2ACE5-TWS390TWS earbuds

TELEPHONE EST (HK) CO., LTD Covered Equipment Certification Attestation Letter 12/22/2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2ACE5-TWS390 TELEPHONE EST (HK) 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. 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. TELEPHONE EST (HK) 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. TELEPHONE EST (HK) CO., LTD (“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). Signed: Printed name: Honghong Chen Title: Manager Company Name: TELEPHONE EST (HK) CO., LTD Date: 12/22/2025

DATE: 12/22/2025 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen EU Testing Laboratory Limited (101, Building B1, Fuqiao Fourth Area, Qiaotou Community Fuhai Subdistrict Baoan District,Shenzhen,China) (Name of Agent company name and address) 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 TELEPHONE EST (HK) CO., LTD (Room 709, 7F, FuLi tianhe commercial building, Linhe, East Road and tianhe district, Guangzhou, China ) (Applicant Name and address) Signed: Printed name: Honghong Chen Title: Manager Company Name: TELEPHONE EST (HK) CO., LTD Date: 12/22/2025

Date 12/22/2025 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Compliance Testing, LLC to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). Sincerely, Signed: Printed name: Honghong Chen Title: Manager Company Name: TELEPHONE EST (HK) CO., LTD Date: 12/22/2025

DATE 12/22/2025 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: ___ 2ACE5-TWS390 ______ Product Name: ___ TWS earbuds___ Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commission’s rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...) • 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. Signed: Printed name: Honghong Chen Title: Manager Company Name: TELEPHONE EST (HK) CO., LTD Date: 12/22/2025

DATE : 12/22/2025 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2ACE5-TWS390 Product Name: TWS earbuds Request for Short-Term Confidentiality Pursuant to Sections 0.457 and 0.459 of the commission rules, and in accordance with the FCC Public notice dated June 15, 2004 (DA 04-1705), we hereby request short-term confidentiality for the following items prior to marketing the device.:  Test Setup Photos  External Photos  Internal Photos  User Manual The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of 180 days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Signed: Printed name: Honghong Chen Title: Manager Company Name: TELEPHONE EST (HK) CO., LTD Date: 12/22/2025

TELEPHONE EST (HK) CO., LTD Declaration on Model Differences We, TELEPHONE EST (HK) CO., LTD Room 709, 7F, FuLi tianhe commercial building, Linhe, East Road and tianhe district, Guangzhou, China Declare that the following product(s): Product Name: TWS earbuds Model No.: XYS-TWS390BK, TS-25AG46 FCC ID: 2ACE5-TWS390 All models are same with electrical parameters and internal circuit structure, but only differ in appearance color and model name. Therefore, the (XYS-TWS390BK) model will be the primary test model. The manufacturer would take all the responsibilities for the above product(s). For and on behalf of Guangzhou, China Authorized person Location Name: Honghong Chen Position: Manager Date of issue: 2025-1 2-2 2 *I hereby declare that I am entitled to sign on behalf of the applicant and that the information supplied is correct and complete.

Label Location Label Size: 10*10mm FCC ID: 2ACE5-TWS390

RF EXPOSURE EVALUATION FCC ID: 2ACE5-TWS390 According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in §1.1307(b): 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 qualify for TCB approval. BT: Channel (MHz) Maximum output power (dBm) Tune up tolerance (dBm) Max Tune Up Power (dBm) Distance (mm) Calculation results Limit Operating Mode 2402 -2.51 -2.51±1 -1.51 5 0.219 3 BT 2441 -3.11 -3.11±1 -2.11 5 0.192 3 2480 -2.27 -2.27±1 -1.27 5 0.235 3 2402 -0.04 -0.04±1 0.96 5 0.387 3 2441 -0.59 -0.59±1 0.41 5 0.343 3 2480 0.24 0.24±1 1.24 5 0.419 3 Test Results: PASS.

TEST REPORT Report No.: 8336EU122013W Applicant: TELEPHONE EST (HK) CO., LTD Address: Room 709, 7 F, FuLi tianhe commercial building, Linhe, East Road and tianhe district, Guangzhou, China Product Name: TWS earbuds Model No.: XYS-TWS390BK (refer to clause 2.4) Trademark: N/A FCC ID: 2ACE5-TWS390 Test Standard(s): 47 CFR Part 15.247 Test Result: Pass Date of Receipt: Nov. 20, 2025 Test Date: Nov. 20, 2025 - Nov. 28, 2025 Date of Issue: Dec. 18, 2025 ISSUED BY: SHENZHEN EU TESTING LABORATORY LIMITED Prepared by: Reviewed and Approved by: Landon Qiu/ Engineer Sally Zhang/ Manager Page 2 of 89 Report No.: 8336EU122013W TRF Version: A01 Revision Record Report Version Issued Date Description Status V0 Dec. 18, 2025 Original Valid Page 3 of 89 Report No.: 8336EU122013W TRF Version: A01 Table of Contents 1 COVER PAGE .................................................................................................................................. 1 2 GENERAL INFORMATION ....................................................................................................................... 5 2.1 APPLICANT INFORMATION .................................................................................................................. 5 2.2 MANUFACTURER INFORMATION .......................................................................................................... 5 2.3 FACTORY INFORMATION ..................................................................................................................... 5 2.4 GENERAL DESCRIPTION OF E.U.T. ..................................................................................................... 5 2.5 TECHNICAL INFORMATION OF E.U.T. ................................................................................................... 6 3 TEST SUMMARY ...................................................................................................................................... 7 3.1 TEST STANDARD ............................................................................................................................... 7 3.2 TEST VERDICT ................................................................................................................................... 7 3.3 TEST LABORATORY ........................................................................................................................... 8 4 TEST CONFIGURATION .......................................................................................................................... 9 4.1 TEST ENVIRONMENT .......................................................................................................................... 9 4.2 TEST EQUIPMENT .............................................................................................................................. 9 4.3 DESCRIPTION OF SUPPORT UNIT ....................................................................................................... 11 4.4 TEST MODE ..................................................................................................................................... 11 4.5 DESCRIPTION OF CALCULATION ........................................................................................................ 11 4.5.1 Field Strength Calculation .................................................................................................. 11 4.5.2 Disturbance Calculation ..................................................................................................... 11 4.6 MEASUREMENT UNCERTAINTY ......................................................................................................... 12 4.7 DEVIATION FROM STANDARDS .......................................................................................................... 12 4.8 ABNORMALITIES FROM STANDARD CONDITION.................................................................................. 12 5 EVALUATION RESULTS (EVALUATION) .............................................................................................. 13 5.1 ANTENNA REQUIREMENT .................................................................................................................. 13 5.1.1 Test Specification .............................................................................................................. 13 5.1.2 Test Data ........................................................................................................................... 13 6 RADIO SPECTRUM MATTER TEST RESULTS (RF) ............................................................................ 14 6.1 CONDUCTED EMISSION AT AC POWER LINE ...................................................................................... 14 6.1.1 Test Specification .............................................................................................................. 14 6.1.2 E.U.T. Operation ................................................................................................................ 14 6.1.3 Test Setup Diagram ........................................................................................................... 14 6.1.4 Test Data ........................................................................................................................... 14 6.2 20DB BANDWIDTH........................................................................................................................... 17 6.2.1 Test Specification .............................................................................................................. 17 6.2.2 E.U.T. Operation ................................................................................................................ 17 6.2.3 Test Setup Diagram ........................................................................................................... 18 6.2.4 Test Data ..........................................................................................................................…

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2.4GHz2012ChipAntenna:RANT2012F245X5 Dimension(mm) L2.05+-0.15 W1.20+-0.15 T0.65+-0.10 No.TerminalName 1Feeding/GNG 2GND Application: WLAN,802.11b/g,Bluetooth,WLAN,etc... Features SMD,highreliability,ultraImpact,Omni-directional... PartnumberInformation RANT2012F245X5 (A)(B)(C)(D)(E)(F) (A)ProductTypeChipAntenna (B)SizeCode2.0x1.2mm(+-0.2mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=5 ElectricalSpecification WorkingFrequencyRange2400~2484MHz Bandwidth84(Min.) PeakGain1.7dBi(Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40~85 °C ResistancetoSolderingHeats 10sec.(@280°C) TerminationNi/Au(Leadless) ThespecificationisdefinedonEVB. DimensionandTerminalConfiguration 咏成國際科技有限公司電話:13530576606 RAINInternationalTechnologyCo.,Ltd. 2.4GHz2012ChipAntenna:RANT2012F245X5 EvaluationBoardReference PCBDimensionAntennaLayoutReference Unit:mm ElectricalCharacteristics ReturnLoss ReturnLoss&Radiation 1 Frequency(MHz) S11(dB) 2400-10.77 2450-24.81 2484-10.243 Radiation Z Y X 2400MHz2450MHz Efficiency70.56%75.25% 2.4GHz2012ChipAntenna:RANT2012F245X5 TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 20127”5K/Reel 9.0±0.5 60±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTDP PaperType2012 1.50±0.202.30±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.101.57±0.104.0±0.1 2.4GHz2012ChipAntenna:RANT2012F245X5 ReliabilityTable TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°C. Preheatingtime:1~2min. Soldertemperature:260±5°C. Dippingtime:5±0.5s NoVisibleDamage.IEC60384-21/22 4.10 Vibration5g'sfor20min.,12cycleseachof3orientations Note:Use8"X5"PCB.031"thick7securepointson,onelong sideand2securepointsatcornersofoppositesides.Parts mountedwithin2"fromanysecurepoint.Testfrom10-2000 Hz. NoVisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksineachdirectionshallbeappliedalongthethree mutuallyperpendicularaxesofthetestspecimen(18shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4ft/s Waveform:Half-sine NoVisibleDamage.MIL-STD-202 Method213 Humidity Bias 1.Humidity:85%R.H.,Temperature:85±2°C. 2.Time:500±24hours. 3.Measurementat24±2hrsaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 Method106 2.4GHz2012ChipAntenna:RANT2012F245X5 2.4GHz2012ChipAntenna:RANT2012F245X5 _ Board Flex (SMD) 1.Mountingmethod: IR-Reflow.PCBSize(L:100×W:40×T:1.6mm) 2.Applytheloadindirectionofthearrowuntilbendingreaches 2mm. NoVisibleDamage.AEC-Q200 005 AdhesionForceof1.8Kgfor60seconds.NoVisibleDamage Magnificationof20Xor greatermaybeemployed forinspectionofthe mechanicalintegrityofthe devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Anyapplicablemethodusingx10magnification,micrometers, calipers,gauges,contourprojectors,orothermeasuring equipment,capableofdeterminingtheactualspecimen dimensions. Inaccordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 12020/10/15NewDatasheet