Di Box, Balanced 3 Channel Mixer : Microphone/instrument (Balanced Line), Stereo Music (2x Rca Input), Mono Output Full metal case Runs for days on a 9v battery (battery clip provided), or use wall AC/DC adapter (9 to 20v, 2.1 mm positive tip) 1 microphone input (can amplify instruments as well - balanced line) stereo RCA input - play from your iphone, android, table, computer, cd player, etc. Mono RCA output Mono output