The ATW-T3201 3000 Series (fourth generation) body-pack transmitter features a unique multifunction button can be used to switch to a backup frequency (on both transmitter and receiver) should interference be encountered. Rugged cH-style connector provides secure connection to lavalier mics, headworn mics, and cables with cH-style screw-down 4-pin connector. Tactile mute toggle switch (defeatable) for physical confirmation of mute status when transmitter display is not visible. Charging terminals work with optional ATW-CHG3 and ATW-CHG3N smart charging docks to recharge NiMH batteries. OLED screens for optimal readout of key settings and alerts.