2AYOQ-MXRCBTMARINE STREAMING AUDIO RECEIVER

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SPIRIT LL 1400 NW Rev 1/2 Federal C Authoriz 7435 Oa Columbi USA Date: 08 Ref: At t FCC ID:2 SPIRIT L L prohibite Sincerel y SPIRIT L L LC W 159th ST 6/2023 Communicat zation and Ev kland Mills R a, MD 21046 ‐Feb‐2023 testation Sta AYOQ‐ MXR C LC certifies t ed from rece y, LC ( BAY 101 ) tions Commi valuation Div Road 6 tements Pa r CBT that the equi eiving an equ ) Miami Gar ssion vision rt 2.911(d)(5 ipment for w uipment auth rdens , FL 33 )(i) Filing which author horization pu 3169 rization is sou ursuant to se ught is not “ ection 2.903 covered” eq of the FCC r uipment ules. SPIRIT LL 1400 NW Rev 1/2 Federal C Authoriz 7435 Oa Columbi USA Date: 08 Ref: At t FCC ID: 2 SPIRIT L L the Cove Sincerel y SPIRIT L L LC W 159th ST 6/2023 Communicat zation and Ev kland Mills R a, MD 21046 ‐Feb‐2023 testation Sta 2AYOQ‐ MXR LC certifies t ered List as a y, LC ( BAY 101 ) tions Commi valuation Div Road 6 tements Pa r RCBT that, as of th n entity pro d ) Miami Gar ssion vision rt 2.911(d)(5 e date of th e ducing “cove rdens , FL 33 )(ii) Filing e filing of the ered” equipm 3169 e application ment. n, the applicaant is not ideentified on

Attestation Statements (2023‐02‐22) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID: 2AYOQ‐MXRCBT) (SPIRIT LLC ), the undersigned, hereby authorize (SPIRIT LLC) to act as our designated U.S. agent for service of process, (SPIRIT LLC) 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 the equipment. (SPIRIT LLC) accepts the responsibility to act as designated U.S. agent for service of process, provides 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 the equipment. Applicant Information： Company name: SPIRIT LLC Contact Name: Alberto Susterman Address: 1400 NW 159TH ST, BAY 101 MIAMI GARDENS, FL 33169 MIAMI, Florida, United States, 33169 Telephone No: +19545920227 Email: [email protected] U.S. Agent Information: Company name: SPIRIT LLC Contact Name: Alberto Susterman Address: 1400 NW 159TH ST, BAY 101 MIAMI GARDENS, FL 33169 MIAMI, Florida, United States, 33169 Telephone No: +19545920227 Email: [email protected] Applicant Signature: Agent Signature: (if the agent is different from the applicant) Applicant printed name: Alberto Susterman Agent printed name:

SPIRIT LLC Agent Authorization Letter 2023-02-22 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen Most Technology Service 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, Name: Alberto Susterman Position: CEO Company Name: SPIRIT LLC Address: 1400 NW 159TH ST, BAY 101 MIAMI GARDENS, FL 33169 MIAMI, Florida, United States, 33169 Tel / Fax +19545920227 /+1561245223 E-Mail: [email protected]

SPIRIT LLC Long Term Confidentiality Request Letter 2023-02-22 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR (FCC ID: 2AYOQ-RVR1) 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 - e.g. Block diagram - e.g. SCH - e.g. Operational Description required to be submitted with this application be permanently withheld from public review. The above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, Name: Alberto Susterman Position: CEO Company Name: SPIRIT LLC Address: 1400 NW 159TH ST, BAY 101 MIAMI GARDENS, FL 33169 MIAMI, Florida, United States, 33169 Tel / Fax +19545920227 /+1561245223 E-Mail: [email protected]

Model No.: MXRC-BT FRONT VIEW OF SAMPLE BACK VIEW OF SAMPLE Model No.: MXRC-BT LEFT VIEW OF SAMPLE RIGHT VIEW OF SAMPLE Model No.: MXRC-BT TOP VIEW OF SAMPLE BOTTOM VIEW OF SAMPLE

Label: product name: MARINE STREAMING AUDIO RECEIVER product model: MXRC‐BT FCC ID: 2AYOQ‐MXRCBT manufacturer: SPIRIT LLC note: FCC ID warning words are reflected in the instructions. Label location size:30mm*20mm

Model No.: MXRC-BT Page 1 of 2 INTERNAL PHOTO OF SAMPLE INTERNAL PHOTO OF SAMPLE Antenna Location Model No.: MXRC-BT Page 2 of 2 INTERNAL PHOTO OF SAMPLE PCB

Shenzhen Most Technology Service Co., Ltd. No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. RF Exposure Evaluation Report Report Reference No. ..................... : FCC ID.. .......................................... : MTEB22120258-H 2AYOQ-MXRCBT Compiled by ( position+printed name+signature) .. : File administrators Alisa Luo Supervised by ( position+printed name+signature) .. : Test Engineer Sunny Deng Approved by ( position+printed name+signature) .. : Manager Yvette Zhou Date of issue ..................................... : January 01,2023 Representative Laboratory Name .: Shenzhen Most Technology Service Co., Ltd. Address ............................................ : No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. Applicant’s name ............................ : SPIRIT LLC Address ............................................ : 1400 NW 159th ST ( BAY 101 ) Miami Gardens , FL 33169 Test specification/ Standard ..........: 47 CFR Part 1.1307 47 CFR Part 1.1310 KDB447498D01 General RF Exposure Guidance v06 TRF Originator .................................. : Shenzhen Most Technology Service Co., Ltd. Shenzhen Most Technology Service Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Most Technology Service Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Most Technology Service Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : MARINE STREAMING AUDIO RECEIVER Trade Mark ....................................... : N/A Manufacturer .................................... : SPIRIT LLC Model/Type reference....................... : MXRC-BT Listed Models .................................. : N/A Modulation Type ............................... : GFSK, π/4DQPSK, 8DPSK Operation Frequency ........................ : From 2402MHz to 2480MHz Hardware Version .............................. 1121-MXRCBT-KB02 Software Version ............................... LQFP48-7 Rating ................................................ DC 12V Result................................................ : PASS Report No.: MTEB22120258-H Page 2 of 5 T E S T R E P O R T Equipment under Test : MARINE STREAMING AUDIO RECEIVER Model /Type : MXRC-BT Listed Models : N/A Remark N/A Applicant : SPIRIT LLC Address : 1400 NW 159th ST ( BAY 101 ) Miami Gardens , FL 33169 Manufacturer : SPIRIT LLC Address : 1400 NW 159th ST ( BAY 101 ) Miami Gardens , FL 33169 Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: MTEB22120258-H Page 3 of 5 1. Revision History Revision Issue Date Revisions Revised By 00 2023.02.01 Initial Issue Alisa Luo Report No.: MTEB22120258-H Page 4 of 5 2. SAR Evaluation 2.1 RF Exposure Compliance Requirement 2.1.1 Standard Requirement According to §1.1307(e)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to §1.1310 and §2.1091 RF exposure is calculated. KDB447498 D01: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 2.1.2 Limits F= Frequency in MHz Friis Formula Friis transmission formula: Pd = (Pout*G)/(4* Pi * R 2) Where Pd = power density in mW/cm2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Report No.: MTEB22120258-H Page 5 of 5 2.1.3 EUT RF Exposure Antenna Gain: -2dBi Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2.4 in linear scale. Output Power Into Antenna & RF Exposure Evaluation Distance: BT classic GFSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402MHz) 0.332 0.332±1 1.332 Middle(2441MHz) 0.317 0.317±1 1.317 Highest(2480MHz) -0.124 -0.124±1 0.876 π/4DQPSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402MHz) 0.523 0.523±1 1.523 Middle(2441MHz) -1.058 -1.058±1 -0.058 Highest(2480MHz) -1.144 -1.144±1 -0.144 8DPSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402MHz) -0.361 -0.361±1 0.639 Middle(2441MHz) -0.123 -0.123±1 0.877 Highest(2480MHz) -0.231 -0.231±1 0.769 BT classic Worst case: π/4DQPSK Channel Maximum Peak Conducted Output Power (dBm) Maximum Peak Conducted Output Power (MW) Antenna Gain (dBi) Powe r Density at R = 20 cm (mW/cm2) Limit Result Highest(2402MHz) 1.523 1.42 -2 0.0001 1.0 Pass Note: 1) Refer to report MTEB22120258-R for EUT test Max Conducted average Output Power value. Note: 2) Pd = (Pout*G)/(4* Pi * R2)=(1.42*0.63)/(4*3.1416*20 2 )=0.0001 Note: 3) EUT's Bluetooth module is more than 20cm away from the human body.. .......................THE END OF REPORT.........................

Antenna Specification PART I 3D RadiationPattern 2400MHz 2440MHz Qingdao Magene Intelligence Technology Co., Ltd. 2480MHz Frequency Range(MHz) 240024402480 GainX（dBi） -2.1-2.3 -2.9 GainY（dBi） -2.3-2.5 -2.5 GainZ（dBi） -2.5-2.0 -3.3

Shenzhen Most Technology Service Co., Ltd. No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. TEST REPORT FCC Rules Part 15.247 Report Reference No. .....................: FCC ID.. .......................................... : MTEB22120258-R 2AYOQ-MXRCBT Compiled by ( position+printed name+signature) .. : File administrators Alisa Luo Supervised by ( position+printed name+signature) .. : Test Engineer Sunny Deng Approved by ( position+printed name+signature) .. : Manager Yvette Zhou Date of issue ..................................... : January 01,2023 Representative Laboratory Name .: Shenzhen Most Technology Service Co., Ltd. Address ............................................ : No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. Applicant’s name ............................ : SPIRIT LLC Address ............................................ : 1400 NW 159th ST ( BAY 101 ) Miami Gardens , FL 33169 Test specification/ Standard ..........: FCC Rules Part 15.247 TRF Originator .................................. : Shenzhen Most Technology Service Co., Ltd. Shenzhen Most Technology Service Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Most Technology Service Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Most Technology Service Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : MARINE STREAMING AUDIO RECEIVER Trade Mark ....................................... : N/A Manufacturer .................................... : SPIRIT LLC Model/Type reference....................... : MXRC-BT Listed Models .................................. : N/A Modulation Type ............................... : GFSK, π/4DQPSK, 8DPSK Operation Frequency ........................ : From 2402MHz to 2480MHz Hardware Version .............................. 1121-MXRCBT-KB02 Software Version ............................... LQFP48-7 Rating ................................................ DC 12V Result................................................ : PASS Report No.: MTEB22120258-R Page 2 of 40 T E S T R E P O R T Equipment under Test : MARINE STREAMING AUDIO RECEIVER Model /Type : MXRC-BT Listed Models : N/A Remark N/A Applicant : SPIRIT LLC Address : 1400 NW 159th ST ( BAY 101 ) Miami Gardens , FL 33169 Manufacturer : SPIRIT LLC Address : 1400 NW 159th ST ( BAY 101 ) Miami Gardens , FL 33169 Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: MTEB22120258-R Page 3 of 40 Contents 1 REVISION HISTORY ................................................................ 4 2 TEST STANDARDS .................................................................. 5 3 SUMMARY ............................................................................. 6 3.1 General Remarks 6 3.2 Product Description 6 3.3 Equipment Under Test 6 3.4 Short description of the Equipment under Test (EUT) 6 3.5 EUT operation mode 7 3.6 Block Diagram of Test Setup 7 3.7 Test Item (Equipment Under Test) Description* 7 3.8 Auxiliary Equipment (AE) Description 7 3.9 Antenna Information* 7 3.10 Related Submittal(s) / Grant (s) 8 3.11 Modifications 8 4 TEST ENVIRONMENT ............................................................... 9 4.1 Address of the test laboratory 9 4.2 Environmental conditions 9 4.3 Summary of measurement results 10 4.4 Statement of the measurement uncertainty 10 4.5 Equipments Used during the Test 11 5 TEST CONDITIONS AND RESULTS ............................................ 12 5.1 AC Power Conducted Emission 12 5.2 Radiated Emission 13 5.3 Maximum Peak Output Power 19 5.4 20dB Bandwidth 20 5.5 Frequency Separation 23 5.6 Number of hopping frequency 26 5.7 Time of Occupancy (Dwell Time) 28 5.8 Spurious RF Conducted Emission 31 5.9 Pseudorandom Frequency Hopping Sequence 37 5.10 Antenna Requirement 38 6 TEST SETUP PHOTOS OF THE EUT .......................................... 39 7 PHOTOS OF THE EUT ............................................................. 40 Report No.: MTEB22120258-R Page 4 of 40 1 Revision History Revision Issue Date Revisions Revised By 00 2023-02-01 Initial Issue Alisa Luo Report No.: MTEB22120258-R Page 5 of 40 2 TEST STANDARDS The tests were performed according to following standards: FCC Rules Part 15.247 : Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz. ANSI C63.10-2013 : American National Standard for Testing Unlicensed Wireless Devices Report No.: MTEB22120258-R Page 6 of 40 3 SUMMARY 3.1 General Remarks Date of receipt of test sample : 2022.12.19 Testing commenced on : 2022.12.19 Testing concluded on : 2022.12.20 3.2 Product Description Product Name: MARINE STREAMING AUDIO RECEIVER Model/Type reference: MXRC-BT Power Supply： DC12V Testing sample ID： MT22120168 Bluetooth : Supported Type: Bluetooth BR/EDR Modulation: GFSK, π/4DQPSK, 8DPSK Operation frequency: 2402MHz~2480MHz Channel number: 79 Channel separation: 1MHz Antenna type: PCB antenna Antenna gain: -2 dBi 3.3 Equipment Under Test Power supply system utilised Power supply voltage : ○ 230V / 50 Hz ○ 120V / 60Hz ● 12 V DC ○ 24 V DC ○ Other (specified in blank below) 3.4 Short description of the Equipment under Test (EUT) This is a MARINE STREAMING AUDIO RECEIVER For more details, refer to the user’s manual of the EUT. Report No.: MTEB22120258-R Page 7 of 40 3.5 EUT operation mode The Applicant provides communication tools software(Engineer mode) to control the EUT for staying in continuous transmitting (Duty Cycle more than 98…

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Model No.: MXRC-BT RE TEST SETUP RE TEST SETUP