All transmitters operate using two AA batteries and feature high- and low-level RF output settings. The low-level setting extends battery life while retaining a strong RF signal link. Charging terminals on the base of each transmitter work with the optional ATW-CHG3 and ATW-CHG3N charging docks to recharge AA NiMH batteries. Each transmitter's OLED screen presents a great deal of setup and operating information, including battery indicator, mute status and operating frequency. Setup functions are menu-driven via soft-touch controls, which are covered to prevent accidental activation.

A dual-color status LED illuminates green when power is on and red when the transmitter is muted or battery power is low. Transmitters have a selectable high-pass filter and a gain setting that can be adjusted in 2dB increments. As with the receiver, transmitter settings can be locked. The ATW-T3201 body-pack transmitter features a tactile mute toggle switch (defeatable) for physical confirmation of the mute status when the transmitter display is not visible.

It also has a multifunction button that can be programmed to perform one of two functions when pressed and held: turn off RF transmission or switch to a preselected backup frequency to avoid interference. (The multifunction button can also be disabled.) An input is available on the transmitter for low impedance microphone and high-impedance musical instrument or line input. The transmitter supplies 5V DC bias to power condenser microphones. The rugged cH-style screw-down 4-pin input connector provides secure connection to cH-style lavalier mics, headworn mics and cables. The durable metal body-pack transmitter features a field replaceable whip antenna, OLED screen and