EarthQuaker White Light Overdrive w/Power Supply and Patch Cables Includes Power Supply and Patch Cables! 4.37" X 2.37" X 1.5" with knobs Power: 9v Battery or any standard 9 volt DC power supply with a negative center 2.1mm barrel. Controls - Gain: Controls the amount of distortion Weight: A multi-functional control, allows the level of saturation, bass response and the over all feel of the device to be altered. Level: Controls the output Compression Switch: Less= Open w/ more high-mids and bite. More= Crunchy and compressed with a bit less bite and more flat mids. Includes a Lifetime Warranty!