Three Balanced Microphone or Auxiliary InputsTelephone Audio Page Port InputMulti-level priority switchingVoice Controlled Switching on all InputsScrewdriver Adjustable Volume ControlsBass and Treble ControlsTwo Built-In Tone Generators ( single and warble tone)Mix all Inputs or Priority Input Option SwitchPower "ON" IndicatorClipping IndicatorTriple Level Output Protection: Thermal, Active Current Limiting, Circuit BreakerScrew Terminals Provided for all ConnectionsEasy, Convenient Wall Mounting