Design Matters

The ZMT3-HM is a lightweight plug-on style transmitter with a built-in antenna. It’s perfect for handheld microphones, ENG applications, and plant microphones.

Please note, this transmitter is NOT intended to be used with a boom pole.

Weighing only 3.1oz (88g), the ZMT3-HM is constructed in a high-strength impact-resistant nylon polymer casing with rounded edges and machined metal that’s cool to the touch.

ZMT4-HMXLR Connector

Microphone Connectivity

A 3-pin XLR connector makes it ideal for most microphones.

Encrypted Audio

The ZMT3-HM transmits using 100% digital modulation resulting in audio that’s fully encrypted. Digital encryption is the only way to keep all audio transmission private. The digital transmission also transmits crystal clear audio of incredible quality.

Internal Recording

Audio can be recorded internally to a microSD card using the highly reliable lossless MARF (Mobile Audio Recording Format) which eliminates file corruption common to recordings due to dead battery or early card removal.


The ZMT3-HM has selectable Phantom power of 12, 24, 32, and 48V. It runs for up to 5 hours on an NP-50 battery depending on what microphone is being used.

Advanced Features

Equipped with ZaxNet™, you can remotely change the frequency, pre-amp gain, output power or place the internal recorder in record, playback, and stop modes.

Modulation Choices for your Environment

The range will always vary depending on your environment, but you’ve got choices to optimize transmission for peak performance. Zaxcom High Density modulation (ZHD) increases the number of available channels from 4 to 9 for every 1 MHz of spectrum space, perfect for reflective environments like busy city streets. XR gives you the maximum distance in less dense / more controlled spaces.


The ZMT3-HM runs up to 5 hours depending on the microphone it’s powering.

MHz Bands

ZMT3-HM is available in the following frequency bands:
“.5 band” (512-608 MHz)
“.6 band” (578-698 MHz) (not available in the U.S.)