 8.1 DTS 6DB BANDWIDTH ................................................................................................................................ 15 8.2 MAXIMUM PEAK CONDUCTED OUTPUT POWER .................................................................................... 18 8.3 MAXIMUM POWER SPECTRAL DENSITY .................................................................................................. 21 8.4 UNWANTED EMISSIONS IN NON-RESTRICTED FREQUENCY BANDS .................................................. 24 8.5 RADIATED SPURIOUS EMISSION .............................................................................................................. 35 8.6 CONDUCTED EMISSIONS TEST ................................................................................................................ 47 8.7 ANTENNA APPLICATION ............................................................................................................................. 50 Report No. ENS2601300321W01602R Page 3 of 51 Ver.1.0 1 TEST RESULT CERTIFICATION Applicant : AlphaTheta Corporation Address： 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 JAPAN Manufacturer : AlphaTheta Corporation Address： 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 JAPAN EUT : Wireless DJ Headphones Model Name : HDJ-F5-K, HDJ-F5-W Trademark : AlphaTheta Measurement Procedure Used: APPLICASRD 2.4GSTANDARDS STANDARD TEST RESULT FCC 47 CFR Part 2 , Subpart J FCC 47 CFR Part 15, Subpart C PASS The above equipment was tested by EMTEK(SHENZHEN) CO., LTD. The test data, data evaluation, test procedures, and equipment configurations shown in this report were made in accordance with the procedures given in ANSI C63.10 (2020) and the energy emitted by the sample EUT tested as described in this report is in compliance with the requirements of FCC Rules Part 2 and Part 15.247 The test results of this report relate only to the tested sample identified in this report Date of Test : March 16, 2026 to April 4, 2026 Prepared b y : Una Yu/Editor Reviewer : Joe Xia/Supervisor Approved & Authorized Signer : Lisa Wan g/Manager Report No. ENS2601300321W01602R Page 4 of 51 Ver.1.0 Modified Information Version Report No. Revision Date Summary Ver.1.0 ENS2601300321W01602R / Original Report Report No. ENS2601300321W01602R Page 5 of 51 Ver.1.0 2 EUT TECHNICAL DESCRIPTION Product Wireless DJ Headphones Model Number HDJ-F5-K, HDJ-F5-W Note: Onl y the difference in color. Device Type SRD 2.4G Modulation GFSK Operating Frequency Range 2402-2480MHz Number of Channels 79Channels Antenna Type Antenna1: PCB Antenna Antenna2: PCB Antenna Antenna Gain …

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Report No. ENS2601300321W01603R Page 1 of 52 Ver.1.0 TEST REPORT Product Name ： Wireless DJ Headphones Model Number ： HDJ-F5-K, HDJ-F5-W FCC ID ：2AM73-0007 Prepared for : AlphaTheta Corporation Address : 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kana gawa 220-0012 JAPAN Prepared by : EMTEK (SHENZHEN) CO., LTD. Address : Building 69, Majialong Industry Zone, Nanshan District, Shenzhen, Guan gdong, China Tel: (0755) 26954280 Fax: (0755) 26954282 Report Numbe r : ENS2601300321W01603R Date (s) of Tests : March 16, 2026 to April 4, 2026 Date of issue : April 4, 2026 $二维码$ Report No. ENS2601300321W01603R Page 2 of 52 Ver.1.0 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION .......................................................................................................................... 3 2 EUT TECHNICAL DESCRIPTION ........................................................................................................................ 5 3 SUMMARY OF TEST RESULT ............................................................................................................................. 6 4 TEST METHODOLOGY ........................................................................................................................................ 7 4.1 GENERAL DESCRIPTION OF APPLIED STANDARDS ................................................................................. 7 4.2 MEASUREMENT EQUIPMENT USED ........................................................................................................... 7 4.3 DESCRIPTION OF TEST MODES .................................................................................................................. 8 5 FACILITIES AND ACCREDITATIONS .................................................................................................................. 9 5.1 FACILITIES ..................................................................................................................................................... 9 5.2 LABORATORY ACCREDITATIONS AND LISTINGS ...................................................................................... 9 6 TEST SYSTEM UNCERTAINTY ......................................................................................................................... 10 7 SETUP OF EQUIPMENT UNDER TEST ............................................................................................................ 11 7.1 RADIO FREQUENCY TEST SETUP 1 .......................................................................................................... 11 7.2 RADIO FREQUENCY TEST SETUP 2.......................................................................................................... 11 7.3 CONDUCTED EMISSION TEST SETUP ...................................................................................................... 13 7.4 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM .......................................................................... 14 7.5 SUPPORT EQUIPMENT ............................................................................................................................... 14 8 TEST REQUIREMENTS ..................................................................................................................................... 15 8.1 DTS 6DB BANDWIDTH ................................................................................................................................ 15 8.2 MAXIMUM PEAK CONDUCTED OUTPUT POWER .................................................................................... 18 8.3 MAXIMUM POWER SPECTRAL DENSITY .................................................................................................. 21 8.4 UNWANTED EMISSIONS IN NON-RESTRICTED FREQUENCY BANDS .................................................. 24 8.5 RADIATED SPURIOUS EMISSION .............................................................................................................. 35 8.6 CONDUCTED EMISSIONS TEST ................................................................................................................ 48 8.7 ANTENNA APPLICATION ............................................................................................................................. 51 Report No. ENS2601300321W01603R Page 3 of 52 Ver.1.0 1 TEST RESULT CERTIFICATION Applicant : AlphaTheta Corporation Address： 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 JAPAN Manufacturer : AlphaTheta Corporation Address： 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 JAPAN EUT : Wireless DJ Headphones Model Name : HDJ-F5-K, HDJ-F5-W Trademark : AlphaTheta Measurement Procedure Used: APPLICABLE STANDARDS STANDARD TEST RESULT FCC 47 CFR Part 2 , Subpart J FCC 47 CFR Part 15, Subpart C PASS The above equipment was tested by EMTEK(SHENZHEN) CO., LTD. The test data, data evaluation, test procedures, and equipment configurations shown in this report were made in accordance with the procedures given in ANSI C63.10 (2020) and the energy emitted by the sample EUT tested as described in this report is in compliance with the requirements of FCC Rules Part 2 and Part 15.247 The test results of this report relate only to the tested sample identified in this report Date of Test : March 16, 2026 to April 4, 2026 Prepared b y : Una Yu/Editor Reviewer : Joe Xia/Supervisor Approved & Authorized Signer : Lisa Wan g/Manager Report No. ENS2601300321W01603R Page 4 of 52 Ver.1.0 Modified Information Version Report No. Revision Date Summary Ver.1.0 ENS2601300321W01603R / Original Report Report No. ENS2601300321W01603R Page 5 of 52 Ver.1.0 2 EUT TECHNICAL DESCRIPTION Product Wireless DJ Headphones Model Number HDJ-F5-K, HDJ-F5-W Note: Only the difference in color. Data Rate 1Mbps/2Mbps Modulation GFSK Operating Frequency Range 2402-2480MHz Number of Channels 40 Channels for BT-LE 1Mbps 38 Channels for B T-LE 2Mbps Antenna Type PCB Antenna Ant…

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