2A86Y-TG-337Portable Wireless Speaker,Bluetooth Speaker

Warning 6 6 tatement 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. Any 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. This equipment complies with FCC radiation exposure limits set forth for anuncontrolled environment.

Shenzhen chengtai electronic and technology co.,LTD (2024-06-12) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID:2A86Y-TG-337) Shenzhen chengtai electronic and technology co.,LTD 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. Sincerely, (Applicant signature): (Applicant printed name): Fang Ruan Shenzhen chengtai electronic and technology co.,LTD (2024-06-12) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID:2A86Y-TG-337) Shenzhen chengtai electronic and technology co.,LTD 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. Sincerely, (Applicant signature): (Applicant printed name): Fang Ruan

Attestation Statements (12-06-2024) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID:2A86Y-TG-337) (Shenzhen chengtai electronic and technology co.,LTD), the undersigned, hereby authorize GSS SERVICE INC to act as our designated U.S. agent for service of process, (Shenzhen chengtai electronic and technology co.,LTD) accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. GSS SERVICE INC accepts the responsibility to act as designated U.S. agent for service of process. Applicant Information： Company Name: Shenzhen chengtai electronic and technology co.,LTD Contact Name: Fang Ruan Address: 6thFloor,BuildingC,QinyuIndustrialZone,Sanwei,Sanwei Community,Hangcheng Street,Baoan District,Shenzhen FRN: 0033044058 Telephone No: 17093468875 Email: [email protected] Signature [Fang Ruan] U.S.AgentInformation: CompanyName:GSSSERVICEINC Address:6547NAcademyBlvd#2266ColoradoSpringsCOLORADO80918UnitedStates FRN:0033402082 ContactName:MichouxLogan TelephoneNo:001-949-2990192 Email:[email protected] Signature [MichouxLogan]

Shenzhen chengtai electronic and technology co.,LTD Agent Authorization Letter (2024/06/12) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen ZKT Technology Co., Ltd.) 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). This agreement expires one year from the current date. Sincerely, Client’s signature : Client’s name / title : Fang Ruan/ Manager Contact information / address: 6th Floor, Building C, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen

Shenzhen chengtai electronic and technology co.,LTD Family models declaration letter. 2024-06-12 We Shenzhen chengtai electronic and technology co.,LTD Of 6thFloor,BuildingC,QinyuIndustrialZone,Sanwei,Sanwei Community,Hangcheng Street,Baoan District,Shenzhen Product: Portable Wireless Speaker,Bluetooth Speaker Model Name: TG-337 Serial Model: TG-339,TG-363,TG-394,TG519,TG517,TG-145,TG-441,TG-442,TG-443,TG-444 ,TG-445,TG-445MINI,TG-446,TG-447,TG-448,TG-449,TG-294C All the model are the same circuit and RF module,except model names. Thanks Sincerely, Signature Name: Fang Ruan Date: 2024-06-12 Title: Manager

Shenzhen chengtai electronic and technology co.,LTD Long Term Confidentiality Request Letter (2024-06-12) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR(Portable Wireless Speaker,Bluetooth Speaker / TG-337,TG-339,TG-363,TG-394,TG519,TG517,TG-145,TG-441,TG- 442,TG-443,TG-444,TG-445,TG-445MINI,TG-446,TG-447,TG-448,TG-449,TG-294C / FCC ID:2A86Y-TG-337) To Whom It May Concern: - This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature : Client’s name / title : Fang Ruan / Manager Contact information / address: 6th Floor, Building C, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen

2cm Model: TG-337 FCC ID: 2A86Y-TG-337 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 causeundesired operation. Label Location 1cm

TX ANT

FCC ID:2A86Y-TG-337 RF EXPOSURE EVALUATION METHOD SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. The 1-g 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 The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. FCC ID:2A86Y-TG-337 For BT mode -- The max. field strength of fundamental frequency is 85.41 dBuv/m. EIRP[dBm] = E[dBμV/m] - 95.2 = 85.41 - 95.2 = -9.79dBm, conducted power = EIRP - ANT gain = -9.79 - (1.2) = -10.99 dBm. The max. tune-up level is -9.99dBm(0.1mw), MPE=0.1 mw / 5mm * √(2.480GHz) = 0.031 < 3.0 (extremity sar), sar exempt. Conclusion: No SAR is required.

Product specification Quick Reference Date Antenna module on the system board Frequenc Range 2400 ~ 2500MHz Ant. Port Input Pwr. (dBm) 0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm) -1.2 (Input pwr – loss pwr) Peak EIRP(dBm) -2 Directivity (dBi) 1 (all direction antenna) Efficiency (dB) 60.2 % Gain (dBi) 1.2 (Peak Gain XZ-plane) Maximum Power (dBm) 1.7 (XY-plane) Minimum Power (dBm) -4(XY-plane) Avg. Power (dBm) -0.5(XY-plane) Input Impendence(ohm) 50 Polarization Type Vertical & Horizontal V . S .W . R < 1.4 All the technical data and information contained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna Gain Gain Table Unit in dBi @2.44GHz XY-plane XZ-plane YZ-plane Efficiency Peak Avg. Peak Avg. Peak Avg. Module Board 1.2 -0.5 1.0 -3.6 1.1 -3.0 4.2 % Retum Loss The Environment of Antenna Radiation Pattem 3D radiation pattern diagram XY-plane XZ-plane YZ-plane Far-field Power Distribution(H+V) on X-Y Plane Plot Peak Gain(H+V)= 1.2dBi; Plot Avg Gain(H+V)= [email protected] Far-field Power Distribution(H+V) on X-Z Plane Plot Peak Gain(H+V)= 1.0dBi; Plot Avg Gain(H+V)= [email protected] Far-field Power Distribution(H+V) on Y-Z Plane Plot Peak Gain(H+V)= 1.1dBi; Plot Avg Gain(H+V)= [email protected]

Project No.:ZKT-240604L6246E Page 1 of 41 FCC TEST REPORT FCC ID:2A86Y-TG-337 Report Number. ................................ : ZKT-240604L6246E Date of Test .................................................June 03 to June 11, 2024 Date of issue .................................... : June 11, 2024 Total number of pages ...................... 41 Test Result ..................................... : PASS Testing Laboratory. ........................... : Shenzhen ZKT Technology Co., Ltd. Address .......................................... : 1/F, No. 101, Building B, No. 6, Tangwei Community Industrial Avenue, Fuhai Street, Bao'an District, Shenzhen, China Applicant's name ............................ : Shenzhen chengtai electronic and technology co.,LTD Address .......................................... : 6thFloor,BuildingC,QinyuIndustrialZone,Sanwei,Sanwei Community,Hangcheng Street,Baoan District,Shenzhen Manufacturer's name ..................... : Shenzhen chengtai electronic and technology co.,LTD Address .......................................... : 6thFloor,BuildingC,QinyuIndustrialZone,Sanwei,Sanwei Community,Hangcheng Street,Baoan District,Shenzhen Test specification: Standard ........................................... : FCC CFR Title 47 Part 15 Subpart C Section 15.249 ANSI C63.10:2013 Test procedure ................................. : / Non-standard test method ............. : N/A Test Report Form No. .................... : TRF-EL-111_V0 Test Report Form(s) Originator .... : ZKT Testing Master TRF .................................... : Dated: 2023-01-05 This device described above has been tested by ZKT, and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of ZKT, this document may be altered or revised by ZKT, personal only, and shall be noted in the revision of the document. Product name ................................... : Portable Wireless Speaker,Bluetooth Speaker Trademark ...................................... : N/A Model/Type reference ...................... : TG-337,TG-339,TG-363,TG-394,TG519,TG517,TG-145,TG-441, TG-442,TG-443,TG-444,TG-445,TG-445MINI,TG-446,TG-447, TG-448,TG-449,TG-294C Battery ............................................... DC 3.7V 1200mAh Ratings ............................................. : DC 5V from adapter AC120V/60Hz or DC3.7V from battery Project No.:ZKT-240604L6246E Page 2 of 41 Testing procedure and testing location: Testing Laboratory ..................................... : Shenzhen ZKT Technology Co., Ltd. Address ...................................................... : 1/F, No. 101, Building B, No. 6, Tangwei Community Industrial Avenue, Fuhai Street, Bao'an District, Shenzhen, China Alen He Tested by (name + signature) .................... : Joe Liu Reviewer (name + signature) ..................... : Lake Xie Approved (name + signature) .................... : Project No.:ZKT-240604L6246E Page 3 of 41 Table of Contents Page 1.VERSION 5 2 SUMMARY OF TEST RESULTS 6 2.1 TEST FACILITY 7 2.2 MEASUREMENT UNCERTAINTY 7 3. GENERAL INFORMATION 8 3.1 GENERAL DESCRIPTION OF EUT 8 3.2 DESCRIPTION OF TEST MODES 9 3.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 10 3.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 11 3.5 EQUIPMENTS LIST FOR ALL TEST ITEMS 12 4. EMC EMISSION TEST 13 4.1 CONDUCTED EMISSION MEASUREMENT 13 4.1.1 POWER LINE CONDUCTED EMISSION LIMITS 13 4.1.2 TEST PROCEDURE 13 4.1.3 DEVIATION FROM TEST STANDARD 13 4.1.4 TEST SETUP 14 4.1.5 EUT OPERATING CONDITIONS 14 4.1.6 TEST RESULTS 15 4.2 RADIATED EMISSION MEASUREMENT 17 4.2.1 RADIATED EMISSION LIMITS 17 4.2.2 TEST PROCEDURE 18 4.2.3 DEVIATION FROM TEST STANDARD 18 4.2.4 TEST SETUP 18 4.2.5 EUT OPERATING CONDITIONS 19 5. BANDWIDTH OF FREQUENCY BAND EDGE 30 5.1 TEST REQUIREMENT: 30 5.2 TEST PROCEDURE 30 5.3 DEVIATION FROM TEST STANDARD 30 5.4 TEST SETUP 30 5.5 EUT OPERATING CONDITIONS 31 5.6 TEST RESULT 32 6. CHANNEL BANDWIDTH 36 6.1 APPLIED PROCEDURES / LIMIT 36 6.2 TEST PROCEDURE 36 6.3 DEVIATION FROM STANDARD 36 6.4 TEST SETUP 36 Project No.:ZKT-240604L6246E Page 4 of 41 Table of Contents Page 6.5 EUT OPERATION CONDITIONS 36 6.6 TSET RESULTS 37 7.ANTENNA REQUIREMENT 40 8. TEST SETUP PHOTO 41 9. EUT CONSTRUCTIONAL DETAILS 41 Project No.:ZKT-240604L6246E Page 5 of 41 1.VERSION Report No. Version Description Approved ZKT-240604L6246E Rev.01 Initial issue of report June 11, 2024 Project No.:ZKT-240604L6246E Page 6 of 41 2 SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.249) , Subpart C Standard Section Test Item Judgment Remark FCC part 15.203 Antenna requirement PASS FCC part 15.207 AC Power Line Conducted Emission PASS FCC part 15.249 Fundamental & Radiated Spurious Emission Measurement PASS FCC part 15.215 (c) 20dB Channel Bandwidth PASS FCC part 15.205 Band Edge PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report Project No.:ZKT-240604L6246E Page 7 of 41 2.1 TEST FACILITY Shenzhen ZKT Technology Co., Ltd. Add. : 1/F, No. 101, Building B, No. 6, Tangwei Community Industrial Avenue, Fuhai Street, Bao'an District, Shenzhen, China FCC Test Firm Registration Number: 692225 Designation Number: CN1299 IC Registered No.: 27033 2.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U，where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2，providing a level of confidence of approximately 95 %。 No. Item Uncertainty 1 Conducted Emission Test ±1.38dB 2 RF power conducted ±0.16dB 3 Spurious emissions conducted ±0.21dB 4 All emissions radiated(<1G) ±4.68dB All emissions radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% Project No.:ZKT-240604L6246E Page 8 of 41 3. GENERAL INFORMATION 3.1 GENERAL DESCRIPTION OF EUT Product Name: Portable Wireless Speaker,Blu…

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Test Setup Photograph Radiated Emissions Test Setup Below 1G Above 1G Conduction Emissions Test Setup