2AJQ7CUBES1wireless speaker

QUEST USA CORP Address: 495 Flatbush Ave, Brooklyn, NY 11225, USA Tel: +1 (718)-975-2586 E-Mail: [email protected] CFR 47 §2.911 (d)(5)(ii) Attestation Letter Attestation Letter Date: 2025-12-31 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(ii) Filing FCC ID: 2AJQ7CUBES1 QUEST USA CORP 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. And our product does not use Kaspersky software information. Sincerely, Signature Printed Name: Ikey Srour Title: Manager

U.S. AGENT LETTER OF ATTESTATION Date: 2025-12-31 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(7) Filing FCC ID: 2AJQ7CUBES1 QUEST USA CORP certifies that, as of the date of the filing of the application, QUEST USA CORP is our designated U.S. agent for service of process for the above referenced FCC ID. QUEST USA CORP 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. QUEST USA CORP accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent and Applicant Information: Name: QUEST USA CORP Address: 495 Flatbush Ave, Brooklyn, NY 11225, USA FRN: 0025872284 Tel.: +1 (718)-975-2586 Email: [email protected] Signed by (printed name): Ikey Srour Signature:

QUEST USA CORP Address: 495 Flatbush Ave, Brooklyn, NY 11225, USA Tel: +1 (718)-975-2586 E-Mail: [email protected] Attestation letter Date: 2025-12-31 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: Our product wireless speaker, Model: DS20852-FB, DS20897-FB, FCC ID: 2AJQ7CUBES1. For marketing purpose, this product only supports BT (GFSK, π/4-DQPSK, 8DPSK). The other functions, bands and modes was disabled to use by manufacturer in the software, the end user has no capability to activate it. Sincerely Yours, Signature: Printed Name: Ikey Srour Title: Manager

QUEST USA CORP Address: 495 Flatbush Ave, Brooklyn, NY 11225, USA Tel: +1 (718)-975-2586 E-Mail: [email protected] CFR 47 §2.911(d)(5)(i) Attestation Letter Attestation Letter Date: 2025-12-31 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i) Filing FCC ID: 2AJQ7CUBES1 QUEST USA CORP 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, Signature Printed Name: Ikey Srour Title: Manager

QUEST USA CORP Address: 495 Flatbush Ave, Brooklyn, NY 11225, USA Tel: +1 (718)-975-2586 E- Mail : [email protected] Product Similarity Declaration Date: 2025-12-31 To: FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir/Madam, We, QUEST USA COR P, hereby declare that we have a pr oduct name d as wireless speaker, model: DS20852-FB, FCC ID: 2AJQ7CUBES1 was tested by Shenzhen Accurate Technology Co., Ltd., meanwhile, for our marketing purpose, we would like to list a series model (DS20897-FB) on reports and certificate, all the models are identical in electrically. The difference please refer to the following table for details: Model No. Appearance DS20852-FB DS20897-FB We confirm that all information above is true, and we’ll be responsible for all the consequences. Please contact me if you have any question. Sincerely, Signature: Printed Name: Ikey Srour Title: Manager pink Transparent

Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT External Photos External Photos Page 1 / 4 External Photos Test mode: DS20852-FB(Left), Serial model: DS20897-FB(Right) Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT External Photos External Photos Page 2 / 4 Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT External Photos External Photos Page 3 / 4 Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT External Photos External Photos Page 4 / 4 ***** END *****

RED- DIECUT GREEN- BLEEDING FRONT BACK

Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT Internal Photos Internal Photos Page 1 / 5 Internal Photos Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT Internal Photos Internal Photos Page 2 / 5 Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT Internal Photos Internal Photos Page 3 / 5 Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT Internal Photos Internal Photos Page 4 / 5 Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF EUT Internal Photos Internal Photos Page 5 / 5 ANT ***** END *****

Note: This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA, or any agency of the Federal Government. The information marked “#” is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included but no need marked. 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. Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Tel: +86 755-26503290 Web: www.atc-lab.com Rev:A/4.0(2024/11/01) Page 1 of 6 TR-4-E-R063 TEST REPORT Applicant Name : Quest USA CORP Address : 495 Flatbush Ave, Brooklyn, NY 11225, USA Report Number : 2504Z32213E-RF FCC ID: 2AJQ7CUBES1 Test Standard (s) FCC PART 2.1093 Sample Description Product Type: wireless speaker Model No.: DS20852-FB, DS20897-FB Trade Mark: N/A Date Received: 2025-12-05 Report Date: 2025-12-31 Test Result: The EUT complied with the standards above. Prepared and Checked By: Approved By: Jason Fan Bob.Liao EMC Engineer EMC Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: 2504Z32213E-RF Rev:A/4.0(2024/11/01) Page 2 of 6 TR-4-E-R051 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ................................................................................................................ 3 GENERAL INFORMATION ............................................................................................................................ 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ........................................................................ 4 OBJECTIVE ................................................................................................................................................... 4 TEST FACILITY .............................................................................................................................................. 4 RF EXPOSURE .............................................................................................................................................. 5 APPLICABLE STANDARD ................................................................................................................................. 5 RESULT ........................................................................................................................................................ 5 EXHIBIT A-EUT PHOTOGRAPHS ................................................................................................................ 6 Shenzhen Accurate Technology Co., Ltd. Report No.: 2504Z32213E-RF Rev:A/4.0(2024/11/01) Page 3 of 6 TR-4-E-R051 DOCUMENT REVISION HISTORY Revision Number Report Number Description of Revision Date of Revision Rev.00 2504Z32213E-RF Original Report 2025-12-31 Shenzhen Accurate Technology Co., Ltd. Report No.: 2504Z32213E-RF Rev:A/4.0(2024/11/01) Page 4 of 6 TR-4-E-R051 GENERAL INFORMATION Product Description for Equipment under Test (EUT) Product Name wireless speaker Tested Model DS20852-FB Multiple Model DS20897-FB Model Difference # The difference among them is model name and appearance. Please refer to DOS letter for details. The applicant provided model “DS20852-FB” for testing. Voltage Range # DC 5V from USB Type-C port or DC 3.7V from battery Frequency Range Bluetooth: 2402-2480MHz Maximum Conducted Output Power 5.38 dBm Antenna Specification # Internal Antenna, Gain:1.3dBi (It is provided by the applicant.) Sample Serial Number 3CMQ-3(Assigned by ATC, Shenzhen) Sample/EUT Status Good condition Objective This test report is in accordance with Part 2-Subpart J, Part 15-Subparts C and Part 2-Subpart J, Radiofrequency Radiation Exposure of the Federal Communication Commission rules. The tests were performed in order to determine compliance with FCC §2.1093 rules. Test Facility The test site used by Shenzhen Accurate Technology Co., Ltd. to collect test data is located on the Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Accredited by American Association for Laboratory Accreditation (A2LA).The Certificate Number is 4297.01. Shenzhen Accurate Technology Co., Ltd. Report No.: 2504Z32213E-RF Rev:A/4.0(2024/11/01) Page 5 of 6 TR-4-E-R051 RF EXPOSURE Applicable Standard According to FCC §2.1093, systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. According to KDB 447498 D01 General RF Exposure Guidance v06. 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 1. f(GHz) is the RF channel transmit frequency in GHz. 2. Power and distance are rounded to the nearest mW and mm before calculation. 3. The result is rounded to one decimal place for comparison. 4. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test Exclusion. Result For worst case: Frequency (MHz) Tune-Up Conducted Output Power # (dBm) Tune-Up Conducted Output Power # (mW) Distance (mm) Calculated Value Threshold (1-g SAR) SAR Test Exclusion 2480 5.5 3.55 5 1.1 3 Yes Note: The tune-up conducted power is declared by the applicant. Result: No SAR test is required. Shenzhen Accurate Technology Co., Ltd. Report No.: 2504Z32213E-RF Rev:A/4.…

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Product specification Quick Reference Date All the technical data and information contained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna module on the system board Model DS208 Frequency 2.4-2.5GHz Ant. Port Input Pwr. (dBm) 0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm) -2.3 (Input pwr – loss pwr) Directivity (dBi) 1 (all direction antenna) Efficiency (dB) -2.3 (58.5%) Gain (dBi) 1.3 (Peak Gain XY-plane) Maximum Power (dBm) 1.3 (XY-plane) Minimum Power (dBm) -4(XY-plane) Avg. Power (dBm) -0.5(XY-plane) Max/Min Ratio (dB) 5.3(XY-plane) Max/Avg Ratio (dB) 1.8(XY-plane) Min/Avg Ratio (dB) -3.5(XY-plane) Average Gain (dB) -0.5 (Avg Gain XY-plane) Antenna Gain Return Loss Unit in dBi @2.44GHz XY-plane XZ-plane YZ-plane Efficiency Peak Avg. Peak Avg. Peak Avg. Module Board Gain (dBi) 1.3 -0.5 1.7 -3.8 1.1 -3.0 58.5% The Environment of Antenna Radiation Pattern 3D radiation pattern diagram QUEST USA CORP 495 Flatbush Ave, Brooklyn, NY 11225, USA

Note: This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA, or any agency of the Federal Government. The information marked ―#‖ is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included but no need marked. 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. Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Tel: +86 755-26503290 Web: www.atc-lab.com Rev:A/4.0(2024/11/01) Page 1 of 78 TR-4-E-R014 TEST REPORT Applicant Name: Quest USA CORP Address: 495 Flatbush Ave, Brooklyn, NY 11225, USA Report Number: 2504Z32213E-RF-00A FCC ID: 2AJQ7CUBES1 Test Standard (s) FCC PART 15.247 Sample Description Product Name: wireless speaker Model No.: DS20852-FB, DS20897-FB Trade Mark: N/A Date Received: 2025-12-05 Report Date: 2025-12-30 Test Result: The EUT complied with the standards above. Prepared and Checked By: Approved By: Jason Fan Bob.Liao EMC Engineer EMC Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: 2504Z32213E-RF-00A Rev:A/4.0(2024/11/01) Page 2 of 78 TR-4-E-R014 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ................................................................................................................ 4 GENERAL INFORMATION ............................................................................................................................ 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ........................................................................ 5 OBJECTIVE ................................................................................................................................................... 6 TEST METHODOLOGY .................................................................................................................................... 6 TEST FACILITY .............................................................................................................................................. 6 MEASUREMENT UNCERTAINTY ....................................................................................................................... 6 SYSTEM TEST CONFIGURATION ............................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION......................................................................................................... 7 EUT EXERCISE SOFTWARE AND POWER LEVEL # ............................................................................................ 7 SPECIAL ACCESSORIES ................................................................................................................................. 7 EQUIPMENT MODIFICATIONS .......................................................................................................................... 7 SUPPORT EQUIPMENT LIST AND DETAILS ....................................................................................................... 7 EXTERNAL I/O CABLE .................................................................................................................................... 7 BLOCK DIAGRAM OF TEST SETUP .................................................................................................................. 8 SUMMARY OF TEST RESULTS ................................................................................................................. 10 TEST EQUIPMENT LIST ............................................................................................................................. 11 ANTENNA REQUIREMENT......................................................................................................................... 12 APPLICABLE STANDARD ............................................................................................................................... 12 ANTENNA CONNECTOR CONSTRUCTION ....................................................................................................... 12 AC LINE CONDUCTED EMISSIONS .......................................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................... 13 EUT SETUP ................................................................................................................................................ 13 EMI TEST RECEIVER SETUP ........................................................................................................................ 13 TEST PROCEDURE ...................................................................................................................................... 13 CALCULATION ............................................................................................................................................. 14 TEST DATA ................................................................................................................................................. 14 RADIATED SPURIOUS EMISSIONS .......................................................................................................... 17 APPLICABLE STANDARD ............................................................................................................................... 17 EUT SETUP ......................................................................................................…

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Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF-00A Test Photos Test Photos Page 1 / 3 Photo of Power Line Conducted Emission Measurement Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF-00A Test Photos Test Photos Page 2 / 3 Radiated Spurious Emissions Test View (9kHz-30MHz) Radiated Spurious Emissions Test View (30MHz-1GHz) Shenzhen Accurate Technology Co., Ltd. No.: 2504Z32213E-RF-00A Test Photos Test Photos Page 3 / 3 Radiated Spurious Emissions Test View (1GHz-18GHz) Radiated Spurious Emissions Test View (Above 18GHz) ***** END *****