2BGW4-TDNN-BLKspeaker

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: Electronic Mac, Inc. FRN: 0033414541 Contact Name:Ray Sia Address: 6525 Crown Blvd, # 20805, San Jose, CA 95120 Telephone No: 408-332-2399 Email: [email protected] Applicant: Company name: BUENOS CHAOS LIMITED Product Description: speaker Grantee code: 2BGW4 F CC ID: 2BGW4-TDNN-BLK FRN：0035547652 Contact Name: CAROLINE WU Address：5FB03 NANFANG DASHA,DIXI 2ND ROAD,LIWAN,GUANGZHOU, CHINA Telephone No: 13825084899 Email: [email protected] [BUENOS CHAOS LIMITED] certifies that, as of the date of this filing of the application with the TCB, [Electronic Mac, Inc.] is our designated US agent for service of process for the above referenced FCC ID. [BUENOS CHAOS LIMITED] 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 equipment. [Electronic Mac, Inc.] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 2024/06/08 Applicant’s Name: BUENOS CHAOS LIMITED US Agent’s Name: Electronic Mac, Inc. Title: Manager Title: General Manager Signature Signature

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: BUENOS CHAOS LIMITED Grantee code: 2BGW4 FCC ID: 2BGW4-TDNN-BLK FRN: 0035547652 Contact Name: CAROLINE WU Address: 5FB03 NANFANG DASHA,DIXI 2ND ROAD,LIWAN,GUANGZHOU, CHINA Telephone No: 13825084899 Fax No: / Email: [email protected] i. [BUENOS CHAOS LIMITED] (“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. [BUENOS CHAOS LIMITED] (“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. [BUENOS CHAOS LIMITED] (“the applicant”) 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: 2024/06/08 Applicant’s Name: Title: 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 CAROLINE WU

C5266091_X8_Ed.1 1/1 Letter of Authorization BUENOS CHAOS LIMITED Company: BUENOS CHAOS LIMITED Address: 5FB03 NANFANG DASHA,DIXI 2ND ROAD,LIWAN,GUANGZHOU, CHINA Product Name: speaker Model Number: SPK-TDNN-BLK FCC Identifier: 2BGW4-TDNN-BLK 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: CAROLINE WU Date: 2024.6.08 Title: Manager Signature of applicant:

C5266091_X10_Ed.2 1/1 BUENOS CHAOS LIMITED Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2024.6.08 Subject: Request for Confidentiality FCC ID: 2BGW4-TDNN-BLK 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 NOTE 2 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 ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☒ No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. 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. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of _180_ days from the date of the Grant of Equipment Authorization and prior to marketing. 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, C5266091_X10_Ed.2 1/1 Signature: Name: CAROLINE WU Title: Manager

Label size: 20mm*15mm Name: speaker FCC ID: 2BGW4-TDNN-BLK Location

FCC ID: 2BGW4-TDNN-BLK RF Exposure Evaluation TEST STANDARDS Follow the maximum permissible exposure (MPE) limits specified in 447498 D04 Interim General Radio Frequency Exposure Guidelines v01. The gain of the antenna used in the product was extracted from the supplied antenna data sheet and the maximum total power input to the antenna was also measured. Calculate the distance from the product to the MPE limit by the formula. LIMIT For single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: (A) The available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A); (B) Or the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by: (C) Or using below table and the minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. For the exemption in Table 1 to apply, R must be at least λ/2π, where λ is the free-space operating wavelength in meters. If the ERP of a single RF source is not easily obtained, then the available maximum time-averaged power may be used in lieu of ERP if the physical dimensions of the radiating structure(s) do not exceed the electrical length of λ/4 or if the antenna gain is less than that of a half-wave dipole (1.64 linear value). FCC ID: 2BGW4-TDNN-BLK For multiple RF sources: Multiple RF sources are exempt if: (A) The available maximum time-averaged power of each source is no more than 1 mW and there is a separation distance of two centimeters between any portion of a radiating structure operating and the nearest portion of any other radiating structure in the same device, except if the sum of multiple sources is less than 1 mW during the time-averaging period, in which case they may be treated as a single source (separation is not required). This exemption may not be used in conjunction with other exemption criteria other than those is paragraph (b)(3)(i)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(i)(A). (B) in the case of fixed RF sources operating in the same time-averaging period, or of multiple mobile or portable RF sources within a device operating in the same time averaging period, if the sum of the fractional contributions to the applicable thresholds is less than or equal to 1 as indicated in the following equation. Where: a = number of fixed, mobile, or portable RF sources claiming exemption using paragraph (b)(3)(i)(B) of Part 1.1307 for Pth, including existing exempt transmitters and those being added. b = number of fixed, mobile, or portable RF sources claiming exemption using paragraph (b)(3)(i)(C) of Part 1.1307 for Threshold ERP, including existing exempt transmitters and those being added. c = number of existing fixed, mobile, or portable RF sources with known evaluation for the specified minimum distance including existing evaluated transmitters. Pi = the available maximum time-averaged power or the ERP, whichever is greater, for fixed, mobile, or portable RF source i at a distance between 0.5 cm and 40 cm (inclusive). Pth,i = the exemption threshold power (Pth) according to paragraph (b)(3)(i)(B) of this section for fixed, mobile, or portable RF source i. FCC ID: 2BGW4-TDNN-BLK ERPj = the ERP of fixed, mobile, or portable RF source j. ERPth,j = exemption threshold ERP for fixed, mobile, or portable RF source j, at a distance of at least λ/2π according to the applicable formula of paragraph (b)(3)(i)(C) of Part 1.1307. Evaluatedk = the maximum reported SAR or MPE of fixed, mobile, or portable RF source k either in the device or at the transmitter site from an existing evaluation at the location of exposure. Exposure Limitk = either the general population/uncontrolled maximum permissible exposure (MPE) or specific absorption rate (SAR) limit for each fixed, mobile, or portable RF source k, as applicable from § 1.1310. Test Result of RF Exposure Evaluation Protocol Fre. (GHz) Output power (dBm) Tune-up power (dBm) Max tune-up power (dBm) ANT Gain ( dBi) Max EIRP (dBm) Max EIRP (mW) Separation distance (cm) Limit (mW) Result BT 2441 1.91 2±1 3 -0.68 2.32 1.71 0.5 2.75 PASS Note: 1. This device is portable device. 2. The source of the evaluation data results is based on the test report ET-24060658E 3. The Maxinum power is less than the limit, complies with the exemption requirements.

Report No.: ET-24060658E This test report is valid for the tested samples only. It cannot be reproduced except in full without prior written consent of Shenzhen ETR Standard Technology Co., Ltd. TEST REPORT Applicant: BUENOS CHAOS LIMITED Address of Applicant: 5FB03 NANFANG DASHA,DIXI 2ND ROAD,LIWAN,GUANGZHOU, CHINA Manufacturer/Factory: BUENOS CHAOS LIMITED Address of Manufacturer/Factory: 5FB03 NANFANG DASHA,DIXI 2ND ROAD,LIWAN,GUANGZHOU, CHINA Product Name: Speaker Model No.: SPK-TDNN-BLK Trade Mark: N/A FCC ID: 2BGW4-TDNN-BLK Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of Test: Jun.04, 2024-Jun.12, 2024 Date of report issued: Jun.13, 2024 Remark: The results shown in this test report refer only to the sample(s) tested , this test report cannot be reproduced, except in full without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver Prepared By Shenzhen ETR Standard Technology Co., Ltd. Address: No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Compiled by: Reviewed by: Approved by: Project Engineer Project Manager Authorized Signature - Page 2 of 50 - Report No.: ET-24060658E Report Revision History Report No. Description Issue Date ET-24060658E Original Jun.13, 2024 - Page 3 of 50 - Report No.: ET-24060658E Tel:(86-755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Contents Page 1 TEST SUMMARY ......................................................................................................................................4 2 GENERAL INFORMATION .......................................................................................................................5 2.1 GENERAL DESCRIPTION OF EUT ..........................................................................................................5 2.2 TEST MODE .........................................................................................................................................7 2.3 DESCRIPTION OF SUPPORT UNITS ........................................................................................................7 2.4 DEVIATION FROM STANDARDS ..............................................................................................................7 2.5 ABNORMALITIES FROM STANDARD CONDITIONS ....................................................................................7 2.6 TEST FACILITY.....................................................................................................................................7 2.7 TEST LOCATION...................................................................................................................................7 2.8 ADDITIONAL INSTRUCTIONS ..................................................................................................................7 3 TEST INSTRUMENTS LIST ......................................................................................................................8 4 TEST RESULTS AND MEASUREMENT DATA .......................................................................................9 4.1 ANTENNA REQUIREMENT ......................................................................................................................9 4.2 CONDUCTED EMISSIONS ....................................................................................................................10 4.3 CONDUCTED PEAK OUTPUT POWER ...................................................................................................13 4.4 20DB EMISSION BANDWIDTH ..............................................................................................................14 4.5 CARRIER FREQUENCIES SEPARATION .................................................................................................18 4.6 HOPPING CHANNEL NUMBER .............................................................................................................22 4.7 DWELL TIME ......................................................................................................................................24 4.8 BAND EDGE.......................................................................................................................................29 4.8.1 Conducted Emission Method ......................................................................................................29 4.8.2 Radiated Emission Method .........................................................................................................36 4.9 SPURIOUS EMISSION .........................................................................................................................38 4.9.1 Conducted Emission Method ......................................................................................................38 4.9.2 Radiated Emission Method .........................................................................................................42 5 TEST SETUP PHOTO .............................................................................................................................50 6 EUT CONSTRUCTIONAL DETAILS .......................................................................................................50 - Page 4 of 50 - Report No.: ET-24060658E Tel:(86-755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China 1 Test Summary Test Item Section in CFR 47 Result Test by Antenna Requirement 15.203/15.247 (c) Pass / AC Power Line Conducted Emission 15.207 Pass Carr Kang Conducted Peak Output Power 15.247 (b)(1) Pass Yvan Fan 20dB Occupied Bandwidth 15.247 (a)(1) Pass Yvan Fan Carrier Frequencies Separation 15.…

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ANTENNA SPECIFICATION Summary ITEM ANT SPEC Model Name 2.4GANT Horizontal Vertic-01 Center Frequency dBi 2400MRz 2450MHz 2500MHz 2400MHz 2450MHz 2500MHz -1.73 -0.84 - 0.68 -6.15 -3.70 -2.32 MAX.Gain -0.68dBi Polanzation Honzontal and Vertical Azimuth Beam Pattem Onmi-directional lmpcdancc 50 Ohm Antenna Length 38.88mm Manufacture BU ENOS C曰AOS LIMITED Antenna Photo & Length (mm) 14.5 mm 23 mm 5.7mm Horizontal: 2400 MHz 2450 MHz 2500 MHz dBi Max: 0 Min: -40 Scale: 5/div Gain(dBi) Frequency (MHz) Max Min Avg 2400 -1.726174 -30.0801 -7.18716 2450 -0.835802 -36.5604 -7.48023 2500 -0.675582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz dBi Max: 0 Min: -30 Scale: 5/div Gain(dBi) Frequency (MHz) Max Min Avg 2400 -6.1537 -22.1424 -12.4294 2450 -3.7045 -24.5837 -10.4702 2500 -2.3212 -29.5214 -9.20432