CLARITY: 40 WATT MIXER AMP Professional Power Mixer Amplifiers are rugged, long lasting and American Made. Features: Four balanced microphone or three auxiliary inputs Telephone system audio page port input Multi-level priority switching Voice controlled switching on all inputs Mix all inputs or priority input option Three levels of protection: thermal, active current limiting, and circuit breaker Bass, treble and master gain controls ON/OFF switch Effects loop with link switch Tape output Booster output Power "ON" indicator Clipping indicator Rack mountable with optional mounting kit (SMA-RMK)