2AXR6-EL228ANC TWS EARBUDS

STARLINE USA INC Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 24, 2024 FCC ID: 2AXR6-EL228 Ref. #1: Attestation Statements Part 2.911(d)(5)(i) Filing STARLINE USA INC 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. Ref. #2: Attestation Statements Part 2.911(d)(5)(ii) Filing STARLINE USA INC 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. Applicant: STARLINE USA INC Address: 3036 ALT BLVD, GRAND ISLAND, New York United States 14072 Contact Person: Mason Lapsker Tel.: 800831-2231 Email: [email protected] Sincerely, Signature:

STARLINE USA INC U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: September 24, 2024 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2AXR6-EL228 STARLINE USA INC (“the applicant”) certifies that, as of the date of the filing of the application, STARLINE USA INC (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for 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. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. STARLINE USA INC ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: STARLINE USA INC FRN: 0030069926 Address: 3036 ALT BLVD, GRAND ISLAND, New York United States 14072 Signature: Contact Person: Mason Lapsker Tel: 800831-2231 Email: [email protected] Applicant Company Name: STARLINE USA INC FRN: 0030069926 Address: 3036 ALT BLVD, GRAND ISLAND, New York United States 14072 Signature: Contact Person: Mason Lapsker Tel: 800831-2231 Email: [email protected]

STARLINE USA INC Date：September 24, 2024 Product Model Number: EL228 FCC ID：2AXR6-EL228 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following: • Testing • Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. By: Mason Lapsker Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: 800831-2231 On behalf of: STARLINE USA INC

STARLINE USA INC Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 26, 2024 Subject; Request for Confidentiality FCC ID: 2AXR6-EL228 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 Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices 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, Signature: Name: Mason Lapsker Title: Manager

SMD Antenna: RANT2012F245C02 Dimension (mm) L2.05+-0.15 W1.20+-0.15 T0.45+-0.10 No.Terminal Name 1Feeding/GNG 2GND Application: WLAN, 802.11b/g, Bluetooth, WLAN, etc... Features SMD, high reliability, ultra Impact, Omni-directional... Part number Information RANT2012F245C02 (A)(B)(C)(D)(E)(F) (A)Product TypeChip Antenna (B) Size Code2.0x1.2mm(+-0.2mm) (C) MaterialHigh K material (D) Frequency2.4 ~ 2.5GHz (E) Feeding modePIFA & Single Feeding (F) Antenna typeType=02 Electrical Specification Working Frequency Range2400 ~2484 MHz Bandwidth84 (Min.) Peak Gain1.85 dBi (Typ.) Impedance50 Ohm Return loss10 dB ( Min) PolarizationLinear Azimuth BeamwidthOmni-directional Operation Temperature( °C )-40 ~85 °C Resistance to Soldering Heats 10sec. ( @ 280°C) TerminationNi / Au (Leadless) The specification is defined on EVB. Dimension and Terminal Configuration 咏成國際科技有限公司 電話: 13530576606 RAIN Int ernational Technology Co., Ltd. TEL :13530576606 709, Building F, Yuxing Science and Technology Industrial Park, Nanchang Third Industrial Zone, Nanchang Community, Xixiang Street, Baoan District, Shenzhen SMD Antenna: RANT2012F245C02 Evaluation Board Reference PCB DimensionAntennaLayoutReference Unit :mm ElectricalCharacteristics ReturnLoss ReturnLoss & Radiation 1 Frequency(MHz) S11 (dB) 2400-10.77 2450-24.81 2484-10.243 Radiation Z Y X 2400MHz2450MHz2500MHz Efficiency70.56%75.25%71.01% SMD Antenna: RANT2012F245C02 Taping Specifications Reel and TapingSpecification Reel Specification TYPESIZEABCD 20127”5K/Reel 9.0 ±0.5 60 ±213.5 ±0.5178 ±2 TappingSpecification PackagingTypeABWEFGHTDP Paper Type2012 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 SMD Antenna: RANT2012F245C02 Reliability Table Test ItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfillthe electrical specification UserSpec. Thermal Shock 1. Preconditioning: 50 ± 10°C/ 1 hr , then keepfor 24 ± 1 hrs at roomtemp. 2. Initialmeasure:Spec:refer Initialspec. 3. Rapidchangeof temperaturetest: -30°Cto +85°C; 100 cycles; 15 minutesat Lowercategorytemperature; 15 minutesat Uppercategorytemperature. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 107 Temperature Cycling 1. Initialmeasure:Spec:refer Initialspec. 2. 100 Cycles(-30°Cto +85°C), SoakMode=1(2 Cycle/hours). 3. Measurementat 24 ± 2Hoursafter test condition. No VisibleDamage. Fulfillthe electrical specification. JESD22 JA104 High Temperature Exposure 1. Initialmeasure:Spec:refer Initialspec. 2. Unpowered;500hours@ T=+85°C. 3. Measurementat 24 ± 2 hoursafter test. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 108 Low Temperature Storage 1. Initialmeasure:Spec:refer Initialspec. 2. Unpowered:500hours@ T= -30°C. 3. Measurementat 24 ± 2 hoursafter test. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 108 Solderability (SMD BottomSide) Dippingmethod: a. Temperature:235 ±5°C b. Dippingtime:3 ± 0.5s The soldershouldcover over 95% of the critical area of bottomside. IEC 60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150 ± 10 °C. Preheatingtime:1~2 min. Soldertemperature:260 ± 5°C. Dippingtime:5 ± 0.5s No VisibleDamage.IEC 60384-21/22 4.10 Vibration5g's for 20 min.,12 cycleseachof 3 orientations Note:Use 8"X5"PCB .031"thick 7 securepointson, one long side and 2 securepointsat cornersof oppositesides.Parts mountedwithin2" from any securepoint.Test from 10-2000 Hz. No VisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksin eachdirectionshall be appliedalongthe three mutuallyperpendicularaxesof the test specimen(18 shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4 ft/s Waveform:Half-sine No VisibleDamage.MIL-STD-202 Method213 Humidity Bias 1. Humidity:85% R.H.,Temperature:85 ± 2°C. 2. Time:500 ± 24 hours. 3. Measurementat 24 ± 2hrs after testcondition. No VisibleDamage. Fulfillthe electrical specification. MIL-STD-202 Method106 SMD Antenna: RANT2012F245C02 _ Board Flex (SMD) 1. Mountingmethod: IR-Reflow.PCB Size (L:100× W:40× T:1.6mm) 2. Applythe load in directionof the arrowuntil bendingreaches 2 mm. No VisibleDamage.AEC-Q200 005 AdhesionForceof 1.8Kgfor 60 seconds.No VisibleDamage Magnificationof 20X or greatermay be employed for inspectionof the mechanicalintegrityof the devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Any applicablemethodusingx10 magnification,micrometers, calipers,gauges,contourprojectors,or othermeasuring equipment,capableof determiningthe actualspecimen dimensions. In accordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 120 20 /10/15New Datasheet

Report No: SSP24090069-1E FCC ID: 2AXR6-EL228 Annex of Test Report Annex A. EUT External Photos EUT View 1 EUT View 2 Report No: SSP24090069-1E FCC ID: 2AXR6-EL228 Annex of Test Report EUT View 3 EUT View 4 Report No: SSP24090069-1E FCC ID: 2AXR6-EL228 Annex of Test Report EUT View 5 EUT View 6 Report No: SSP24090069-1E FCC ID: 2AXR6-EL228 Annex of Test Report EUT View 7

Report No: SSP24090069-1E FCC ID: 2AXR6-EL228 Annex of Test Report Annex D. Label and Information FCC Label Sample FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location

FCC ID: 2AXR6-EL228 RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093，Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison Here, The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. For BR+EDR Max Conducted Power(dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Max Power(mW) Frequency(MHz) Min. distance(mm) Calc. thresholds limit 2.31 2(±1) 3 2 2402 5 0.6199354 3.0 So a SAR test is not required

CCUT Testing & Certification Report No: SSP24090069-1E FCC Test Report Page 1 of 47 FCC TEST REPORT FCC ID: 2AXR6-EL228 Report No. : SSP24090069-1E Applicant : STARLINE USA INC Product Name : ANC TWS EARBUDS Model Name : EL228 Test Standard : FCC Part 15.247 Date of Issue : 2024-09-20 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. CCUT Testing & Certification Report No: SSP24090069-1E FCC Test Report Page 2 of 47 Test Report Basic Information Applicant..................................: STARLINE USA INC Address of Applicant...............: 3036 ALT BLVD, GRAND ISLAND, New York United States 14072 Manufacturer..........................: Ningbo Xinze Electrical Appliance Co., Ltd. Address of Manufacturer........: No.6, District D, 3 Floor, Building A, Yicheng Industrial Tiegang Village, Bao'an, 518102 Shenzhen, Guangdong Sheng, China Product Name.........................: ANC TWS EARBUDS Brand Name.............................: - Main Model..............................: EL228 Series Models..........................: - Test Standard..........................: FCC Part 15 Subpart C ANSI C63.4-2014 ANSI C63.10-2013 Date of Test .............................: 2024-09-18 to 2024-09-19 Test Result...............................: PASS Tested By ................................: (Colin Chen) Reviewed By............................: (Lieber Ouyang) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. CCUT Testing & Certification Report No: SSP24090069-1E FCC Test Report Page 3 of 47 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................6 1.3 Compliance Standards ...........................................................................................................................................7 1.4 Test Facilities ........................................................................................................................................................7 1.5 List of Measurement Instruments ..........................................................................................................................8 1.6 Measurement Uncertainty .....................................................................................................................................8 2. Summary of Test Results .............................................................................................................................................9 3. Antenna Requirement ............................................................................................................................................... 10 3.1 Standard and Limit.............................................................................................................................................. 10 3.2 Test Result .......................................................................................................................................................... 10 4. Conducted Emissions ................................................................................................................................................ 11 4.1 Standard and Limit.............................................................................................................................................. 11 4.2 Test Procedure.................................................................................................................................................... 11 4.3 Test Data and Results .......................................................................................................................................... 12 5. Radiated Emissions ................................................................................................................................................... 15 5.1 Standard and Limit.............................................................................................................................................. 15 5.2 Test Procedure.................................................................................................................................................... 15 5.3 Test Data and Results .......................................................................................................................................... 17 6. Band-edge Emissions(Radiated) ............................................................................................................................ 21 6.1 Standard and Limit.............................................................................................................................................. 21 6.2 Test Procedure.................................................................................................................................................... 21 6.3 Test Data and Results .......................................................................................................................................... 21 7. Freq…

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