2A6EBQS002AUXKEESON-SPEAKER

Bluetooth speaker 一、interface specification A interface: Audio output B interface: Power supply and Serial port B-1 : Power supply 29V input B-2 : GND B-3 :NC B-4 : A serial port input C interface: Audio input 二、steps 1、Interface A and interface B are inserted ， Do not remove the fork with the power on . 2 、Power on the power supply . 3、You can hear the machine working tone，At this point, you can connect bluetooth to play music . 4 、At the same time, the serial port data can be sent externally, and the corresponding waveform can be output from the audio output port. 5、The baud rate of the serial port is 48400 . 6. If the Bluetooth is not connected or the Bluetooth is connected but not played, then the external audio source C-AUX interface has access. The stereo will play sounds from external sources. 三、Product diagram Version V1.01 Date 2023.05.05 FCC WARNING 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. To maintain compliance with FCC’s RF Exposure guidelines, This equipment should be installed and operated with minimum distance between 20cm the radiator your body: Use only the supplied antenna. IC Caution: This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the following two conditions: (1) This device may not cause interference; and (2) This device must accept any interference, including interference that may cause undesired operation of the device. To maintain compliance with RF exposure guidelines, this equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body. Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux apparei ls radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Pour maintenir la conformité aux directives d'exposition aux radiofréquences, cet équipement doit être installé et utilisé avec une distance minimale de 20 cm entre le radiateur et votre corps.

(RongYuan(ZhuHai) Electronic Technology 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: 2A6EBQS002AUX) [RongYuan(ZhuHai) Electronic 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. Sincerely, (Applicant signature) (Applicant printed name) Huangbo Lan (RongYuan(ZhuHai) Electronic Technology 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: 2A6EBQS002AUX) [RongYuan(ZhuHai) Electronic Technology 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) Huangbo Lan

RongYuan(ZhuHai) Electronic Technology 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: KEESON-SPEAKER Trademark: N/A MODEL : QS002AUX FCC ID: 2A6EBQS002AUX 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 : Huangbo Lan/Manager Contact information / address: 3rd Floor, 1st Workshop, No. 2, Pingbei 2nd Road, Nanping Industrial Park, Zhuhai, Guangdong, China

RongYuan(ZhuHai) Electronic Technology 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 : Huangbo Lan/Manager Contact information / address: 3rd Floor, 1st Workshop, No. 2, Pingbei 2nd Road, Nanping Industrial Park, Zhuhai, Guangdong, China

External Photos

Label & label location

Internal Photos Antenna

RF EXPOSURE EVALUATION METHOD FCC ID: 2A6EBQS002AUX 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 -2.736 21 GFSK Middle -2.928 21 GFSK High -2.970 21 π/ 4 DQPSK Low -0.210 21 π/ 4 DQPSK Middle -0.440 21 π/ 4 DQPSK High -0.563 21 8DPSK Low 0.441 21 8DPSK Middle 0.155 21 8DPSK High 0.021 21 max possible output power (PK,conducted)：1±1dBm 1.7dBi logarithmic terms convert to numeric result is nearly 1.479 2dBm=1.58mW 2402MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 1.58/5*√2.402=0.49≤3.0 2441MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 1.58/5*√2.440=0.50≤3.0 2480MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 1.58/5*√2.48=0.50≤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.

RongYuan(ZhuHai) Electronic Technology Co., Ltd. 3rd Floor, 1st Workshop, No.2, Pingbei 2nd Road, Nanping Industrial Park, Zhuhai, Guangdong, China

No.：BCTC/RF-EMC-007 Page: 1 of 65 Edition：A.5 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2304706550E Applicant: RongYuan(ZhuHai) Electronic Technology Co., Ltd. Product Name: KEESON-SPEAKER Model/Type reference: QS002AUX Tested Date: 2023-04-27 to 2023-05-05 Issued Date: 2023-05-05 Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 2 of 65 Edition：A.5 FCC ID:2A6EBQS002AUX 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: KEESON-SPEAKER Trademark: N/A Model/Type reference: QS002AUX Prepared For: RongYuan(ZhuHai) Electronic Technology Co., Ltd. Address: 3rd Floor, 1st Workshop, No. 2, Pingbei 2nd Road, Nanping Industrial Park, Zhuhai, Guangdong, China Manufacturer: RongYuan(ZhuHai) Electronic Technology Co., Ltd. Address: 3rd Floor, 1st Workshop, No. 2, Pingbei 2nd Road, Nanping Industrial Park, Zhuhai, Guangdong, 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: 2023-04-27 Sample tested Date: 2023-04-27 to 2023-05-05 Issue Date: 2023-05-05 Report No.: BCTC2304706550E 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.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 3 of 65 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 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List .......................................................................................................... 9 4.5 Test Mode ........................................................................................................... 10 4.6 Table Of Parameters Of Text Software Setting ................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test procedure .................................................................................................... 13 6.4 EUT operating Conditions ................................................................................... 13 6.5 Test Result .......................................................................................................... 13 7. Radiated Emissions ............................................................................................. 14 7.1 Block Diagram Of Test Setup .............................................................................. 14 7.2 Limit .................................................................................................................... 15 7.3 Test procedure .................................................................................................... 16 7.4 EUT operating Conditions ................................................................................... 17 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. Spurious RF Conducted Emissions ..................................................................... 25 9.1 Block Diagram Of Test Setup .............................................................................. 25 9.2 Limit .................................................................................................................... 25 9.3 Test procedure .................................................................................................... 25 9.4 Test Result ....................................…

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Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 48 of 65 Edition：A.5 12.4 Test Result Modulation Test Channel Separation (MHz) Limit(MHz) Result GFSK Low 1.002 0.870 PASS GFSK Middle 1.002 0.871 PASS GFSK High 1.000 0.874 PASS π/ 4 DQPSK Low 1.000 0.844 PASS π/ 4 DQPSK Middle 0.998 0.845 PASS π/ 4 DQPSK High 1.002 0.845 PASS 8DPSK Low 1.000 0.809 PASS 8DPSK Middle 1.002 0.809 PASS 8DPSK High 1.000 0.810 PASS Test plots GFSK Low Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 49 of 65 Edition：A.5 GFSK Middle Channel GFSK High Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 50 of 65 Edition：A.5 π/ 4 DQPSK Low Channel π/ 4 DQPSK Middle Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 51 of 65 Edition：A.5 π/ 4 DQPSK High Channel 8DPSK Low Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 52 of 65 Edition：A.5 8DPSK Middle Channel 8DPSK High Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 53 of 65 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; 13.4 Test Result Condition Mode Hopping Number Limit Verdict NVNT 1-DH1 79 15 Pass NVNT 2-DH1 79 15 Pass NVNT 3-DH1 79 15 Pass Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 54 of 65 Edition：A.5 Test Plots: 79 Channels in total GFSK π/ 4 DQPSK Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 55 of 65 Edition：A.5 8DPSK Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 56 of 65 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). 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: Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 57 of 65 Edition：A.5 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 0.382 0.122 0.4 1DH3 1.630 0.261 0.4 1DH5 2.888 0.308 0.4 π/ 4 DQPSK Middle 2DH1 0.389 0.124 0.4 2DH3 1.645 0.263 0.4 2DH5 2.864 0.305 0.4 8DPSK Middle 3DH1 0.392 0.125 0.4 3DH3 1.645 0.263 0.4 3DH5 2.872 0.306 0.4 Test Plots GFSK DH1 Middle Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 58 of 65 Edition：A.5 GFSK DH3 Middle Channel GFSK DH5 High Middle Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 59 of 65 Edition：A.5 π/ 4 DQPSK DH1 Middle Channel π/ 4 DQPSK DH3 Middle Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 60 of 65 Edition：A.5 π/ 4 DQPSK DH5 Middle Channel 8DPSK DH1 Middle Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 61 of 65 Edition：A.5 8DPSK DH3 Middle Channel 8DPSK DH5 Middle Channel Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 62 of 65 Edition：A.5 15. Antenna Requirement 15.1 Limit 15.203 requirement: For intentional device, according to 15.203: an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. 15.2 Test Result The EUT antenna is PCB antenna, fulfill the requirement of this section. Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 63 of 65 Edition：A.5 16. EUT Photographs EUT Photo NOTE: Appendix-Photographs Of EUT Constructional Details Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 64 of 65 Edition：A.5 17. EUT Test Setup Photographs Radiated Measurement Photos Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 65 of 65 Edition：A.5 STATEMENT 1. The equipment lists are traceable to the national reference standards. 2. The test report can not be partially copied unless prior written approval is issued from our lab. 3. The test report is invalid without the "special seal for inspection and testing". 4. The test report is invalid without the signature of the approver. 5. The test process and test result is only related to the Unit Under Test. 6. Sample information is provided by the client and the laboratory is not responsible for its authenticity. 7. The test repo…

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Report No.: BCTC2304706550E No.：BCTC/RF-EMC-007 Page: 64 of 65 Edition：A.5 17. EUT Test Setup Photographs Radiated Measurement Photos