Octave: mode of oscillation (see below)
Shape: pulse width of the waveform. If set too high, may cause octave changes (i.e. when the pulse width exceeds the signal period).
Trim: output level
Modes:
a) gated fuzz (in this mode, Shape controls the gate of the detector)
b) octave down
c) unison
d) octave down + unison
e) octave down + octave up
f) unison + octave up
g) octave down + unison + octave up
Powered by 9v DC adapter, center negative (not included)
Input impedance: 750Kohms