Microphone Input - 3-level Mic input with mixer function Amplify Your Sound - Outputs 40Watts at either 70V or 100V Compact - Small form factor ideal where full-sized amplifiers will not fit Multiple Control Options - Take control using RS232, IR, or push buttons Durable - Metal enclosure designed to last for years Bass, Treble, & Volume - Control bass, treble and volume levels conveniently using integrated push buttons