Very nice analog octave fuzz pedal. To my knowledge it is the only one that add a lower octave, when all the others add an upper octave. You can mix Fuzz signal with low octave, playing with the knobs. It is not a pedal you will use every day, as it gives a very particular sound. If you want to have a sample of it, just listen to the solo of Fool in the Rain by Led Zeppelin!