2A6SW-NT18True Wireless Earbuds

NO. FunctionsTest conditionTest StepsVoice promptLED indicatorExpected result Earbuds are in charging caseopen the charging case and take them out Earbudsareoutofchargingcaseandthey have been powered off long press MFB for 3 seconds 2 Power offEarbuds are out of charging casePut the earbuds into the charging casepower offWhite LED is on for 2 secondspower off 3 Pair timeoutearbuds are in pairing mode ifmorethan3minutes,earbudshaveno connectedwithanydevices,earbudswill power off automatically Power_OffWhite LED is on for 2 secondspower off 5 Pairingpower on earbuds\pairing White and Green lights will start flashing alternately with the voice pairing 14 Callingearbuds are in connected mode/ring tone/ 15 AnswerRing modeDouble click MFBNA/Answer 16 End calltalking modeDouble click MFB/End call 17 Reject callRing modeLong press MFB for 2 seconds/Reject call 18 Cancel callEarbuds are in outgoing call modeDouble click MFB/Cancel call 19 SiriConnected/MusicClick MFB for 3 times/ 20 Play/Pausemusic modeDouble Click left/right MFBNA/ 21 Volume Upearbuds are on music modeClick right earbud MFB 1 time//Volume Up 22 Volume Downearbuds are on music modeClick left earbud MFB 1 time//Volume Down 23 Next Songearbuds are on music modeLong press right earbud MFB for 2 seconds//Next Song 24 Last Songearbuds are on music modeLong press left earbud MFB for 2 seconds//Last Song 25 ANCearbuds are connected/music/talk modeClick Left/Right earbud MFB 3 timeANC ON/OFF, Ambient sound mode 26 Pairing nameNT18 NT18CB UI 1 Power onpower onGreen LED is on for 1.5 secondspower on Finish factory reset Tone Tone 10 Factory reset The earbuds of Master and slave are connected, but not connected with phone or any Greentooth device Click the MFB of both earbuds for 5 timesTone White and Green lights is on for 2 seocnds 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. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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 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 communications. 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.

Model difference letter Product Name:True Wireless Earbuds Mode No. : NT18 FCC ID:2A6SW-NT18 The product have left and right earbuds, left and right earbuds are elect rically identical. <Signature> Name ： Yulan wen Title： N/A Company ： SMARTSOUND TECHNOLOGY CO.,LTD

Dec.02,2022 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 AuthoritytoActasAgent Onourbehalf,IappointBlueAsiaofTechnicalServices(Shenzhen)Co.,Ltd./ BuildingC,No.107,ShihuanRoad,ShiyanSub-District,BaoanDistrict,Shenzhen, GuangdongProvince,China(NameofAgentcompanynameandaddress)toactasouragent inthepreparationofthisapplicationforequipmentcertification.Icertifythatsubmitted documentsproperlydescribethedeviceorsystemforwhichequipmentcertificationissought. Ialsocertifythateachunitmanufactured,importedormarketed,asdefinedintheFederal CommunicationsCommission’sregulationswillhaveaffixedtoitalabelidenticaltothat submittedforapprovalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonourbehalf,I acknowledgethatallresponsibilityforcomplyingwiththetermsandconditionsforcertification, stillresideswithSMARTSOUNDTECHNOLOGYCO.,LTD，Room701,28XinhongRoad,Lincun,Tangxia Town，DongguanCity,Guangdong(ApplicantNameandaddress) <Signature> Name ：Yulanwen Title ： N/A Company：SMARTSOUNDTECHNOLOGYCO.,LTD

Dec.02,2022 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2A6SW-NT18 ProductName:TrueWirelessEarbuds RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommissionsrules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: (Listherethedocumentsforwhichyouareseekingconfidentiality–forexample...) Schematics Blockdiagram  Operationdescription Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. <Signature> Name：Yulanwen Title：N/A Company ：SMARTSOUNDTECHNOLOGYCO.,LTD

深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 1 OF 12 3.2X1.6X0.5 (mm) WiFi/Bluetooth Ceramic Chip Antenna Engineering Specification 1. Product Number (1)Product Type Chip Antenna (2)Size Code 3.2x1.6x0.5mm (3)Type Code H1 (4)Packing Plastic Packaging (5)Frequency 2.45GHz YF 3216 H1 X 2G45 1 2 3 4 5 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 2 OF 12 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 3.2x1.6x0.5 mm Working Frequency 2400~2500 MHz VSWR 2 Max. Impedance 50  Polarization Linear Polarization Gain Peak 3.5 (typical) dBi Efficiency 78 (typical) % 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 3 OF 12 5-2. Return Loss & VSWR Return Loss (S 11 ) VSWR(S 11 ) 6. Antenna Dimensions & Test Board (unit: mm) a. Antenna Dimensions b. Test Board with Antenna 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 4 OF 12 80 40 Unit: mm 7. Radiation Pattern (80 x 40 mm 2 ground plane) 7-1. 3D Gain Pattern @ 2442 MHz Z X Y 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 5 OF 12 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) 3.3 3.4 3.3 3.4 3.5 3.5 3.4 2.8 2.9 2.6 2.4 Y X Z Y X X Y Z 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 6 OF 12 7-3. 3D Efficiency vs. Frequency 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. Efficiency vs. Frequency 50 60 70 80 90 100 24002410242024302442245024602470248024902500 Frequency(MHz) Efficiency(%) 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 7 OF 12 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 8 OF 12 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 1.5 pF* Murata (0402) ±0.1 pF *Typical reference values which may need to be changed when circuit boards or part vendors are different. 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 TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 9 OF 12 c. Fine tuning element vs. Center frequency 10. Soldering Conditions a. Typical Soldering Profile for Lead-free Process 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 TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 10 OF 12 11. Packing (1) Quantity/Reel: 5000 pcs/Reel: 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H1) Engineering Specification DOCUMENT YF3216H1X2G45 REV. NO. B PAGE 11 OF 12 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Check…

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ProductName: TrueWirelessEarbuds

FCCID:2A6SW-NT18 ProductName:TrueWirelessEarbuds

ProductName: TrueWirelessEarbuds

RFExposureevaluation ProductName: TrueWirelessEarbuds FCCID: 2A6SW-NT18 TestStandard: 47CFRPart15,Part1.1307 47CFRPart15,Part2.1093 KDB447498D04GeneralRFExposureGuidance v01 Accordingto447498D04InterimGeneralRFExposureGuidancev01 Ant gain = 3.5 dBi MAX output power ：2.614dBm@2402MHz ERP=2.614+3.5-2.15=3.964dBm WORSE CASE: 10^0.3964=2.4912mW < 2.715 mW Then SAR evaluation is not required

Page 1 of96 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Add: Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com TEST REPORT Product Name : True Wireless Earbuds Brand Mark : N/A Model No. : NT18 Report Number : BLA-EMC-202210-A7302 FCC ID : 2A6SW-NT18 Date of Sample Receipt : 2022/10/27 Date of Test : 2022/10/27 to 2022/11/8 Date of Issue : 2022/11/8 Test Standard : 47 CFR Part 15, Subpart C 15.247 Test Result : Pass Prepared for: SMARTSOUND TECHNOLOGY CO.,LTD Room 701, 28 Xinhong Road, Lincun, Tangxia Town, Dongguan City, Guangdong, China Prepared by: BlueAsia of Technical Services(Shenzhen) Co.,Ltd. Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China TEL: +86-755-23059481 Compiled by: Review by: Approved by: Date: 2022/11/8 Report No.: BLA-EMC-202210-A7302 Page 2 of 96 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com REPORT REVISE RECORD Version No. Date Description 00 2022/11/8 Original Report No.: BLA-EMC-202210-A7302 Page 3 of 96 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com TABLE OF CONTENTS 1 TEST SUMMARY ........................................................................................................................................5 2 GENERAL INFORMATION .........................................................................................................................6 3 GENERAL DESCRIPTION OF E.U.T. .........................................................................................................6 4 TEST ENVIRONMENT ................................................................................................................................7 5 TEST MODE ................................................................................................................................................7 6 MEASUREMENT UNCERTAINTY ..............................................................................................................7 7 DESCRIPTION OF SUPPORT UNIT...........................................................................................................8 8 LABORATORY LOCATION .........................................................................................................................8 9 TEST INSTRUMENTS LIST ........................................................................................................................9 10 ANTENNA REQUIREMENT ...................................................................................................................... 11 10.1 CONCLUSION ....................................................................................................................................................... 11 11 CONDUCTED SPURIOUS EMISSIONS .................................................................................................. 12 11.1 LIMITS .............................................................................................................................................................. 12 11.2 BLOCK DIAGRAM OF TEST SETUP ..................................................................................................................... 12 11.3 TEST DATA .......................................................................................................................................................... 13 12 20DB BANDWIDTH .................................................................................................................................. 14 12.1 BLOCK DIAGRAM OF TEST SETUP ..................................................................................................................... 14 12.2 TEST DATA .......................................................................................................................................................... 14 13 CONDUCTED PEAK OUTPUT POWER ................................................................................................. 15 13.1 LIMITS .............................................................................................................................................................. 15 13.2 BLOCK DIAGRAM OF TEST SETUP ..................................................................................................................... 15 13.3 TEST DATA .......................................................................................................................................................... 16 14 CONDUCTED EMISSIONS AT AC POWER LINE (150KHZ-30MHZ)..................................................... 17 14.1 LIMITS .............................................................................................................................................................. 17 14.2 BLOCK DIAGRAM OF TEST SETUP ..................................................................................................................... 17 14.3 PROCEDURE ..................................................................................................................................................... 17 14.4 TEST DATA .......................................................................................................................................................... 19 15 RADIATED SPURIOUS EMISSIONS ....................................................................................................... 21 15.1 LIMITS .............................................................................................................................................................. 21 Report No.: BLA-EMC-202210-A7302 Page 4 of 96 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com 15.2 BLOCK DI…

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ProductName: TrueWirelessEarbuds RadiatedSpuriousEmissions ConductedEmissionsatACPowerLine(150kHz-30MHz)