Guitar distortion effect pedal. The RETRO distortion is based on the ENGL Retro Tube amp series and delivers a classical vintage sound. It has controls for pedal switch, bright switch, low-cut, bass, treble, distortion and master volume. It has 6,3 mm jack input and output. Power: 9V AC adaptor (not included) or 9V battery. Dimension: 59 x 110 x 34 mm. Weight: 310 g