2A7J4-QAM50Instrument Speaker

OasisCompliance,Inc.FCCID: 2A7J4-QAM50 CFR47§2.911(d)(7)FCCUSAgentLetterofAttestation Date:07-31-2023 FCCID:2A7J4-QAM50 To:FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 ToWhomItMayConcern, ThisletteristoconfirmthatwehaveacceptedtheresponsibilitytoactasUSAgentonbehalf ofChangshaSonicakeTechnologyCo.,Ltd.(“theapplicant”)fortheabovereferencedFCC ID. Weareawareoftherequirementsandresponsibilitiesoftheapplicant’sagentforserviceof processasoutlinedintheFCCsection2.911(d)(7)andReportandOrderFCC22-84paragraph 63. U.S.AgentInformation: OasisCompliance,Inc. FRN:0033464157 JamesHe 3313VerdiDr,SanJose,CA95111 Cell:2026028330 Sincerelyyours, JamesHe GlobalMarketAccessManager OasisCompliance,Inc. Email:[email protected]

C5266091_X24_Ed.2 1/1 “Attestation Statements” TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Changsha Sonicake Technology Co., LTD. Grantee code: 2A7J4 FCC ID: 2A7J4-QAM50 Contact Name: Feng Qian Address: Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone, Changsha City, Hunan Province, P.R. China Telephone No: 0731-88710800 Fax No: Email: [email protected] i. [Changsha Sonicake Technology Co., LTD.] (“the applicant”) 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. The applicant must sign this certification. ii. [ Changsha Sonicake Technology Co., LTD.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. Changsha Sonicake 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. Date: 8.1 8.2023 Applicant’s Name: Feng Qian Title: general manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

CFR47§2.911(d)(7)AgentDesignationAttestation Date:07-31-2023 FCCID:2A7J4-QAM50 To:FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 ChangshaSonicakeTechnologyCo.,Ltd.(“theapplicant”)asrequiredbysection2.911(d)(7), designatesthefollowingagent,locatedintheUnitedStates,forpurposesofactingasthe applicant’sagentforserviceofprocess. Theapplicantacknowledgesthattheywillmaintainanagentfornolessthanoneyearafterthe granteehasterminatedallmarketingandimportationortheconclusionofanyCommission- relatedproceedinginvolvingtheequipment.Theapplicantfurtheracknowledgestheir responsibilitytoinformtheFCCwhenevertheagentinformationchanges. U.S.AgentInformation: JamesHe OasisCompliance,Inc. FRN:0033464157 3313VerdiDr,SanJose,CA95111 [email protected] cell:2026028330 Sincerelyyours, PatrickQian Manager ChangshaSonicakeTechnologyCo.,Ltd. Address:Room601A16,EnterpriseBuilding,HunanUniversitySciencePark,No.186,Guyuan Road,High-techZone,ChangshaCity,HunanProvince,P.RChina. Email:[email protected] Phone:+860731-88710800

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Changsha Sonicake Technology Co., LTD. Address: Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone, Changsha City, Hunan Province, P.R. China Product Name: Instrument Speaker Model Number: QAM-50 FCC Identifier: 2A7J4-QAM50 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Feng Qian Date: 8/18/2023 Title: general manager Signature of applicant:

C5266091_X10_Ed.1 1/1 Changsha Sonicake Technology Co., LTD. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 8/18/2023 Subject: Request for Confidentiality FCC ID: 2A7J4-QAM50 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality ID Label/Location No No Attestation Statement No No External Photos No Block Diagram Schematics Test Report No No Test Setup Photos No User’s Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Feng Qian Date: 8/18/2023 Title: general manager

Page 1 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Appendix - EUT Photos Model: QAM-50 Page 2 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Page 3 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Page 4 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Page 5 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] ----End of Report----

219.38 mm 1 2 1 . 4 0 m m

Page 1 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Appendix - EUT Photos Model: QAM-50 Page 2 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Page 3 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] ANT Page 4 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Page 5 of 5 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] ----End of Report----

Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] RF EXPOSURE Test Report Report No.: MTi221229004-10E2 Date of issue: 2023-05-29 Applicant: Changsha Sonicake Technology Co., LTD Product: Instrument Speaker Model(s): QAM-50 FCC ID: 2A7J4-QAM50 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 6- Report No.: MTi221229004-10E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Instructions 1. The report shall not be partially reproduced without the written consent of the laboratory; 2. The test results of this report are only responsible for the samples submitted; 3. This report is invalid without the seal and signature of the laboratory; 4. This report is invalid if transferred, altered or tampered with in any form without authorization; 5. Any objection to this report shall be submitted to the laboratory within 15 days from the date of receipt of the report. - Page 3 of 6- Report No.: MTi221229004-10E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Applicant: Changsha Sonicake Technology Co., LTD Address: Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone, Changsha City, Hunan Province, P.R. China Manufacturer: Changsha Hotone Audio Co., LTD Address: Room 207, East Block, Hunan University National Science Park, No.186, Guyuan Road, High-tech Zone, Changsha City, Hunan Province, P.R China Product description Product name: Instrument Speaker Trademark: Sonicake Model name: QAM-50 Serial Model: N/A Standards: N/A Test method: KDB 447498 D01 v06 Date of Test Date of test: 2023-02-17 ~ 2023-05-29 Test result: Pass Test Engineer : (Yanice Xie) Reviewed By: : (Leon Chen) Approved By: : (Tom Xue) - Page 4 of 6- Report No.: MTi221229004-10E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Table of Contents 1. STANDALONE SAR TEST EXCLUSION CONSIDERATIONS ............................................................................................ 5 2. SAR TEST EXCLUCSION THRESHOLDS ........................................................................................................................ 6 - Page 5 of 6- Report No.: MTi221229004-10E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] 1. Standalone SAR test exclusion considerations Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions. The minimum test separation distance defined in 4.1 f) is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander. To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified, typically in the SAR measurement or SAR analysis report, by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting are required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions. a) For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(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 values 3.0 and 7.5 are referred to as numeric thresholds in step b) below 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 according to 4.1 f) is applied to determine SAR test exclusion. b) For 100 MHz to 6 GHz and test separation distances > 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following (also illustrated in Appendix B): 1) {[Power allowed at numeric threshold for 50 mm in step a)] + [(test separation distance – 50 mm)·(f(MHz)/150)]} mW, for 100 MHz to 1500 MHz 2) {[Power allowed at…

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Inverted F Antenna Specification Summary ITEM ANT SPEC Model Name 2.4G ANT Horizontal Vertical 2400MHz 2450MHz2500MHz2400MHz2450MHz 2500MHz Center Frequency -1.73 -0.84 -0.68 -6.15 -3.70 -2.32 MAX. Gain -0.68dBi Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance 50 Ohm Antenna Length 38.20mm Manufacture ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -1.73178 -30.0815 -8.48713 2450 -0.845801 -38.5605 -7.88012 2500 -0.685586 -24.0318 -6.79139 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -6.1530 -24.1420 -13.0295 2450 -3.7054 -26.5836 -10.6700 2500 -2.32122 -30.4301 -9.70536 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Test Report Report No.: MTi221229004-10E1 Date of issue: 2023-05-29 Applicant: Changsha Sonicake Technology Co., LTD Product: Instrument Speaker Model(s): QAM-50 FCC ID: 2A7J4-QAM50 Shenzhen Microtest Co., Ltd. http://www.mtitest.com Page 2 of 59 Report No.: MTi221229004-10E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Instructions 1. This test report shall not be partially reproduced without the written consent of the laboratory. 2. The test results in this test report are only responsible for the samples submitted 3. This test report is invalid without the seal and signature of the laboratory. 4. This test report is invalid if transferred, altered, or tampered with in any form without authorization. 5. Any objection to this test report shall be submitted to the laboratory within 15 days from the date of receipt of the report. Page 3 of 59 Report No.: MTi221229004-10E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Table of contents 1 General Description ........................................................................................................................ 5 1.1 Description of the EUT ....................................................................................................................................... 5 1.2 Description of test modes ................................................................................................................................... 5 1.3 Test conditions .................................................................................................................................................... 7 1.4 Description of support units ................................................................................................................................ 7 2 Measurement uncertainty ............................................................................................................... 8 3 Summary of Test Result .................................................................................................................. 9 4 Test Laboratory ............................................................................................................................. 10 5 Equipment List .............................................................................................................................. 11 6 Test Result ..................................................................................................................................... 13 6.1 Antenna requirement ........................................................................................................................................ 13 6.2 AC power line conducted emissions................................................................................................................. 14 6.3 Radiated spurious emission ............................................................................................................................. 17 6.4 20dB emission bandwidth ................................................................................................................................ 26 6.5 Maximum conducted output power .................................................................................................................. 27 6.6 Carrier frequency separation ............................................................................................................................ 28 6.7 Time of occupancy............................................................................................................................................ 29 6.8 Number of hopping channels ........................................................................................................................... 30 6.9 Band edge (Conducted) ................................................................................................................................... 31 6.10 Conducted spurious emissions ...................................................................................................................... 32 Appendix A: 20dB Emission Bandwidth ............................................................................................. 33 Appendix B: Maximum conducted output power ............................................................................... 36 Appendix C: Carrier frequency separation ......................................................................................... 39 Appendix D: Time of occupancy ......................................................................................................... 41 Appendix E: Number of hopping channels......................................................................................... 46 Appendix F: Band edge measurements .............................................................................................. 48 Appendix G: Conducted Spurious Emission ...................................................................................... 51 Photographs of the Test Setup ............................................................................................................ 58 Photographs of the EUT....................................................................................................................... 59 Page 4 of 59 Report No.: MTi221229004-10E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xi…

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Page 1 of 2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Appendix - Test Setup Photos Model: QAM-50 Radiated emissions –Below 1 GHz Radiated emissions –Above 1 GHz Page 2 of 2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Conducted emissions ----End of Report----