In addition to 2 controllers of gain and treble, this device is equipped with a dark switch that switches between characters, and is a preamp/boost pedal designed to gain up the amplifier. High gain amplifier can be connected to the front level of the amplifier for further gain up; Clean amplifiers are also effective as a preamp and clean booster. It has excellent response to high and low picking, and the model name is Overdrive, but the pedal itself is designed to not warp.