Powerful 70V amplifier drives up to 250 Watt load Page from any analog telecom port, or a direct microphone Auxiliary and Background Music inputs Individual and Master volume controls Bass and Treble controls LEDs show audio level and activity Programmable input priorities Chose between 3 different chime sounds Provides Loud Ringing / Night Bell Night Transfer switch input 600 Ohm output to drive additional amplifiers Adjustable Automatic Level Control Peak limiter and multiple protection modes