MIDI or mp3 input, back-ups and audio streaming. Control harmonies with guitar, guitar FX as well as transparent pass-thru, simple preset chaining with step feature, stereo 1/8" input (mp3 player etc), one-button access to global tone, guitar input with auto-mix, USB connection for updates, easy editing of all parameters, 1/4" jack and headphone outputs, expression pedal input. dimensions: 350 x 76 x 216mm. Weight: 2.3kg, mic or line input with digital controlled mic gain, stereo XLR, MIDI in/out/thru, pitch and guitar FX, up to 8 voices with MIDI keyboard control or 4 doubled harmonies, stompbox access to six effects blocks, included power supply