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