Throttle Box

Mesa/Boogie Throttle Box Distortion Pedal

Distortion Pedal with True Bypass Switching, Low-/High-gain Switch, Tone Control, Mid-Cut Control, Internal EQ/Boost Switch, and up to 20dB of Boost

http://www.mesaboogie.com/pedals--related/electric-guitar-pedals/drive-pedals/throttle-box.html