2BA4R-BR28wireless speaker

Shenzhen Xinou Electronic Commerce Co.,Ltd U.S. Agent Designation for Service of Process (Applicant and U.S. Agent are Separate Parties) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA ATTENTION: FCC Certification – Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Baihetian Innovative Solutions FRN: 0033401605 Contact Name: Kenneth Young Street Address: 6837 Chase Rd City/Province/Zip: Dearborn, MI 48126 Telephone No: 313-395-3113 Email: [email protected] This letter is to confirm that we (“the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: April 8, 2023 Signed by (Printed Name/Title): Kenneth Young/Manager The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shenzhen Xinou Electronic Commerce Co.,Ltd Grantee Code: 2BA4R FCC ID: 2BA4R -BR28 Contact Name: ZHU WENFU Address: Rm 406, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, P. R. China Telephone No: 0755-82904792 Email: [email protected] Applicant Signature: Date: 2023-05-08 Signed by (Printed Name/Title): ZHU WENFU / Manager

(Shenzhen Xinou Electronic Commerce Co.,Ltd) (2023.05.8 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: 2BA4R-BR28) [Shenzhen Xinou Electronic Commerce 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. Sincerely, (Applicant signature) (Applicant printed name) ZHU WENFU (Shenzhen Xinou Electronic Commerce Co.,Ltd) (2023.05.8) 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: 2BA4R-BR28) [Shenzhen Xinou Electronic Commerce Co.,Ltd] (“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. Sincerely, (Applicant signature) (Applicant printed name) ZHU WENFU

Shenzhen Xinou Electronic Commerce Co.,Ltd 2023.5.8 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: wireless speaker Trademark: MODEL : BR28 BR6, BR12, BP12, BR16, BR18, BR19, BR20, BR23, BR25, BR27, BR29, BR30, BR31, BR32, BR33, BR34, BR35, BR36, BP8 FCC ID:2BA4R-BR28 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 : ZHU WENFU/Manager Contact information / address: Rm 406, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, P. R. China

Shenzhen Xinou Electronic Commerce Co.,Ltd 2023.5.8 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing 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 : ZHU WENFU/Manager Contact information / address: Rm 406, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, P. R. China

Shenzhen Xinou Electronic Commerce Co.,Ltd Model Difference Product description: wireless speaker Model name: BR28 BR6, BR12, BP12, BR16, BR18, BR19, BR20, BR23, BR25, BR27, BR29, BR30, BR31, BR32, BR33, BR34, BR35, BR36, BP8 Trade Name: FCC ID: 2BA4R-BR28 All the model are the same circuit and RF module, except model names and appearance of the color. Regards Sincerely Client’s signature: Client’s name / title : ZHU WENFU/Manager Contact information / address: Rm 406, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, P. R. China

External Photos

Label & label location 10mm*5mm FCC ID:2BA4R-BR28

Internal Photos Antenna

RF EXPOSURE EVALUATION METHOD FCC ID: 2BA4R-BR28 Applicable standard： In accordance with FCC 47 CFR part 2 (2.1093) this device has been defined as a portable device which is defined as a transmitting device designed to be used so that the radiating structure(s) of the device is/are within 20 centimeters of the body of the user. Portable devices must be evaluated using the specified in FCC 47 CFR part 2 (2.1093) and ANSI/IEEEC95.1-1992. and had been tested in accordance with the measurement methods and procedures specified in IEEE 1528-2003. Per FCC KDB 447498 D01 v06, the 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances s 50 mm are determined by: 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. BT GFSK Low -1.86 21 GFSK Middle -2.09 21 GFSK High -2.77 21 π/4DQPSK Low -1.06 21 π/4DQPSK Middle -1.35 21 π/4DQPSK High -2.01 21 8DPSK Low -0.49 21 8DPSK Middle -0.83 21 8DPSK High -1.46 21 max possible output power (PK,conducted)：0±1dBm 1.9dBi logarithmic terms convert to numeric result is nearly 1.549 0dBm=1.26mW 2402MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 1.26/5*√2.402=0.39≤3.0 2441MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 1.26/5*√2.440=0.39≤3.0 2480MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 1.26/5*√2.48=0.40≤3.0 Conclusion: 1. [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] * [√f(GHz)] < 3.0. 2. SAR Test Exclusion Thresholds is 3.0 for separation distance 5mm. Therefore, SAR test is not 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) 1.2 Directivity (dBi) 1 (all direction antenna) Efficiency (dB) 6 0.2 % Gain (dBi) 1.9 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 V ertical & Horizontal V . S .W . R < 1.4 All the technical data and information contained herein are subject to ch ange 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 -0.51.9 -3.61.1 -3.06 0.2 % 6mm 14mm Prepared For:Shenzhen Xinou Electronic Commerce Co.,Ltd Address:Rm 406, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, P. R. China Retum Loss The Environment of Antenna Radiation Pattem 3D radiation pattern diagram XY-plane XZ-plane YZ-plane

No.：BCTC/RF-EMC-005 Page 1 of 79 Edition：A.5 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2304199405E Applicant: Shenzhen Xinou Electronic Commerce Co.,Ltd Product Name: wireless speaker Model/Type Ref.: BR28 Tested Date: 2023-04-18 to 2023-04-21 Issued Date: 2023-04-21 Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 2 of 79 Edition：A.5 FCC ID:2BA4R-BR28 The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. Product Name: wireless speaker Trademark: Model/Type Ref.: BR28 BR6, BR12, BP12, BR16, BR18, BR19, BR20, BR23, BR25, BR27, BR29, BR30, BR31, BR32, BR33, BR34, BR35, BR36, BP8 Prepared For: Shenzhen Xinou Electronic Commerce Co.,Ltd Address: Rm 406, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, P. R. China Manufacturer: Shenzhen Xinou Electronic Commerce Co.,Ltd Address: Rm 406, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, P. R. China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2023-04-18 Sample tested Date: 2023-04-18 to 2023-04-21 Issue Date: 2023-04-21 Report No.: BCTC2304199405E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is Bluetooth Classic radio test report. Tested by: Approved by: Kelsey Tan/ Project Handler Zero Zhou/Reviewer Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 3 of 79 Edition：A.5 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 8 4.4 Channel List .......................................................................................................... 9 4.5 Test Mode ............................................................................................................. 9 4.6 Table Of Parameters Of Text Software Setting ..................................................... 9 5. Test Facility And Test Instrument Used ............................................................... 10 5.1 Test Facility ......................................................................................................... 10 5.2 Test Instrument Used .......................................................................................... 10 6. Conducted Emissions .......................................................................................... 12 6.1 Block Diagram Of Test Setup .............................................................................. 12 6.2 Limit .................................................................................................................... 12 6.3 Test Procedure ................................................................................................... 12 6.4 EUT Operating Conditions .................................................................................. 12 6.5 Test Result .......................................................................................................... 13 7. Radiated Emissions ............................................................................................. 15 7.1 Block Diagram Of Test Setup .............................................................................. 15 7.2 Limit .................................................................................................................... 16 7.3 Test Procedure ................................................................................................... 17 7.4 EUT Operating Conditions .................................................................................. 18 7.5 Test Result .......................................................................................................... 18 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 22 8.1 Block Diagram Of Test Setup .............................................................................. 22 8.2 Limit .................................................................................................................... 22 8.3 Test Procedure ................................................................................................... 23 8.4 EUT Operating Conditions .................................................................................. 23 8.5 Test Result .......................................................................................................... 24 9. Conducted Emission ........................................................................................... 25 9.1 Block Diagram Of Test Setup .............................................................................. 25 9.2 Limit .................................................................................................................... 25 9.3 Test Procedure ................................................................................................... 25 9.4 Test Re…

Text truncated - open the document above for the full version.

Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 54 of 79 Edition：A.5 Test Graphs Power NVNT 1-DH1 2402MHz Power NVNT 1-DH1 2441MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 55 of 79 Edition：A.5 Power NVNT 1-DH1 2480MHz Power NVNT 2-DH1 2402MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 56 of 79 Edition：A.5 Power NVNT 2-DH1 2441MHz Power NVNT 2-DH1 2480MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 57 of 79 Edition：A.5 Power NVNT 3-DH1 2402MHz Power NVNT 3-DH1 2441MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 58 of 79 Edition：A.5 Power NVNT 3-DH1 2480MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 59 of 79 Edition：A.5 12. Hopping Channel Separation 12.1 Block Diagram Of Test Setup 12.2 Limit Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400-2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 0.125W. 12.3 Test Procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set the spectrum analyzer: RBW = 30kHz. VBW = 100kHz , Span = 2.0MHz. Sweep = auto; Detector Function = Peak. Trace = Max hold. 3. Allow the trace to stabilize. Use the marker-delta function to determine the separation between the peaks of the adjacent channels. The limit is specified in one of the subparagraphs of this Section Submit this plot. 12.4 Test Result Modulation Test Channel Separation (MHz) Limit(MHz) Result GFSK Low 0.998 0.877 PASS GFSK Middle 1 0.865 PASS GFSK High 1.002 0.879 PASS π/4DQPSK Low 1 0.839 PASS π/4DQPSK Middle 1.002 0.821 PASS π/4DQPSK High 0.998 0.821 PASS 8DPSK Low 1 0.801 PASS 8DPSK Middle 0.998 0.803 PASS 8DPSK High 1.006 0.839 PASS Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 60 of 79 Edition：A.5 Test Graphs CFS NVNT 1-DH1 2402MHz CFS NVNT 1-DH1 2441MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 61 of 79 Edition：A.5 CFS NVNT 1-DH1 2480MHz CFS NVNT 2-DH1 2402MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 62 of 79 Edition：A.5 CFS NVNT 2-DH1 2441MHz CFS NVNT 2-DH1 2480MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 63 of 79 Edition：A.5 CFS NVNT 3-DH1 2402MHz CFS NVNT 3-DH1 2441MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 64 of 79 Edition：A.5 CFS NVNT 3-DH1 2480MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 65 of 79 Edition：A.5 13. Number Of Hopping Frequency 13.1 Block Diagram Of Test Setup 13.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. 13.3 Test Procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set the spectrum analyzer: RBW = 100kHz. VBW = 300kHz. Sweep = auto; Detector Function = Peak. Trace = Max hold. 3. Allow the trace to stabilize. It may prove necessary to break the span up to sections. in order to clearly show all of the hopping frequencies. The limit is specified in one of the subparagraphs of this Section. 4. Set the spectrum analyzer: Start Frequency = 2.4GHz, Stop Frequency = 2.4835GHz. Sweep=auto; Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 66 of 79 Edition：A.5 13.4 Test Result Test Graphs Hopping No. NVNT 1-DH1 2441MHz Hopping No. NVNT 2-DH1 2441MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 67 of 79 Edition：A.5 Hopping No. NVNT 3-DH1 2441MHz Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 68 of 79 Edition：A.5 14. Dwell Time 14.1 Block Diagram Of Test Setup 14.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of 0.4 seconds multiplied by the number of hopping channels employed. Frequency hopping systems may avoid or suppress transmissions on a particular hopping frequency provided that a minimum of 15 channels are used. 14.3 Test Procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set spectrum analyzer span = 0. Centred on a hopping channel; 3. Set RBW = 1MHz and VBW = 3MHz.Sweep = as necessary to capture the entire dwell time per hopping channel. Set the EUT for DH5, DH3 and DH1 packet transmitting. 4. Use the marker-delta function to determine the dwell time. If this value varies with different modes of operation (e.g.. data rate. modulation format. etc.). repeat this test for each variation. The limit is specified in one of the subparagraphs of this Section. Submit this plot(s). Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 69 of 79 Edition：A.5 14.4 Test Result DH5 Packet permit maximum 1600 / 79 / 6 hops per second in each channel (5 time slots RX, 1 time slot TX). DH3 Packet permit maximum 1600 / 79 / 4 hops per second in each channel (3 time slots RX, 1 time slot TX). DH1 Packet permit maximum 1600 / 79 /2 hops per second in each channel (1 time slot RX, 1 time slot TX). So, the Dwell Time can be calculated as follows: DH5:1600/79/6*0.4*79*(MkrDelta)/1000 DH3:1600/79/4*0.4*79*(MkrDelta)/1000 DH1:1600/79/2*0.4*79*(MkrDelta)/1000 Remark: Mkr Delta is once pulse time. Modulation Channel Data Packet pulse time(ms) Dwell Time(s) Limits(s) GFSK Middle 1DH1 0.376 0.120 0.4 1DH3 1.632 0.261 0.4 1DH5 2.88 0.307 0.4 π/4DQPSK Middle 2DH1 0.378 0.121 0.4 2DH3 1.637 0.262 0.4 2DH5 2.884 0.308 0.4 8DPSK Middle 3DH1 0.387 0.124 0.4 3DH3 1.636 0.262 0.4 3DH5 2.887 0.308 0.4 Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 70 of 79 Edition：A.5 Test Graphs Dwell NVNT 1-DH1 2441MHz One Burst Dwell NVNT 1-DH3 2441MHz One Burst Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 71 of 79 Edition：A.5…

Text truncated - open the document above for the full version.

Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 77 of 79 Edition：A.5 17. EUT Test Setup Photographs Conducted Measurement Photo Radiated Measurement Photos Report No.: BCTC2304199405E No.：BCTC/RF-EMC-005 Page 78 of 79 Edition：A.5