This is an overdrive pedal with a wide range from low to high gain. The central distortion–producing parts use transistors rather than diodes, aiming for a tube–like overdrive that makes the most of moderate compression and the guitar's own original characteristics. The pedal has a FAT control to adjust the amount of distortion and bass, a treble control to let loose the high frequencies and create a crisp tone, and a presence cut switch to fine–tune the high–frequency overtones produced in deep distortion.