This is a clone of the Earth Quaker Devices Life. Which is a great octave fuzz.
The foot switches left to right are: Boost, Octave, Bypass,
The knobs left to right: Boost, Distortion, Filter, Volume, Octave. The center top knob is a four position switch that chooses the clipping type.
The circuit uses an octave similar to the Green Ringer info a ProCo Rat like distortion circuit built around a single op-amp followed by clipping diodes to ground. The center top knob chooses one of four clipping diode arrangements.