DD4SLXD3EG57Plug-on Wireless Transmitter

120623-17rev9 CertificationApplicationAttestationStatements Date:September27,2024 AmericanCertificationBody,Inc. 313ParkAvenue Suite300 FallsChurch,VA22046 ToWhomItMayConcern: Statementfor47CFRsection2.911(d)(5)(i) _____ShureIncorporated_____certifiesthatasofthedateoftheapplicationtheequipmentforwhich authorizationissoughtisnot“covered”equipment 1 prohibitedfromreceivinganequipment authorizationpursuanttosection2.903oftheFCCrules. Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedbyanyoftheentities identifiedonthecurrentCoveredList,includingaffiliatesorsubsidiariesofthenamedcompanies,the applicantmustincludeanexplanationonwhytheequipmentisnot“covered”equipment. AdditionalExplanation:<N/A> Statementfor47CFRsection2.911(d)(5)(ii) _____ShureIncorporated______(“theapplicant”)certifiesthat,asofthedateofthefilingofthis application,theapplicant☐-is/☐-isnot identifiedontheCoveredList(asaspecificallynamedentityoranyofitssubsidiariesoraffiliates– seeKDB986446Question5)asanentityproducing“covered”equipment. Thankyou, By:___________________________JuanCastrejon___ (Signature 2 )(Printname) Title:__EngineerAssociateStaff,GC____ Company:__ShureIncorporated____Telephone:__847-600-8651________ 1 -TheCommission’sCoveredListispublishedbythePublicSafetyandHomelandSecurityBureauandpostedontheCommission’swebsite.This CoveredList,whichisperiodicallyupdated,identifiesparticularequipment,producedbyparticularentities,thatconstitutes“covered”equipment. https://www.fcc.gov/supplychain/coveredlist. 2 -Lettersmustbeplacedonappropriateletterhead.

09 2723-17 Rev 9 U.S. Agent Designation for Service of Process (Applicant is Both Grantee and U.S. Agent) TO: American Certification Body, Inc. 313 Park Avenue Suite 300 Falls Church, VA 22046 ATTENTION: FCC Certification – Section 2.911(d)(7) Information This letter is to confirm that the Applicant will also serve as the U.S. Agent for Service of Process as required by 47 CFR 2.911(d)(7). The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The Applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information changes. Applicant Company name: Shure Incorporated FRN #: 0030683478 Grantee Code: DD4 Contact Name: Juan Castrejon Street Address: 5800 W. Touhy Ave City/Province/Zip: Niles/ Illinois/ 60714-4608 Telephone No: 847-600-8651 Email: [email protected] Applicant Signature 1 : Date: August 9, 2024 Signed by (Printed Name/Title): Juan Castrejon / Engineer Associate Staff, GC 1 - Letters must be placed on appropriate letterhead. The signee for the applicant must be one of the following: Applicant ( grantee) contact of record in the FCC’s authorization system, or authorized officers or employee of the applicant (grantee).

Certification Application Attestation Statements Date: 2025-07-08 American Certification Body, Inc. 313 Park Avenue Suite 300 Falls Church, VA 22046 To Whom It May Concern: _____ Shure Incorporated _____ (“the applicant”) certifies that, as of the date of the filing of this application, the equipment does not contain Kapersky cybersecurity and/or anti-virus software installed in it, and also not integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software. Thank you, By: __________________________ _____ Juan Castrejon ______ (Signature 1 ) (Print name) Title: Engineer Associate Staff, GC Company: Shure Incorporated 1 - Letters must be placed on appropriate letterhead.

061224-33a Request for Confidentiality Date: July 8, 2025 Subject: Confidentiality Request for: _____FCC ID: DD4SLXD3EG57_____ Pursuant to FCC 47 CFR 0.457(d) and 0.459 and IC RSP-100, Section 12.4, the applicant requests that a part of the subject FCC application be held confidential. Type of Confidentiality Requested Exhibit ☐ Short Term ☒ Permanent Block Diagrams ☒ Short Term --------------------------- External Photos ☒ Short Term ☐ Permanent * 1 Internal Photos ☐ Short Term ☒ Permanent Operation Description/Theory of Operation ☐ Short Term ☒ Permanent Parts List & Placement/BOM ☐ Short Term ☒ Permanent Tune-Up Procedure ☐ Short Term ☒ Permanent Schematics ☒ Short Term --------------------------- Test Setup Photos ☒ Short Term ☐ Permanent * 3 User’s Manual ______Shure Incorporated______ has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality: The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public. Short-Term Confidentiality for FCC Applications: The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of __ 180___ days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify ACB in the event information regarding the product or the product is made available to the public before the requested period has expired. ACB will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04-1705. Short Term Confidentiality for Industry Canada Applications: Starting May 2022, ISED will recognize short term confidentiality on certain exhibits until the intended date of marketing. The applicant requests the exhibits selected above as short term confidential be withheld from public view until: (specify ISED expiration date / date of marketing) . Sincerely, By: ___ Engineer Associate Staff, GC ___ _____ Juan Castrejon ____ (Signature/Title 2 ) (Print name) 1 - The asterisked items (*) require further information to be provided to ACB before permanent confidentiality will be extended to these exhibits. Please refer to FCC KDB 726920 and the specific Document link for D01 found at: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731 and review section II, 3) regarding specific information that must accompany these requests. 2 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead.

Declaration of Authorization We Name: Shure Incorporated Address: 5800 West Touhy Avenue, Niles, IL 60714-4608, USA Declare that: Name Representative of agent: Marlin Chen Agent Company name: MRT Technology (Suzhou) Co., Ltd Address: D8 Building, Youxin Industrial Park, No.2 Tian'edang Rd., Wuzhong Economic Development Zone City: Suzhou Country: China is authorized to apply for Certification of the following product(s): Product: Plug-on Wireless Transmitter FCC ID: DD4SLXD3EG57 Model No.: SLXD3+ G57 Sincerely, Signature： Print Name: Juan Castrejon Title: Engineer Associate Staff, GC Company: Shure Incorporated Date: July 8, 2025

Cover Letter Federal Communications Commission Authorization and Evaluation Division FCC ID: DD4SLXD3EG57 Please be notified that we, the undersigned, Shure Incorporated declares that the product which bears the above FCC ID is also compliant with the FCC requirements for SDoC. And the SDoC procedure shall be carried out prior to marketing the device in the US. Sincerely, Signature： Print Name: Juan Castrejon Title: Engineer Associate Staff, GC Company: Shure Incorporated Date: July 8, 2025

Return Loss and Impedance Indicated By Head Tissue Meas. Items Original Value Current Value Deviation Return Loss(dB) -29.1 -27.18 -6.60% Impedance 51.8Ω + 3.09jΩ 47.38Ω + 3.41jΩ -4.42Ω Real part 0.32Ω Imaginary part Test Date: 2025-05-06

MRT Technology (Suzhou) Co., Ltd Report No.: R25S1001068-U401 Phone: +86-512-66308358 Report Version: V02 Web: www.mrt-cert.com Issue Date: 2025-07-22 Template Version:1.0 1 of 49 SAR MEASUREMENT REPORT FCC ID: DD4SLXD3EG57 Applicant: Shure Incorporated Product: Plug-on Wireless Transmitter Regulatory Model Number (RMN): SLXD3+ Product Number: SLXD3+ G57 Trade Mark: , FCC Rule Part(s): FCC 47 CFR Part 2.1093 Result: Complies Received Date: 2025-06-03 Test Date: 2025-06-24 ~ 2025-06-25 Reviewed By: Jame Yuan Approved By: Robin Wu The test results relate only to the samples tested. This equipment has been shown to be capable of compliance with the applicable technical standards as indicated in the measurement report and was tested in accordance with the measurement procedures specified in IEEE1528, KDB 447498 and KDB 865664. Test results reported herein relate only to the item(s) tested. The test report shall not be reproduced except in full without the written approval of MRT Technology (Suzhou) Co., Ltd. Report No.: R25S1001068-U401 2 of 49 Revision History Report No. Version Description Issue Date Note R25S1001068-U401 V01 Initial Report 2025-07-08 Invalid R25S1001068-U401 V02 Update Channel Number Information 2025-07-22 Valid Report No.: R25S1001068-U401 3 of 49 CONTENTS Description Page 1. General Information ............................................................................................................................... 5 1.1. Applicant ...................................................................................................................................... 5 1.2. Manufacturer ................................................................................................................................ 5 1.3. Testing Facility ............................................................................................................................. 5 1.4. Product Information ...................................................................................................................... 6 1.5. Radio Specification under Test .................................................................................................... 6 1.6. Antennas Details .......................................................................................................................... 7 2. Summary of Test Result ........................................................................................................................ 8 2.1. Test Standards ............................................................................................................................. 8 2.2. Environment Condition ................................................................................................................. 8 2.3. RF Exposure Limits ...................................................................................................................... 8 2.4. Test Result Summary .................................................................................................................. 9 3. Specific Absorption Rate (SAR) .......................................................................................................... 10 3.1. Introduction ................................................................................................................................ 10 3.2. Definition .................................................................................................................................... 10 4. DASY6 Measurement System.............................................................................................................. 11 4.1. Introduction ................................................................................................................................ 11 4.2. DASY6 Measurement System Diagram .................................................................................... 11 4.3. System Components Details...................................................................................................... 12 5. The SAR Measurement Procedure ..................................................................................................... 23 5.1. Measurement Process Diagram ................................................................................................ 23 5.2. Test Position Definition .............................................................................................................. 24 5.3. Test Procedure .......................................................................................................................... 27 6. System Verificaiton .............................................................................................................................. 30 6.1. SAR Tissue Check ..................................................................................................................... 30 6.2. SAR System Check ................................................................................................................... 33 7. Analysis and Results ........................................................................................................................... 35 7.1. Antenna Location ....................................................................................................................... 35 7.2. Conducted Power ...................................................................................................................... 35 7.3. SAR Test Results ....................................................................................................................... 36 7.4. Simutaneous Transmission Scenarios Evaluation..................................................................... 38 8. Measuring Instrument .......................................................................................................................... 39 9. Measurement Uncertainty .............................................…

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Shure SLXD3+ Measurements of Shure SLXD3+ with VP89M Microphone For Regulatory Approval BLE (2402 – 2480 MHz) Shure Incorporated February 21 st , 2025 Prepared by Mark Kenkel, Ph.D. Shure SLXD3+ Table of Contents 1.1 SLXD3+ – with VP89M microphone ............................................................................................ 1 Table of Figures Figure 1 – SLXD3+ BLE (2402 MHz) 3D radiation patterns and scale ......................................................... 3 Figure 2 – SLXD3+ BLE (2440 MHz) 3D radiation patterns and scale ......................................................... 4 Figure 3 – SLXD3+ BLE (2480 MHz) 3D radiation patterns and scale ......................................................... 5 Figure 4 - SLXD3+ Dipole Antenna and RF Connection Block Diagram ...................................................... 6 Shure SLXD3+ 1. SLXD3+ – Plug-on Transmitter 1.1 SLXD3+ – with VP89M microphone Antenna 3D patterns for: • Test frequency = 2402 MHz • Maximum gain = 3.1 dBi Figure 1 – SLXD3+ BLE (2402 MHz) 3D radiation patterns and scale Shure SLXD3+ • Test frequency = 2440 MHz • Maximum gain = 3.6dBi Figure 2 – SLXD3+ BLE (2440 MHz) 3D radiation patterns and scale Shure SLXD3+ • Test frequency = 2480 MHz • Maximum gain = 4.1 dBi Figure 3 – SLXD3+ BLE (2480 MHz) 3D radiation patterns and scale Shure SLXD3+ 2. Appendix 2.1 Supporting Test Equipment List • E5071C ENA series Vector Network Analyzer 100kHz-8.5GHz • ets model 2090 multi device controller • ets lindgren model 3164-10 3164-10 Open Boundary Quad-Ridged Horn 400MHz-10GHz • ets lindgren model no 3126-1920 precision sleeve dipole 1728-2112MHz • EMQuest Data Acquisition and Analysis Software v1.12 2.2 Antenna Chamber Diagram and Reference Angles and DUT Pictures Figure 4 – Diagram of Shure antenna chamber. Designed per ETSI EN 300 422-1, section D-1 . Shure SLXD3+ Figure 5 – Photo of Shure Antenna Test Chamber. Figure 6 – Antenna reference Angle SLXD3+ Dipole Antenna Structure Shure SLXD3+ Figure 7 - SLXD3+ Dipole Antenna and RF Connection Block Diagram

MRT Technology (Suzhou) Co., Ltd Report No.: R25S1001068-U201 Phone: +86-512-66308358 Report Version: V02 Web: www.mrt-cert.com Issue Date: 2025-07-22 Template Version:1.8 1 of 63 RF MEASUREMENT REPORT FCC ID: DD4SLXD3EG57 Applicant: Shure Incorporated Product: Plug-on Wireless Transmitter Regulatory Model Number (RMN): SLXD3+ Product Number: SLXD3+ G57 Trade Mark: , FCC Classification: Digital Transmission System (DTS) FCC Rule Part(s): Part 15 Subpart C (Section 15.247) Result: Complies Received Date: 2025-06-03 ~ 2025-06-04 Test Date: 2025-06-16 ~ 2025-06-30 Reviewed By: Jame Yuan Approved By: Robin Wu The test results relate only to the samples tested. This equipment has been shown to be capable of compliance with the applicable technical standards as indicated in the measurement report and was tested in accordance with the measurement procedures specified in ANSI C63.10-2013. Test results reported herein relate only to the item(s) tested. The test report shall not be reproduced except in full without the written approval of MRT Technology (Suzhou) Co., Ltd. Report No.: R25S1001068-U201 2 of 63 Revision History Report No. Version Description Issue Date Note R25S1001068-U201 V01 Initial Report 2025-07-08 Invalid R25S1001068-U201 V02 Update Channel Number Information 2025-07-22 Valid Report No.: R25S1001068-U201 3 of 63 CONTENTS Description Page 1. General Information ................................................................................................................................ 5 1.1. Applicant ...................................................................................................................................... 5 1.2. Manufacturer ................................................................................................................................ 5 1.3. Testing Facility ............................................................................................................................. 5 1.4. Product Information ...................................................................................................................... 6 1.5. Radio Specification under Test .................................................................................................... 6 1.6. Working Frequencies ................................................................................................................... 7 2. Test Configuration ................................................................................................................................... 8 2.1. Test Mode..................................................................................................................................... 8 2.2. Test System Connection Diagram ............................................................................................... 8 2.3. Test Software ............................................................................................................................... 8 2.4. Applied Standards ........................................................................................................................ 9 2.5. Test Environment Condition ......................................................................................................... 9 3. Antenna Requirements ......................................................................................................................... 10 4. Measuring Instrument ........................................................................................................................... 11 5. Decision Rules and Measurement Uncertainty .................................................................................. 12 5.1. Decision Rules ........................................................................................................................... 12 5.2. Measurement Uncertainty .......................................................................................................... 12 6. Test Result .............................................................................................................................................. 13 6.1. Summary .................................................................................................................................... 13 6.2. 6dB Bandwidth Measurement .................................................................................................... 14 6.2.1. Test Limit .................................................................................................................................... 14 6.2.2. Test Procedure ........................................................................................................................... 14 6.2.3. Test Setting ................................................................................................................................ 14 6.2.4. Test Setup .................................................................................................................................. 14 6.2.5. Test Result ................................................................................................................................. 14 6.3. Output Power Measurement ...................................................................................................... 15 6.3.1. Test Limit .................................................................................................................................... 15 6.3.2. Test Procedure ........................................................................................................................... 15 6.3.3. Test Setting ................................................................................................................................ 15 6.3.4. Test Setup .................................................................................................................................. 15 6.3.5. Test Result ......................................…

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