2AZ43-ET23APortable Speaker

技术要求： 1.成品尺寸90*90mm 展开尺寸：720*90mm 2.128g铜版纸 3.风琴折，红色虚线为压线无需印刷出来。 4.单黑色双面印刷 D Ω Bobtot Sound Air1 BT device

(MOSWS INTERNATIONAL LIMITED) (2023.10.07 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: 2AZ43-ET23A) [MOSWS INTERNATIONAL 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. Sincerely, (Applicant signature) (Applicant printed name) Guogui Huang (MOSWS INTERNATIONAL LIMITED) (2023.10.07) 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: 2AZ43-ET23A) [MOSWS INTERNATIONAL 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. Sincerely, (Applicant signature) (Applicant printed name) Guogui Huang

MOSWS INTERNATIONAL LIMITED 2023.10.7 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Portable Speaker Trademark: Bobtot MODEL : ET23A Sound Air1 FCC ID: 2AZ43-ET23A 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 : Guogui Huang /Manager Contact information / address: FLAT/RM 07 BLK B 5/F KING YIP FACTORY BUILDING 59 KING YIP STREET KWUN TONG HongKong, CHINA

MOSWS INTERNATIONAL LIMITED 2023.10.7 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 : Guogui Huang /Manager Contact information / address: FLAT/RM 07 BLK B 5/F KING YIP FACTORY BUILDING 59 KING YIP STREET KWUN TONG HongKong, CHINA

MOSWS INTERNATIONAL LIMITED Model Difference Product description: Portable Speaker Model name: ET23A Sound Air1 Trade Name: Bobtot FCC ID: 2AZ43-ET23A All the model are the same circuit and RF module, except model names. Regards Sincerely Client’s signature: Client’s name / title : Guogui Huang /Manager Contact information / address: FLAT/RM 07 BLK B 5/F KING YIP FACTORY BUILDING 59 KING YIP STREET KWUN TONG HongKong, CHINA

External Photos

Internal Photos Antenna

RF EXPOSURE EVALUATION METHOD FCC ID: 2AZ43-ET23A 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. Mode Frequency (MHz) Conducted Power (dBm) Limit (dBm) Verdict GFSK 2402 -5.04 21 Pass GFSK 2441 -4.77 21 Pass GFSK 2480 -5.29 21 Pass π/ 4 DQPSK 2402 -4.14 21 Pass π/ 4 DQPSK 2441 -3.93 21 Pass π/ 4 DQPSK 2480 -4.50 21 Pass 8DPSK 2402 -3.57 21 Pass 8DPSK 2441 -3.37 21 Pass 8DPSK 2480 -3.91 21 Pass max possible output power (PK,conducted)：-3±1dBm -0.68dBi logarithmic terms convert to numeric result is nearly 0.855 -2dBm=0.63mW 2402MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.63/5*√2.402=0.20≤3.0 2441MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.63/5*√2.441=0.20≤3.0 2480MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.63/5*√2.48=0.20≤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.

Inverted F Antenna Specification Summary ITEMANT SPEC Model Name 2.4G ANT HorizontalVertical 2400MHz 2400MHz2500MHz2400MHz2400MHz 2500MHz Center Frequency -1.73-0.84-0.68-6.15-3.70-2.32 MAX. Gain -0.68 PolarizationHorizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance50 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) MaxMinAvg 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) MaxMinAvg 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.

No.：BCTC/RF-EMC-007 Page: 1 of 80 Edition：B.0 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2308995212E Applicant: MOSWS INTERNATIONAL LIMITED Product Name: Portable Speaker Model/Type Reference: ET23A Tested Date: 2023-08-04 to 2023-08-14 Issued Date: 2023-08-14 Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 2 of 80 Edition：B.0 FCC ID:2AZ43-ET23A 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: Portable Speaker Trademark: Bobtot Model/Type Reference: ET23A Sound Air1 Prepared For: MOSWS INTERNATIONAL LIMITED Address: FLAT/RM 07 BLK B 5/F KING YIP FACTORY BUILDING 59 KING YIP STREET KWUN TONG HongKong, CHINA Manufacturer: SHENZHEN CITY ENKOR ELECTRONICS LTD. Address: The 101, 201, 301 of Building 1, building 3, Plant No.4, Tianyang Third Road, Dongfang Community, Songgang Street, Bao'an District, Shenzhen City 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: 2023-08-04 Sample tested Date: 2023-08-04 to 2023-08-14 Issue Date: 2023-08-14 Report No.: BCTC2308995212E 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.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 3 of 80 Edition：B.0 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 ...................................................................................... 9 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List ........................................................................................................ 10 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 .......................................................................................................... 14 7. Radiated emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test procedure .................................................................................................... 18 7.4 EUT operating Conditions ................................................................................... 19 7.5 Test Result .......................................................................................................... 20 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 24 8.1 Block Diagram Of Test Setup .............................................................................. 24 8.2 Limit .................................................................................................................... 24 8.3 Test procedure .................................................................................................... 25 8.4 EUT operating Conditions ................................................................................... 25 8.5 Test Result .......................................................................................................... 26 9. Spurious RF Conducted Emissions ..................................................................... 27 9.1 Block Diagram Of Test Setup .............................................................................. 27 9.2 Limit .................................................................................................................... 27 9.3 Test procedure .................................................................................................... 27 9.4 Test Result ...........................................…

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Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 62 of 80 Edition：B.0 Test Graphs CFS NVNT 1-DH1 2402MHz CFS NVNT 1-DH1 2441MHz Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 63 of 80 Edition：B.0 CFS NVNT 1-DH1 2480MHz CFS NVNT 2-DH1 2402MHz Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 64 of 80 Edition：B.0 CFS NVNT 2-DH1 2441MHz CFS NVNT 2-DH1 2480MHz Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 65 of 80 Edition：B.0 CFS NVNT 3-DH1 2402MHz CFS NVNT 3-DH1 2441MHz Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 66 of 80 Edition：B.0 CFS NVNT 3-DH1 2480MHz Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 67 of 80 Edition：B.0 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.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 68 of 80 Edition：B.0 Test Graphs Hopping No. NVNT 1-DH1 2441MHz Hopping No. NVNT 2-DH1 2441MHz Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 69 of 80 Edition：B.0 Hopping No. NVNT 3-DH1 2441MHz Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 70 of 80 Edition：B.0 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: 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. Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 71 of 80 Edition：B.0 Modulation Channel Data Packet pulse time(ms) Dwell Time(s) Limits(s) GFSK Middle 1DH1 0.377 0.121 0.4 1DH3 1.632 0.261 0.4 1DH5 2.880 0.307 0.4 π/ 4 DQPSK Middle 2DH1 0.379 0.121 0.4 2DH3 1.638 0.262 0.4 2DH5 2.885 0.308 0.4 8DPSK Middle 3DH1 0.386 0.124 0.4 3DH3 1.636 0.262 0.4 3DH5 2.888 0.308 0.4 Test Graphs Dwell NVNT 1-DH1 2441MHz One Burst Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 72 of 80 Edition：B.0 Dwell NVNT 1-DH3 2441MHz One Burst Dwell NVNT 1-DH5 2441MHz One Burst Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 73 of 80 Edition：B.0 Dwell NVNT 2-DH1 2441MHz One Burst Dwell NVNT 2-DH3 2441MHz One Burst Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 74 of 80 Edition：B.0 Dwell NVNT 2-DH5 2441MHz One Burst Dwell NVNT 3-DH1 2441MHz One Burst Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 75 of 80 Edition：B.0 Dwell NVNT 3-DH3 2441MHz One Burst Dwell NVNT 3-DH5 2441MHz One Burst Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 76 of 80 Edition：B.0 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 Internal antenna, fulfill the requirement of this section. Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 77 of 80 Edition：B.0 16. EUT Photographs EUT Photo NOTE: Appendix-Photographs Of EUT Constructional Details Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 78 of 80 Edition：B.0 17. EUT Test Setup Photographs Conducted emissions Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 79 of 80 Edition：B.0 Radiated Measurement Photos Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 80 of 80 Edition：B.0 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 quality system of our laboratory is in accordance with ISO/IEC17025. 8. If there is any objection to this …

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Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 78 of 80 Edition：B.0 17. EUT Test Setup Photographs Conducted emissions Report No.: BCTC2308995212E No.：BCTC/RF-EMC-007 Page: 79 of 80 Edition：B.0 Radiated Measurement Photos