Classic Rat distortion but different. The thing sounds like the music based on 80s murder movies. Totally killer! Think Michael Myers with a Flying V! Think Jason and Freddy in a punk band! Think leatherface with his balls out! When the killer cuts the lights don't worry this Glows in the Dark.
The cut switch selects between silicon, led, and opamp clipping. The slash control changes the frequency response of the distortion, ranging from less, normal, or out of control.