The Super Duper 2-IN-1™ has two of our infamous Super Hard On™s in one small box, plus a Master volume control that lets you use it as an overdrive/distortion with any input volume. The two channels can give any amount of gain, from a soft bluesy boost in two stages, to a crunchy rock level, to a wild sustaining beast.

https://www.zvex.com/guitar-pedals/super-duper-2-in-1-guitar-effects-pedal