Master: Output volume of the effect.
Overdriver: Sets the amount of gain, from a sweet boost to a nasty crunch.
Dimensions: 4.75" x 4.05" x 2.17" (including hardware).
Weight: 12 oz.
Power: 9V (runs on standard 2.1mm negative center 9V adapter or included 9V battery).
Current Draw: 1 mA.