Boss JS-10 JS-10 eBand, guitar and bass preamp, 2.1-chanel sound system with subwoofer, 2x jack inputs for guitar,  bass and microphon, controls for input signal, master volume control, recording function, 1x Aux-in, headphone out, line out, connection for expression pedal, USB, DSP Chip with effects and amps form the Boss GT-100, 350 built-in audioloops (50 new songs), tempo/key-shift function