Info from the manufacturer about their original:
SNOWJOB, a dual mode underdrive, what the hell is an underdrive you ask, hold on, we will explain. An underdrive is similar in function to an overdrive, except instead of driving the amp it drives from the guitar, adding harmonic content to fill the space between the notes. The SNOWJOB is a dual mode underdrive, with the toggle to the left (white snow mode) the pedal is extremely transparent, almost acting like a boost, but full and rich with headroom to spare. With the toggle to the right (yellow snow mode) the pedal is a bit more aggressive, adding musical harmonic clipping to the spaces between the notes, like a tube amp on the brink of destruction, right in that sweet spot.