“Really cool distortion pedal with built in chorus. Long out of production (1987-1992) featuring three doubling modes, two chorus modes and stereo output as well as a single channel mode. The doubling mode works by adding a slight delay to the signal from output B giving a stereo effect when both channels are used — simple but very effective. There really is nothing quite like it available today — truly unique but very usable effect.”
More information on this effect can be found here.