The Audio Technica 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 lowimpedance 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 a secure, locking battery compartment door.