It's a cool Dual Channel Distortion/Overdrive Channel 1 goes from clean to hard rock, it's present on the mid range and it's more of an overdrive. Channel 2 Is a distortion, goes from clean to high gain metal. Only one channel can be on at a time. Both channels feature independent level controls and share a tone knob which adds or cuts highs. Also there's the ISF which lets you go from american voicing to british voicing and every place inbetween.
It's an amazing pedal, it has a high quality buffer that really helps the fact that I have an unmoded vox wah in the chain. It is NOT true bypass (duh) It also has two high luminosity LED lights one green for channel 1 and one red for channel 2. Cool pedal, it's where all my dirty tones come from.