Classic compressor / limiter effects pedal, kick with powerful sound on your clean guitar and melt steel when you're playing lead guitar with maximum sustain, smooth out volume peaks and provide endless sustain with ultra-stable dynamics, dedicated sustain time controls , level, and attack for tremendous sound shaping, status LEDs for effect on/off and battery check, world-class electronic on/off switch for greater integrity in bypass mode, runs on 9V battery or with a Behringer PSU-SB DC power adapter (not included), dimensions: 54 x 70 x 123 mm, weight: 0.33 kg.