Y9ZMRX21A1WS7WS ALERT XPV Headset

Rev 1/26/2023 To: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 3, 2024 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID:Y9ZMRX21A1WS7 3M Company (“the applicant”) certifies that, as of the date of the filing of the application, 3M Company is our designated U.S. agent for service of process for the above referenced FCC ID. 3M Company 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. 3M Company accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Name: 3M Company Address: 7911 Zionsville Rd, Indianapolis, IN 46268 FRN: 0005881040 Contact Person: Yuriy Litvinov Phone: 1-651-778-6336 Email: [email protected] Sincerely, 3M Company (U.S. agent company name printed name) Yury Litvinov U.S. agent company name signature

Date: September 3, 2024 To: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA Ref: Attestation Statements Part 2.911(d)(5)(i) and Part 2.911(d)(5)(ii) Filing Re. KDB 986446 D01 FCC ID:Y9ZMRX21A1WS7 Dear Sir or Madam, 3M Company (“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. We also certify 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. If you have any questions, please contact us. Sincerely, Yuriy Litvinov 3M Company, EHS and Product Stewardship Lead EMC Engineer 3M EMC Laboratory, Building 76 St. Paul, MN 55107-1208 Office: 651 778 6336 [email protected]

September 3, 2024 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 FCC ID:Y9ZMRX21A1WS7 To whom it may concern, Pursuant to Sections 0.457(d)(1)(ii) and 0.459 of the Commission’s Rules, 3M Company hereby requests permanent confidential treatment of information accompanying this application as outlined below: Schematics Block Diagrams Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rule 0.457(d)(1)(ii), disclosure of this Application and all accompanying materials will not be made before the date of the Grant for this Application. Yuriy Litvinov, Lead EMC Engineer EHS and Product Stewardship, 3M EMC Laboratory 410 E. Fillmore Ave. St. Paul, MN 55107-1208 Office: +1 651 778 6336 [email protected]

September 3, 2024 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Short-term Confidentiality FCC ID:Y9ZMRX21A1WS7 To whom it may concern, Request is hereby submitted by 3M Company to withhold from public review for a period of 180 days from the date of the Grant of Equipment Authorization and prior to marketing, certain portions of the application for equipment certification for the referenced FCC identifier. This request for confidentiality is made pursuant to 47 CFR 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept confidential for a period of 180 days in addition to the Long-Term confidentiality request from the date of Authorization: • Test setup photos • External photos • Internal photos • User Manual 3M Company has invested considerable time and materials in research and development to produce the referenced product. Disclosure of the short-term confidential portions of this application during the period of importation and/or distribution would reveal key aspects of proprietary technology to competitors and diminish the value of our investment in research and development. The Applicant understands that pursuant to Rule 0.457(d)(1)(ii), disclosure of this Application and all accompanying materials will not be made before the date of the Grant for this Application. Yuriy Litvinov, Lead EMC Engineer EHS and Product Stewardship, 3M EMC Laboratory 410 E. Fillmore Ave. St. Paul, MN 55107-1208 Office: +1 651 778 6336 [email protected]

Scale Material First revision engineered Document type, product number, document description First revision checked 1 First revision checked 2 First revision checked 3 First revision approvedDocument name/numberRevisionPage (1) . Assembly Drawing MRX21A1WS7 WS ALERT XPV P210217a1KAPU 2024-02-05 2024-02-05 DSPB 2024-02-06 GWPU TEPU 2021-12-07 © 3M Svenska AB Värnamo, Sweden TM This document is our property and copyright subsists thereon. Without our written permission, it may not be copied, disclosed or otherwise divulged or made available to third parties, or be used as a basis for production or manufacture for others than us. Offenders will be prosecuted. 2:5 Isometric view.1 Scale: 1:2 1 4 5 6 7 8 10 9 11 12 14 15 16 17 19 20 18 13 2 3 21

3M EMC Laboratory Report Number: HRE202303408-4 Date: September 12, 2024 Page 23 of 24 4.8 RF Exposure Evaluation Reference Standard(s): KDB 447498 RF Exposure Guidance v06 KDB 447498 Interim RF Exposure Guidance v01 RSS 102, Issue 5 MPE SAR Evaluation SAR Test Exclusion Frequency Range(s): 911-918.5MHz 2402-2480.0MHz Antenna Separation Distance: >40mm RF Exposure Conditions: Portable (Body-worn) 2.4GHz Antenna Gain: 2.7dBi BT EDR the source-based conducted output power: 3.0mW(4.8dBm)*0.7(FHSS worst case duty cycle)= 2.1mW(3.2dBm) BT EDR EIRP/ERP output power: EIRP=3.2dBm + 2.7dBi=5.9dBm, ERP=5.9dBm - 2.15dB=3.75dBm(2.4mW) BLE the source-based conducted output power: 1.3mW(1dBm)*0.85(worst case duty cycle)=1.1mW(0.4dBm) BLE EIRP/ERP output power: EIRP=0.4dBm + 2.7dBi=3.1dBm, ERP=3.1dBm - 2.15dB= 0.95dBm(1.2mW) The SAR Exclusion Threshold Level FCC Part 2.1093 77mW<40mm @2.45GHz RSS 102, Issue 5 173mW>40mm @2.45GHz Note:

This report is the confidential property for the exclusive internal use of 3M Company and applies only to the specific item tested under the stated test conditions. This test report shall not be reproduced except in full, without written approval of the 3M EMC laboratory and must not be used to claim product certification, approval, or endorsement by NVLAP, NIST, or any agency of the U.S. Government. Any changes impacting the attributes, functionality or operational characteristics documented in this report shall be communicated to the body responsible for approving (certifying) the subject equipment. EMC TEST REPORT NVLAP Lab Code 200033-0 Standard(s): 47 CFR FCC Part 15.247 RSS 247, Issue 3, 2023 FCC ID:Y9ZMRX21A1WS7 IC:4406A-MRX21A1WS7 Product: WS™ ALERT™ XPV Headset (EDR) Model(s): MRX21A1WS7-NA Company Name: 3M Svenska AB 3M Division: PSD Address: Box 2341, Malmstensgatan 19 SE-33102 Värnamo, Sweden Report Number: HRE202303408-5 Report Issue Date: September 13, 2024 Report Prepared by: Signature: Yuriy Litvinov Lead EMC Engineer Tested by: 3M Company, Hardgoods Regulatory Engineering Laboratory 410 East Fillmore Avenue, Building 76 St. Paul, Minnesota 55107-1208, USA 3M EMC Laboratory Report Number: HRE202303408-5 Date: September 13, 2024 Page 2 of 40 TABLE OF CONTENTS Item Description Page 1.0 Test Summary 3 1.1 Measurement Uncertainty 3 1.2 Test Facility 3 2.0 Equipment Description 4 2.1 Equipment Under Test 4 3.0 EUT Configuration 5 3.1 System Configuration 5 3.2 Input/Output Ports of EUT 5 3.3 Cables 5 3.4 Measurement Arrangements of EUT 5 3.5 Primary functions(s) of EUT 5 3.6 Exercising of EUT and Interfaces 5 4.0 Test Conditions and Results 6 4.1 20dB Bandwidth 6 4.2 Maximum Peak Conducted Output Power 8 4.3 Channel Separation 9 4.4 Number of Channels 11 4.5 Time of Occupancy 19 4.6 Radiated Emissions in restricted band 21 4.7 Radiated Emissions in non-restricted band 33 4.8 Band-edge Emissions Measurements 35 4.9 Conducted Emissions 37 4.10 RF Exposure Evaluation 39 5.0 Test Equipment 40 6.0 Revision History 40 3M EMC Laboratory Report Number: HRE202303408-5 Date: September 13, 2024 Page 3 of 40 1.0 Test Summary Based on the results of our investigation, we have concluded the product tested comply with the requirements of the standard(s) indicated. The results obtained in this test report pertain only to the item(s) tested. Requirement – Test Test Description Result Comments 4.1 FCC Part 15.247(a)(1)/ RSS-247(5.1(a)) 20dB Bandwidth pass 4.2 FCC Part 15.247(b)(1)/ RSS-247(5.4(b)) Maximum Peak Conducted Output Power pass 4.3 FCC Part 15.247(a)(1)/ RSS-247(5.1(c)) Channel Separation pass 4.4 FCC Part 15.247(a)(1)/ RSS-247(5.1(d)) Number of Channels pass 4.5 FCC Part 15.247(a)(1)/ RSS-247(5.1(4)) Time of Occupancy pass 4.6 FCC Part 15.209 RSS-Gen, 8.9 Radiated Emissions in restricted band pass 4.7 FCC Part 15.247(d)/ RSS-247(5.5) Radiated Emissions in non-restricted band pass 4.8 FCC Part 15.247(d)(1)/ RSS-247(5.5) Band-edge Emissions Measurements pass 4.9 FCC Part 15.207/ RSS-Gen (8.8) Conducted Emissions pass 4.10 FCC Part 15.247(i)/ RSS 102 Issue 5 RF Exposure Compliance pass Note: 1.1 Measurement Uncertainty The measured value related to the corresponding limit will be used to decide whether the equipment meets the requirements. The measurement uncertainty figures were calculated and correspond to a coverage factor of k=2, providing a confidence level of respectively 95.45 % in the case where the distributions characterizing the actual measurement uncertainties are normal (Gaussian). Radiated emissions 30MHz to 1000MHz 4.9 dB Radiated emissions 1GHz to 18GHz 4.6 dB Conducted emissions 150KHz to 30MHz (AMN) 2.7 dB Conducted emissions 150KHz to 30MHz (AAN) 1.92 dB RF frequency ±3 × 10 –8 RF power, conducted 1.4 dB RF Power Spectral Density 0.96 dB 1.2 Test Facility Test Facility Accreditations: ISO/IEC 17025:2017, NVLAP LAB CODE: 200033-0 FCC OET Designation Number: US5320 ISED CAB identifier: US0012 Chinese Taipei - (NCC) CAB identifier: US0012 3M EMC Laboratory Report Number: HRE202303408-5 Date: September 13, 2024 Page 4 of 40 2.0 Equipment Description 2.1 Equipment Under Test Description: WS ALERT XPV Headset helps protect against hazardous noise, has Bluetooth wireless communication, noise-cancelling boom microphone, and level-dependent function for ambient listening. Model(s): MRX21A1WS7-NA Serial number: 128837-2 3M Division: Personal Safety Modifications and Special Measures: none Frequency Range: 2402.0-2480.0 MHz Channel No.: 79 Modulation Type: GFSK, π/4-DQPSK and 8DPSK FCC Classification: Spread Spectrum Transmitter (DSS) Output Power EIRP: 7.5dBm (5.6mW), (4.8dBm Conducted RF Power) Antenna Type and Antenna Assembly Gain: External Integral PCB Antenna Dedicated 2.7dBi Declared by the Manufacturer Measured Test Deviations or Exclusions Yes No Rated Power: Voltage: 120VAC 230VAC 3VDC Phase: 1ph 3ph USB-C Frequency: 50Hz 60Hz Current: N/A Test Dates: 02/05-02/13/2024 Received Date: 01/15/2024 Received Conditions: Poor Good Prototype Production 3M EMC Laboratory Report Number: HRE202303408-5 Date: September 13, 2024 Page 5 of 40 3.0 EUT Configuration 3.1 System Configuration No. Product Type Manufacturer Model Comments 1 EUT 3M MRX21A1WS7 2 USB Charger Apple M1385 Support Equipment 3 Programming interface Qualcomm TRBI200 Support Equipment 3.2 Input/Output Ports of EUT No. Description Type Comments 1 DC Power USB-C 2 3.3 Cables No. Description Type Length Shielding Comments 1 USB-C USB 2.0 1m Yes 2 3.4 Measurement Arrangements of EUT Intended Operational Arrangement(s) Comments Table-top only Floor-standing only Floor-standing or table-top Other Body-worn 3.5 Exercising of EUT and Interfaces No. Mode of Operation 1 Transmitting at lowest (0), middle (19) and highest (39) channels of operation with unmodulated CW carrier 2 Continuous transmission of modulated signal at lowest (0), middle (19) and highest (39) channels 3 Device programming using Qualcomm Bluesuit WIN.3.3…

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Doc name Revision Page First revision creator ANTENNA SPEC XPI a.00 1 of 3 HSPU 2017-03-17 Doc Type, Product Number, Doc Description Scale First revision checked 1 N/A Technical information First revision checked 2 MRX21AWS6 Antenna specs WS Alert XPI First revision checked 3 First revision approved No Rev ECR Changed Checked Approved a.00 HSPU 2017-03-17 © 3M Svenska AB Värnamo, Sweden 1 Revision History a.00 HSPU Creation of document. 2 Technical information of the K388A PCB antenna The antenna was tuned in the 3M RnD lab on a prototype and after receiving new PCBAs with the new antenna it was measured at Shortlink Compliance Lab. Finished antenna design: Doc name Revision Page First revision creator ANTENNA SPEC XPI a.00 2 of 3 HSPU 2017-03-17 Doc Type, Product Number, Doc Description Changed Technical information HSPU 2017-03-17 MRX21AWS6 Antenna specs WS Alert XPI © 3M Svenska AB Värnamo, Sweden 3 Measurements 3.1 S11 plots Doc name Revision Page First revision creator ANTENNA SPEC XPI a.00 3 of 3 HSPU 2017-03-17 Doc Type, Product Number, Doc Description Changed Technical information HSPU 2017-03-17 MRX21AWS6 Antenna specs WS Alert XPI © 3M Svenska AB Värnamo, Sweden 3.1.1 VSWR 3.2 Maximum gain The measurement below were done in the X-plane, which is the scenario in which the product is used. The maximum gain was measured to 2.70dBi at 2483MHz.