2AYOQ-MRX150MARINE

7 FCC Statement: 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. ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassB digital device,pursuanttopart15oftheFCCRules.Theselimitsaredesignedtoprovide reasonable protection against harmful interference in a residential installation. This equipmentgenerates,usesandcanradiateradiofrequencyenergyand,ifnotinstalled andusedinaccordancewiththeinstructions,maycauseharmfulinterferencetoradio communications.However,thereisnoguaranteethatinterferencewillnotoccurina particularinstallation.Ifthisequipmentdoescauseharmfulinterferencetoradioor televisionreception,whichcanbedeterminedbyturningtheequipmentoffandon, 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. Caution: Any changes or modifications not expressly approved by the party responsible forcompliance couldvoid theuser's authority tooperate theequipment. ThisequipmentcomplieswithFCCradiationexposurelimitssetforthforanuncontrolled environment. Thistransmitter must not be co-located or operatingin conjunctionwith any other antenna or transmitter. Thisequipmentshouldbeinstalledandoperatedwithminimumdistance20cmbetweenthe radiator&your body.

SPIRIT LLC Agent Authorization Letter 2022-12-25 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,MIAMI,Florida, 33169,United States Tel / Fax +19545920227/+1561245223 E-Mail: [email protected]

SPIRIT LLC Long Term Confidentiality Request Letter 2022-12-25 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR (FCC ID: 2AYOQ-MRX150) 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,MIAMI,Florida,33169, United States Tel / Fax +19545920227/+1561245223 E-Mail: [email protected]

Model No.: MRX150 FRONT VIEW OF SAMPLE BACK VIEW OF SAMPLE Model No.: MRX150 LEFT VIEW OF SAMPLE RIGHT VIEW OF SAMPLE Model No.: MRX150 TOP VIEW OF SAMPLE BOTTOM VIEW OF SAMPLE Model No.: MRX150 Overall photo

note：The FCC warning is reflected in the specification. label and label size： 30mm*15mm Label location Product name：MARINE Product model：MRX150 FCC ID: 2AYOQ‐MRX150 manufacturer：SPIRIT LLC

Model No.: MRX150 Page 1 of 3 INTERNAL PHOTO OF SAMPLE INTERNAL PHOTO OF SAMPLE INTERNAL PHOTO OF SAMPLE PCB Model No.: MRX150 Page 2 of 3 INTERNAL PHOTO OF SAMPLE PCB Model No.: MRX150 Page 3 of 3 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Antenna Location

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.. .......................................... : MTEB22120048-H 2AYOQ-MRX150 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 ..................................... : December 08,2022 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,MIAMI,Florida, 33169,United States 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 Trade Mark ....................................... : DS18 Manufacturer .................................... : SPIRIT LLC Model/Type reference....................... : MRX150 Listed Models .................................. : N/A Modulation Type ............................... : GFSK, π/4DQPSK, 8DPSK Operation Frequency ........................ : From 2402MHz to 2480MHz Hardware Version .............................. MB PCB 1120-MRX301-MB01 VER Software Version ............................... MRX150_V1.05 Rating ................................................ DC 12V Result................................................ : PASS Report No.: MTEB22120048-H Page 2 of 5 T E S T R E P O R T Equipment under Test : MARINE Model /Type : MRX150 Listed Models : N/A Remark N/A Applicant : SPIRIT LLC Address : 1400 NW 159th ST BAY 101 MIAMI Gardens,MIAMI,Florida, 33169,United States Manufacturer : SPIRIT LLC Address : 1400 NW 159th ST BAY 101 MIAMI Gardens,MIAMI,Florida, 33169,United States 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.: MTEB22120048-H Page 3 of 5 1. Revision History Revision Issue Date Revisions Revised By 00 2022.12.08 Initial Issue Alisa Luo Report No.: MTEB22120048-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.: MTEB22120048-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) 4.230 4.230±1 5.230 Middle(2441MHz) 3.998 3.998±1 4.998 Highest(2480MHz) 4.121 4.121±1 5.121 π/4DQPSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402MHz) 4.010 4.010±1 5.010 Middle(2441MHz) 4.360 4.360±1 5.360 Highest(2480MHz) 3.978 3.978±1 4.978 8DPSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402MHz) 4.111 4.111±1 4.111 Middle(2441MHz) 4.032 4.032±1 5.032 Highest(2480MHz) 3.899 3.899±1 4.899 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(2441MHz) 5.360 3.43 -2 0.0004 1.0 Pass Note: 1) Refer to report MTEB22111697-R for EUT test Max Conducted average Output Power value. Note: 2) Pd = (Pout*G)/(4* Pi * R2)=(3.43*0.63)/(4*3.1416*20 2 )=0.0004 Note: 3) EUT's Bluetooth module is more than 20cm away from the human body.. .......................THE END OF REPORT.........................

Antenna Specification PART I 3D Radiation Pattern 2400MHz 2440MHz 2480MHz Gain： Frequency Gain(dBi) 2400Mhz ‐2.11 2410Mhz ‐3.21 2420Mhz ‐2.85 2430Mhz ‐2.54 2440Mhz ‐2.01 2450Mhz ‐2.00 2460Mhz ‐2.13 2470Mhz ‐3.89 2480Mhz ‐2.57 2490Mhz ‐2.98 2500Mhz ‐3.36 Part II Dimensions: Manufacturer: SPIRIT LLC Address: 1400 NW 159th ST ( BAY 101 ) Miami Gardens , FL 33169

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......................: MTEB22120048-R FCC ID............................................ : 2AYOQ-MRX150 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.....................................: December 08,2022 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,MIAMI,Florida, 33169,United States 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 Trade Mark .......................................: DS18 Manufacturer ....................................: SPIRIT LLC Model/Type reference.......................: MRX150 Listed Models ..................................: N/A Modulation Type ...............................: GFSK, π/4DQPSK, 8DPSK Operation Frequency........................: From 2402MHz to 2480MHz Hardware Version.............................. MB PCB 1120-MRX301-MB01 VER Software Version ............................... MRX150_V1.05 Rating ................................................ DC 12V Result................................................: PASS Report No.: MTEB22120048-R Page 2 of 40 T E S T R E P O R T Equipment under Test : MARINE Model /Type : MRX150 Listed Models : N/A Remark N/A Applicant : SPIRIT LLC Address : 1400 NW 159th ST BAY 101 MIAMI Gardens,MIAMI,Florida, 33169,United States Manufacturer : SPIRIT LLC Address : 1400 NW 159th ST BAY 101 MIAMI Gardens,MIAMI,Florida, 33169,United States 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.: MTEB22120048-R Page 3 of 40 Contents 1 REVISION HISTOR Y ................................................................ 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 ENVIRONMEN T ............................................................... 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 R ESULTS ............................................................................... 1 2 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 T E S T S E T U P P H OT O S O F T H E E U T ............................................................................... 3 9 7 PHOTOS OF THE EUT ...................................................................................................... 4 0 ................................................................................................................................................................. Report No.: MTEB22120048-R Page 4 of 40 1 Revision History Revision Issue Date Revisions Revised By 00 2022-12-08 Initial Issue Alisa Luo Report No.: MTEB22120048-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.: MTEB22120048-R Page 6 of 40 Power supply voltage : ○ 230V / 50 Hz ○ 120V / 60Hz ● 12 V DC ○ 24 V DC ○ Other (specified in blank below) 3 S U M M A R Y 3.1 General Remarks Date of receipt of test sample : 2022.12.01 Testing commenced on : 2022.12.02 Testing concluded on : 2022.12.07 3.2 Product Description Product Name: MARINE Model/Type reference: MRX150 Power Supply： DC12V Testing sample ID： MT22120020 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 3.4 Short description of the Equipment under Test (EUT) This is a MARINE For more details,…

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Model No.: MRX150 RE TEST SETUP RE TEST SETUP