This is the Trem-endous Gain - Overdrive/Tremolo pedal. Two in One goodness!
The overdrive can go from a nice, transparent drive, all out gain goodness. With three clipping options (Symmetrical, Asymmetrical, and no clipping) you will not get bored too easily.
The Tremolo is quite simple. A depth and Speed knob, plus a switch to change from Square wave to sine wave.
Internally, there are two trim pots for more added versatility. One controls the overall volume of the tremolo circuit and the other controls the amount of bass in the overdrive circuit.
Artwork on this pedal was completed by Pascal D'Bras. Check out his work here: