2BEBP-LK56Wireless Earbuds

Beijing Netac Innovation Technology Development Co.Ltd Section 2.911(d)(5)(i) Certification – EquipmentType Company name: Beijing Netac Innovation Technology Development Co.Ltd Address: 138-1-3 NO.20 YONG AN ROAD MEN TOU GOU DISTRICT BEIJING CHINA Product Name: Wireless Earbuds FCC ID: 2BEBP-LK56 Model(s): LK56 2.911(d)(5)(i) EquipmentType We, [ Beijing Netac Innovation Technology Development Co.Ltd] (“the applicant”) certify that the equipment for which authorization is sought through certification is not: • Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules. • Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: dongdong xie Date: 7/1/2024 Title and Company name: manager / Beijing Netac Innovation Technology Development Co.Ltd NOTE 1 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the 2.911 (d)(5)(i) Equipment Type Attestation v1.2

Beijing Netac Innovation Technology Development Co.Ltd Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: Beijing Netac Innovation Technology Development Co.Ltd Address: B 138-1-3 NO.20 YONG AN ROAD MEN TOU GOU DISTRICT BEIJING CHINA Product Name: Wireless Earbuds FCC ID: 2BEBP-LK56 Model(s): LK56 2.911(d)(5)(ii) Applicant filing We, [ Beijing Netac Innovation Technology Development Co.Ltd] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 ,established pursuant to §1.50002 of this chapter,as an entity producing coveredcommunications equipment. The applicant is not a named entity or any of its subsidiaries or affiliates. Yours sincerely, Name: dongdong xie Date: 7/2/2024 Title and Company name: manager / Beijing Netac Innovation Technology Development Co.Ltd NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 2.911 (d)(5)(ii) Applicant Attestation v1.3 Beijing Netac Innovation Technology Development Co.Ltd https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the 2.911 (d)(5)(ii) Applicant Attestation v1.3

Beijing Netac Innovation Technology Development Co.Ltd Date: July 2, 2024 FCC ID:2BEBP-LK56 Model Number: LK56 To: Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21048 To Whom It May Concern, We, Beijing Netac Innovation Technology Development Co.Ltd declare that this EUT (FCC ID: 2BEBP-LK56) will conduct FCC compliance testing, the SDOC part recognized test lab(Shenzhen NTEK Testing Technology Co., Ltd.( ShenZhen Lab.). 1/F, Building E, Fenda Science Park, Sanwei Community,Xixiang Street Bao’an District, Shenzhen 518126 P.R. China) Please contact me if you have any question. Sincerely, (Signed) Name / Title:dongdong xie/ manager Company: Beijing Netac Innovation Technology Development Co.Ltd Address: 138-1-3 NO.20 YONG AN ROAD MEN TOU GOU DISTRICT BEIJING CHINA

THREE STONES MEDIA LLC U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: 7/2/2024 Ref: Attestation Statement – Part2.911(d)(7) filing FCC ID ：2BEBP-LK56 Beijing Netac Innovation Technology Development Co.Ltd(“the applicant”) certifies that, as of the date of the filing of the application, THREE STONES MEDIA LLC(“the agent”) is our designated U.S. agent for service of process for the abovereference FCC ID. The applicant accepts to maintain an agent for service of process in the United States forno less than two year after either the grantee has permanently terminated all marketing and importation of theapplicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicialproceeding involving the equipment, whichever is later. The applicant further acknowledges it is ourresponsibility to inform the FCC whenever the agent information changes. THREE STONES MEDIA LLC ("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: THREE STONES MEDIA LLC FRN: 0033401761 GC: 2A99E Address: 1200 Broadway St. APT 329, Los Angeles, CA90015 Signature: Contact Person: Sijie Zhang Tel: +1 267 909 3692 Email: [email protected] Applicant Signature: Company Name: Beijing Netac Innovation Technology Development Co.Ltd Address: 138-1-3 NO.20 YONG AN ROAD MEN TOU GOU DISTRICTBEIJING CHINA GC: 2BEBP FRN: 0034670349 Contact Person: dong dong xie Tel: 13612842510 Email: [email protected]

(Beijing Netac Innovation Technology Development Co.Ltd) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Date: 7/2/2024 SUBJECT: FCC Application for FCC ID: 2BEBP-LK56 To Whom It May Concern: We, the undersigned, hereby authorize Alex Li at Shenzhen NTEK Testing Technology Co., Ltd. on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Shenzhen NTEK Testing Technology Co., Ltd. on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, (signature) (printed name): dongdong xie Z:\NTEK\电磁兼容部\RF项目组\RF项目\2024\4月\S24043000309001 北京朗科创新技术 TWS耳机(EDR) LK56 FCC ID\6. Submission\Letter\FCC POA Letter.docx

<Beijing Netac Innovation Technology Development Co.Ltd> Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 7/2/2024 Subject; Request for Confidentiality FCC ID: 2BEBP-LK56 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 Tune up procedure BOM 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 pursuantto 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: dongdong xie Title:manager Email: [email protected]

FCCID:2BEBP-LK56 TheusermanualincludesFCCID. TheequipmentpackagingincludesFCCID.

FCC ID: 2BEBP-LK56 Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. BT: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) SAR test exclusion GFSK 1.492.51.78<50.551213.00YES 1.182.51.78<50.555673.00YES 1.392.51.78<50.560093.00YES π/4- DQPSK 1.8332.00<50.618473.00YES 1.4232.00<50.623473.00YES 1.6732.00<50.628433.00YES BLE(1M) 0.881.51.41<50.437843.00YES 1.1721.58<50.495143.00YES 1.3721.58<50.499183.00YES BLE(2M) 0.901.51.41<50.437843.00YES 1.1921.58<50.495143.00YES 1.4221.58<50.499183.00YES Result calculation SAR Exclusion threshold 2.402 2.441 2.480 2.402 2.441 2.480 2.402 2.440 2.480 2.402 2.440 2.480 1.74 0.72 1.44 2.63 1.53 2.24 -0.56 0.67 1.36 -0.45 0.75 1.52 1.5±1 1.5±1 1.5±1 2±1 2±1 2±1 0.5±1 1±1 1±1 0.5±1 1±1 1±1 Conclusion: For the max result : 0.62843 ≤ 3.0 for 1g SAR, SAR is not required. Signature: Date: 2024-07-09 NAME AND TITLE (Please print or type): Alex li /Manager COMPANY (Please print or type): Shenzhen NTEK Testing Technology Co., Ltd./ 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen P.R. China.

Report No.: S24043000309002 Version.1.3 Page 1 of 60 RADIO TEST REPORT FCC ID: 2BEBP-LK56 Product: Wireless Earbuds Trade Mark: Netac Model No.: LK56 Family Model: N/A Report No.: S24043000309002 Issue Date: May 31. 2024 Prepared for Beijing Netac Innovation Technology Development Co.Ltd 138-1-3 NO.20 YONG AN ROAD MEN TOU GOU DISTRICT BEIJING CHINA Prepared by Shenzhen NTEK Testing Technology Co., Ltd. 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen 518126 P.R. China Tel. 400-800-6106, 0755-2320 0050, 0755-2320 0090 Website: http://www.ntek.org.cn Report No.: S24043000309002 Version.1.3 Page 2 of 60 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION ...................................................................................................................... 3 2 SUMMARY OF TEST RESULTS ......................................................................................................................... 4 3 FACILITIES AND ACCREDITATIONS ............................................................................................................. 5 3.1 FACILITIES..................................................................................................................................................... 5 3.2 LABORATORY ACCREDITATIONS AND LISTINGS ................................................................................. 5 3.3 MEASUREMENT UNCERTAINTY ............................................................................................................... 5 4 GENERAL DESCRIPTION OF EUT .................................................................................................................. 6 5 DESCRIPTION OF TEST MODES ..................................................................................................................... 8 6 SETUP OF EQUIPMENT UNDER TEST ........................................................................................................... 9 6.1 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM ....................................................................... 9 6.2 SUPPORT EQUIPMENT ............................................................................................................................... 10 6.3 EQUIPMENTS LIST FOR ALL TEST ITEMS .............................................................................................. 11 7 TEST REQUIREMENTS .................................................................................................................................... 13 7.1 CONDUCTED EMISSIONS TEST ............................................................................................................... 13 7.2 RADIATED SPURIOUS EMISSION ............................................................................................................ 16 7.3 6DB BANDWIDTH ....................................................................................................................................... 25 7.4 DUTY CYCLE ............................................................................................................................................... 26 7.5 PEAK OUTPUT POWER .............................................................................................................................. 28 7.6 POWER SPECTRAL DENSITY ................................................................................................................... 29 7.7 CONDUCTED BAND EDGE MEASUREMENT......................................................................................... 31 7.8 SPURIOUS RF CONDUCTED EMISSIONS ................................................................................................ 32 7.9 ANTENNA APPLICATION .......................................................................................................................... 33 8 TEST RESULTS ................................................................................................................................................... 34 1M .............................................................................................................................................................................. 34 8.1 MAXIMUM CONDUCTED OUTPUT POWER ....................................................................................................... 34 8.2 -6DB BANDWIDTH .......................................................................................................................................... 36 8.3 OCCUPIED CHANNEL BANDWIDTH .................................................................................................................. 38 8.4 MAXIMUM POWER SPECTRAL DENSITY LEVEL ............................................................................................... 40 8.5 BAND EDGE .................................................................................................................................................... 42 8.6 CONDUCTED RF SPURIOUS EMISSION ............................................................................................................. 44 2M .............................................................................................................................................................................. 48 8.1 MAXIMUM CONDUCTED OUTPUT POWER ....................................................................................................... 48 8.2 -6DB BANDWIDTH .......................................................................................................................................... 50 8.3 OCCUPIED CHANNEL BANDWIDTH .................................................................................................................. 52 8.4 MAXIMUM POWER SPECTRAL DENSITY LEVEL ............................................................................................... 54 8.5 BAND EDGE ........................................................................................…

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2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 １ Application: WLAN,802.11b/g,Bluetooth,WLAN,etc... Features SMD,highreliability,ultraImpact,Omni-directional... PartnumberInformation RANT1608F245C01/04 (A)(B)(C)(D)(E)(F) ElectricalSpecification DimensionandTerminalConfiguration No.TerminalName 1Feeding/GNG 2GND/Feeding (A)ProductTypeChipAntenna (B)SizeCode 1.6x0.8mm( ± 0.1mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=01/04/05 WorkingFrequencyRange2400~2500MHz Bandwidth120MHz(Min.) PeakGain2.7dBi(Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40~85 °C ResistancetoSolderingHeats 10sec.(@280 °C ) TerminationNi/Au(Leadless) Dimension(mm) L 1.60±0.10 W 0.80 ± 0.10 T 0.80 ± 0.10 咏成國際科技有限公司電話 :13530576606 RAINInternationalTechnologyCo.,Ltd.TEL:13530576606 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ２ 1 EvaluationBoardReference 长条板Layout建议参考如下： Toplayer: Bottomlayer: 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ３ 异形Layout建议参考如下： Toplayer: Toplayer: 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ４ ElectricalCharacteristics ReturnLoss&Radiation ELECTRICALCHARACTERISTICSS11 RadiationPattern 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ５ ElectricalCharacteristics 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ６ TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 16087”4K/Reel 4.0±0.5 4.0±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTψDP PaperType1608 1.90±0.203.50±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.10 1.50±0.10 4.0±0.1 2.4GHz1608ChipAntenna: RANT1608F245C01/1608F245C04/1608F245C05 ７ ReliabilityTable TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°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 2.4GHz3216ChipAntenna: RANT1608F245C01/RANT1608F245C04/1608F245C05 _ ８ 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 12019/03/01NewDatasheet 22020/02/22Add2Dradiationcharacteristic