DBZT20BDigital Hybrid Wireless microphone transmitter

CFR 47 §2.911(d)(5)(i) Attestation Letter Attestation Letter Date: 2026-04-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i) Filing FCC ID: DBZT20B Lectrosonics Inc. “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, Ethan Dayton Director of Product Quality and Experience [email protected] 505-892-4501 Lectrosonics Inc 581 Laser Road Rio Rancho, NM 87124 United States

CFR 47 §2.911 (d)(5)(ii) Attestation Letter Attestation Letter Date: 2026-04-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(ii) Filing FCC ID: DBZT20B Lectrosonics Inc. (“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 and the product does not use Kapersky software information. Sincerely, Ethan Dayton Director of Product Quality and Experience [email protected] 505-892-4501 Lectrosonics Inc 581 Laser Road Rio Rancho, NM 87124 United States

Attestation Letter for Agent 2026-04-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements Part 2.911 (d)(7) Filing FCC ID: DBZT20B Lectrosonics Inc. certifies that, as of the date of the filing of the application, Lectrosonics Inc. is our designated U.S. agent for service of process for the above referenced FCC ID: DBZT20B. Lectrosonics Inc agrees 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. Lectrosonics Inc 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: Company name: Lectrosonics Inc (FRN: 0007067481) Address: 581 Laser Rd NE, PO Box 15900, Rio Rancho, New Mexico 87124, United States Contact person: Ethan Dayton Tel: 505-892-4501 Email: [email protected] Sincerely, Applicant Name Lectrosonics Inc. Applicant Printed Name Ethan Dayton Applicant Signature

QA-FR-170-B 7/29/2014 FCC Authorization 2026-04-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We Lectrosonics Inc. the undersigned, Hereby authorizes Bay Area Compliance Laboratories Corp. to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corp. on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Ethan Dayton Director of Product Quality and Experience [email protected] 505-892-4501 Lectrosonics Inc 581 Laser Road Rio Rancho, NM 87124 United States

QA-FR-172-A FCC Confidential Authorization 4/20/2026 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: DBZT20B In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, Lectrosonics, Inc. hereby requests long-term confidential treatment of information accompanying this application as outlined below: • Block Diagram • Schematics • Operation Description • BOM • Tune-up Procedure As well as short-term confidential treatment of information accompanying this application as outlined below: • Internal Photos • User’s Manual • External Photos • Test Set-up Photos The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Ethan Dayton Director of Product Quality and Experience [email protected] 505-892-4501 581 Laser Road, Rio Rancho, NM 87124, United States

FCC Authorization Letter Date: 2026-03-13 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Agent Authorization To whom it may concern, We Lectrosonics Inc., the undersigned, herby authorize Ethan Dayton, Director of Product Quality and Experience at Lectrosonic Inc. to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Ethan Dayton on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely, Robert Cunnings V.P. IT, Logistics and Quality Assurance [email protected] 505-892-6243 Lectrosonics Inc 581 Laser Road Rio Rancho, NM 87124 United States

Label Variations LABEL POSITION: Top Panel, as shown IFBT20 Regulatory Labeling Label (silver metallic) - to be printed by Maxine and aixed at Final Assembly. Part number of the label is 23254; “LABEL PROD/SN/APPVL IFBT20 FAMILY” IFBT20 - B1

Lectrosonics, Inc. FCC ID: DBZT20B Report Number: R2604022-74 Page 14 of 63 FCC Part 74H Test Report 4 FCC §2.1091 - RF Exposure 4.1 Applicable Standards According to FCC §2.1091, 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. Limits for General Population/Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Averaging Time (minutes) Limits for General Population/Uncontrolled Exposure 0.3-1.34 614 1.63 * (100) 30 1.34-30 824/f 2.19/f * (180/f 2 ) 30 30-300 27.5 0.073 0.2 30 300-1500 / / f/1500 30 1500-100,000 / / 1.0 30 Where: f = frequency in MHz * = Plane-wave equivalent power density Lectrosonics, Inc. FCC ID: DBZT20B Report Number: R2604022-74 Page 15 of 63 FCC Part 74H Test Report 4.2 MPE Prediction Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01 S = PG/4R² Where: S = power density P = power input to antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna Lectrosonics, Inc. FCC ID: DBZT20B Report Number: R2604022-74 Page 16 of 63 FCC Part 74H Test Report 4.3 RF exposure evaluation for FCC Antenna A Worst Case Maximum output power at antenna input terminal (dBm): 22.94 Maximum output power at antenna input terminal (mW): 196.79 Prediction distance (cm): 20 Prediction frequency (MHz): 537.6 Maximum Directional Antenna Gain, typical (dBi): 2.15 Maximum Antenna Gain (numeric): 1.64 Power density of prediction frequency at 20.0 cm (mW/cm 2 ): 0.064 FCC MPE limit for uncontrolled exposure at prediction frequency (mW/cm 2 ): 0.358 The device is compliant with the requirement FCC MPE limit for uncontrolled exposure. The maximum power density at the distance of 20cm is 0.064 mW/cm 2 . Limit is 0.358 mW/cm 2 . Antenna B Worst Case Maximum output power at antenna input terminal (dBm): 22.73 Maximum output power at antenna input terminal (mW): 187.50 Prediction distance (cm): 20 Prediction frequency (MHz): 537.6 Maximum Directional Antenna Gain, typical (dBi): 2.15 Maximum Antenna Gain (numeric): 1.64 Power density of prediction frequency at 20.0 cm (mW/cm 2 ): 0.061 FCC MPE limit for uncontrolled exposure at prediction frequency (mW/cm 2 ): 0.358 The device is compliant with the requirement FCC MPE limit for uncontrolled exposure. The maximum power density at the distance of 20cm is 0.061 mW/cm 2 . Limit is 0.358 mW/cm 2 . Antennas cannot transmit simultaneously

-15 30 60 90 o 120 150 180 210 240 270 o 300 330 o dB DIPOLE HORIZONTAL PATTERN

-15 60 120 150 180 o 210 240 300 330 30 oo o o DIPOLE VERTICAL PATTERN dB o o

IFBT20 Antennas Antenna model/Part number: A500RA19, A500RA22, A500RA25, SNA600A Antenna Manufacturer: Lectrosonics, Inc. Connector Type: BNC Maximum Gain: 2.15 dBi Antenna Type/Pattern: dipole in free space Antenna Pattern: See documents “DipoleHorizontalPattern.pdf” and “DipoleVerticalPattern.pdf” both attached.

Note: This test report is prepared for the customer shown above and for the device described herein. It may not be duplicated or used in part without prior written consent from Bay Area Compliance Laboratories Corp. This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA*, NIST, or any agency of the Federal Government. * This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “*” (Rev.2) FCC PART 74, SUBPART H TEST AND MEASUREMENT REPORT For Lectrosonics, Inc. 581 Laser Road NE, Rio Rancho, NM 87124, USA FCC ID: DBZT20B R e p o r t T y p e : O r i g i n a l R e p o r t P r o d u c t T y p e: D i g i t a l H y b r i d W i r e l e s s M i c r o p h o n e T r a n s m i t t e r Prepared By: Libass Thiaw Test Engineer Report Number: R2604022-74 Report Issue Date: 2026-05-29 Reviewed By: Christian McCaig RF Lead Engineer Bay Area Compliance Laboratories Corp. 1274 Anvilwood Avenue, Sunnyvale, CA 94089, USA Tel: 1 (408) 732-9162 Fax: 1 (408) 732-9164 Lectrosonics, Inc. FCC ID: DBZT20B Report Number: R2604022-74 Page 2 of 63 FCC Part 74H Test Report TABLE OF CONTENTS 1 GENERAL DESCRIPTION ................................................................................................................................. 5 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) .......................................................................... 5 1.2 MECHANICAL DESCRIPTION OF EUT ................................................................................................................. 5 1.3 OBJECTIVE ......................................................................................................................................................... 5 1.4 RELATED SUBMITTAL(S)/GRANT(S) ................................................................................................................... 5 1.5 TEST METHODOLOGY ........................................................................................................................................ 5 1.6 MEASUREMENT UNCERTAINTY .......................................................................................................................... 6 1.7 TEST FACILITY REGISTRATIONS ........................................................................................................................ 6 1.8 TEST FACILITY ACCREDITATIONS ...................................................................................................................... 6 2 EUT TEST CONFIGURATION ......................................................................................................................... 11 2.1 JUSTIFICATION ................................................................................................................................................. 11 2.2 EUT EXERCISE SOFTWARE .............................................................................................................................. 11 2.3 SPECIAL EQUIPMENT ....................................................................................................................................... 11 2.4 EQUIPMENT MODIFICATIONS ........................................................................................................................... 11 2.5 LOCAL SUPPORT EQUIPMENT........................................................................................................................... 11 2.6 REMOTE SUPPORT EQUIPMENT ........................................................................................................................ 11 2.7 POWER SUPPLY AND LINE FILTERS .................................................................................................................. 11 2.8 INTERFACE PORTS AND CABLES ...................................................................................................................... 12 3 SUMMARY OF TEST RESULTS ...................................................................................................................... 13 4 FCC §2.1091 - RF EXPOSURE .......................................................................................................................... 14 4.1 APPLICABLE STANDARDS ................................................................................................................................ 14 4.2 MPE PREDICTION ............................................................................................................................................ 15 4.3 RF EXPOSURE EVALUATION FOR FCC .............................................................................................................. 16 5 FCC §74.861(E)(1)(II) - RF OUTPUT POWER ................................................................................................ 17 5.1 APPLICABLE STANDARDS ................................................................................................................................ 17 5.2 TEST PROCEDURE ............................................................................................................................................ 18 5.3 TEST SETUP BLOCK DIAGRAM ......................................................................................................................... 18 5.4 TEST EQUIPMENT LIST AND DETAILS .............................................................................................................. 18 5.5 TEST ENVIRONMENTAL CONDITIONS ............................................................................................................... 18 5.6 TEST RESULTS ................................................................................................................................................. 19 6 FCC §74.861(E)(5,6,7)(I) - OCCUPIED BANDWIDTH & EMISSION MASK ............................................. 20 6.1 APPLICABLE STANDARDS ...............................................…

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