Behringer UZ400 Classic Fuzz Distortion Effects Recreate the classic and burning fuzz tone of the '60s and '70s Dedicated Fuzz, Tone and Level controls for awesome sound shaping Blue status LED for effect on/off and battery check First-class electronic On/Off switch for highest signal integrity in bypass mode Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included)