Line 6 M13 Stompbox, 75 pedal effects (delay, modulation, overdrive/distortion, filters, compressor, reverb), direct controls for easy-to-use operation, 28-second looper (play, stop, half-speed, reverse, undo), programmable presets or scenes, built-in chromatic tuner, tap-tempo control, MIDI in/out, stereo in/out, effects loop, output for 2 optional expression pedals, includes PX2 power supply.