2AHN6-AUBE224TWS Glow in the Dark-ASST

Bytech NY Inc. 2585 West 13th Street, Brooklyn NY 11223, New York, United States Tel: 718-449-3700 | Fax: 718-449-2488 E-mail: [email protected] Date: 10/14/2022 To: FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 We, Bytech NY Inc. hereby declare that： Product Name: TWS Glow in the Dark-ASST Model NO.: BY-AU-BE-224-AC FCC ID: 2AHN6-AUBE224 For BT Mode: BLE 1M/2M are disable by software For Below are activated: Bluetooth BDR(GFSK) , EDR(π/4‐DQPSK), EDR(8DPSK) Except for the manufacturer, the end user does not have any capability to modify/change the RF parameters. We acknowledge that it is the manufacturer’s responsibility to provide the radio configurations to ensure compliance with Commission’s rules. Sincerely Yours, Signature: Printed Name: Soli Mizrahi Title: President

Bytech NY Inc. 2585 West 13th Street, Brooklyn NY 11223, New York, United States Tel: 718-449-3700 | Fax: 718-449-2488 E-mail: [email protected] Date: 10/14/2022 To: FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Left & right Ear buds Declaration letter To whom it may concern: We, Bytech NY Inc., hereby declare that we have a product named as TWS Glow in the Dark-ASST (Model: BY-AU-BE-224-AC; FCC ID: 2AHN6-AUBE224), was tested by ATC (Shenzhen), which has left earphone and right earphone. We would like to declare that the product has two units Earbud which are electrically identical. We confirm that all information above is true, and we’ll be responsible for all the consequences. Sincerely Yours, Signature: Printed Name: Soli Mizrahi Title: President

1 2 3 4 BCD 6 5 4 3 2 1 D CBA AB5616 26MHz ANTBT-RF VBATCharge KEY Touch input MIC 2402-2480MHz A

Bytech NY Inc. 2585 West 13th Street, Brooklyn NY 11223, New York, United States Tel: 718-449-3700 | Fax: 718-449-2488 E-mail: [email protected] FCC Authorization 10/14/2022 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We, Bytech NY Inc., the undersigned, hereby authorize Shenzhen Accurate Technology Co., Ltd to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Shenzhen Accurate Technology Co., Ltd on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature: Printed Name: Soli Mizrahi Title: President

Bytech NY Inc. 2585 West 13th Street,Brooklyn NY 11223, NewYork, United States Tel: 718-449-3700 |Fax: 718-449-2488 E-mail: [email protected] 2022-10-14 FCC Certification No. Cover Letter We, Bytech NY Inc., hereby submit justification for placing the FCC certification No. in the associated user’s manual and charging case. According to the FCC regulation, the FCC certification No. should be printed on the ear buds, but as the ear buds are too small to print the label （FCC ID: 2AHN6-AUBE224）, it will be moved to the user manual and charging case. The details are as below: A. Top cover (A): The plastic of the top cover does not provide enough physical space to fit the printing of the FCC ID according to below reference picture. B. Area (B): The plastic of the top cover does not provide enough physical space to fit the printing of the FCC ID according to below reference picture. Conclusion Based on the above description of area A to B, we conclude that the device is unquestionably too small for enabling the FCC ID to be printed onto any surface; we therefore request to move the FCC ID to the User manual and charging case. Sincerely Yours, Signature: Printed Name: Soli Mizrahi Title: President

Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 1 of 10 External Photos Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 2 of 10 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 3 of 10 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 4 of 10 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 5 of 10 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 6 of 10 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 7 of 10 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 8 of 10 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 9 of 10 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 10 of 10

Project No. : SZ3220923-43375E-RF EXHIBITA-FCC ID LABEL AND LOCATION FCC ID Label FCC ID Label Location Information The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the time purchase (Labeling requirements per 2.295)

Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 1 of 8 Internal Photos Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 2 of 8 Antenna Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 3 of 8 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 4 of 8 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 5 of 8 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 6 of 8 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 7 of 8 Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 8 of 8

Circuit description Battery(3.7V)provides energy for the Bluetooth chip(AB5616A); Crystal oscillator(26MHz) provides the clock signal for the Bluetooth chip. Prod ucts is in broadcasting state when stand by, broadcasting Bluetooth signals a ccording to a certain time interval. Bluetooth signals get through a matching circuit, and the n transmitted to the space through the antenna(2402MHz-2408MHz). When th e product is connected, the product can be in two-way communication with mobile phones, and then the phone's Bluetooth module sends Bluetooth signals into space, the product receives the Bluetooth signal through an antenna, transmission to the Bluetooth chip via matching circuit. ModulationTechnique

1234 A B C D 4321 D C B A MIC LED KEY POWERupDate Earphone V D D B T 1 0 V D D B T 7 P W R K E Y 8 LX 5 D G N D 6 VBAT 4 VUSB 2 D A C L 1 8 A D C 1 0 / M I C / P F 2 1 6 BT_OSCI 11 BT_OSCO 12 B T _ A N T 9 VDDIO 3 V D D D A C 1 9 AGND 1 RFGND 0 V C M B U F 1 7 V D D P A 2 0 ADC6/PB4 13 ADC5/PB3 14 ADC2/PA7 15 U1 AB5616A QFN20 3*3 Y1 26MHZ OSCO OSCI upDate1 V D D D A C C 1 0 1 0 5 D A C L # D A C L M I C I N C14 475 V D D B T P W R K E Y C2 NC C4 0R C5 2.2pF C3 105 VUSB VDDIO VBATC12225 C13NC C11105 L1 10uH V D D B T BLUE_LED LED2RED LED1BLUE CHRG_LED BLUE_LED CHRG_LED PWRKEY LOUT1 LOUT#1 DACL# DACL C8 NC C1 NC MICIN + M1 VUSB VBAT VUSB1 GND1 R1 5pF 4013 3216 ANT1 Touch PAD1 C16 10pF C15 10pF C6 10pF B- B+

Note: This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “★”. Shenzhen Accurate Technology Co., Ltd. is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect test results are marked with an asterisk ’*’. Customer model name, addresses, names, trademarks etc. are not considered data. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. Shenzhen Accurate Technology Co., Ltd. 1/F., Building A, Changyuan New Material Port, Science & Industry Park, Nanshan District, Shenzhen, Guangdong, P.R. China Tel: +86 755-26503290 Fax: +86 755-26503396 Web: www.atc-lab.com Version 11: 2021-11-09 Page 1 of 59 FCC-BT TEST REPORT Applicant Name : Bytech NY lnc. Address : 2585 West 13th Street Brooklyn NY 11223 USA Report Number : SZ3220923-43375E-RF FCC ID: 2AHN6-AUBE224 Test Standard (s) FCC PART 15.247 Sample Description Product Type: TWS Glow in the Dark-ASST Model No.: BY-AU-BE-224-AC Date Received: 2022-09-23 Date of Test: 2022-09-28 Report Date: 2022-10-08 Test Result: Pass* * In the configuration tested, the EUT complied with the standards above. Prepared and Checked By: Approved By: Jeff Jiang Candy Li EMC Engineer EMC Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: SZ3220923-43375E-RF Version 11: 2021-11-09 Page 2 of 59 FCC-BT TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 OBJECTIVE ................................................................................................................................................................... 4 TEST METHODOLOGY .................................................................................................................................................. 4 MEASUREMENT UNCERTAINTY .................................................................................................................................... 5 TEST FACILITY ............................................................................................................................................................. 5 SYSTEM TEST CONFIGURATION .......................................................................................................................... 6 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 6 EUT EXERCISE SOFTWARE .......................................................................................................................................... 6 SPECIAL ACCESSORIES ................................................................................................................................................. 6 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 6 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 6 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 7 SUMMARY OF TEST RESULTS ............................................................................................................................... 8 TEST EQUIPMENT LIST ........................................................................................................................................... 9 FCC§15.247 (i), §1.1307 (b) – RF EXPOSURE ......................................................................................................... 10 APPLICABLE STANDARD ............................................................................................................................................ 10 TEST RESULT ............................................................................................................................................................. 10 FCC §15.203 – ANTENNA REQUIREMENT .......................................................................................................... 11 APPLICABLE STANDARD ............................................................................................................................................ 11 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 11 FCC §15.205, §15.209 & §15.247(d) – RADIATED EMISSIONS ........................................................................... 12 APPLICABLE STANDARD ............................................................................................................................................ 12 EUT SETUP ................................................................................................................................................................ 12 EMI TEST RECEIVER & SPECTRUM ANALYZER SETUP .............................................................................................. 13 TEST PROCEDURE ...................................................................................................................................................... 13 FACTOR & MARGIN CALCULATION ........................................................................................................................... 13 TEST DATA ...................…

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PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 产品规格承认书 SPECIFICATIONS 客户: CUSTOMER: 产品名称: DESCRIPTION:Bipolarantenna 客户型号: CUSTOMERMODELNo: 产品型号: PRODUCTMODELNo:PBX3216MP01 日期: DATE: 确认签字,盖章后请返回承认书一份 PLEASERETURNTOUSONECOPYOF“SPECIFICATIONFORAPPROVAL” WITHYOURAPPROVEDSIGNATURES ApprovedLiuFeiAuditLiuFeiMakingLiuXiaoMei CustomerAcknowledgesSignature Date PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 PBX3216MP01Specification OperatingTemp.:-40°C~+85°C 1. FEATURES : ●Lightweight,compact ●Widebandwidth,lowcost ●Built-inantennawithhighgain 2. APPLICATIONS : ●Bluetooth,WirelessLAN,MobileTV ●HomeRFSystem,etc 3.PRODUCTIDENTIFICATION (1)(2)(3) (1)Producttype:MultilayerchipAntenna (2)CenterFrequency:2450MHz (3)ExternalDimensions(L×W)(mm):3.2*1.6 4.SHAPEANDDIMENSIONS: LWHA 3.2±0.21.6±0.2 0.52 ± 0.10.4 ± 0.1 CH IP45 032 2 16 PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 Testplatereferencesize： Company：mm PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 Holepunchingreferencediagram APPLICATIONGUIDE 5.SPECIFICATIONS: *Testcondition:Testboardsize90*40mm Matchingcircuit:Pimatchingcircuitwillberequired PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 6.ElectricalCharacteristics: Returnloss Standingwaveratio MarkFrequencyVSWR 12400MHz1.513 22440MHz1.068 32480MHz1.464 PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 RadiationPattern TheGainpatternismeasuredinFAR-fieldchamber.DUTisplacedonthetableofrotator,a standardhornantennaandVectorNetworkAnalyzerisusedtocollectdata. ◎Efficiency ◎Maximumgain PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 ◎3DGainPattern(2400MHz) ◎3DGainPattern(2440MHz) ◎3DGainPattern(2480MHz) PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 7.EnvironmentalCharacteristics (1)ReliabilityTest (2)StorageCondition (a)Atwarehouse: Thetemperatureshouldbewithin0~30°Candhumidityshouldbelessthan60%RH. Theproductshouldbeusedwithin1yearfromthetimeofdelivery. (b)Onboard: Thetemperatureshouldbewithin-40~85°Candhumidityshouldbelessthan85%RH. (3)OperatingTemperatureRange Operatingtemperaturerange:-40 °C to+105 °C . PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 8.RecommendedReflowSoldering (1)SolderingGunProcedure Notethefollows,incaseofusingsoldergunforreplacement. (a)Thetiptemperaturemustbelessthan350 ° Cfortheperiodwithin3secondsby usingsolderinggununder30W. (b)Thesolderingguntipshallnottouchthisproductdirectly. (2)SolderingVolume Notethatexcessofsolderingvolumewilleasilygetcrackthebodyofthisproduct. PengBanXingYeShenZhenTechnologyCo.,Ltd UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± 深圳市朋伴兴业科技有限公司 SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICA…

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Shenzhen Accurate Technology Co., Ltd. Project No.: SZ3220923-43375E-RF Page 1 of 1 Photo of Radiated Emission Measurement Below 1GHz Photo of Radiated Emission Measurement Above 1GHz