Mad Professor Simble Mk2 Overdrive PedalThis is a Brand New Mad Professor Simble Mk2 Overdrive Pedal. It is a Transparent and Organic sounding Overdrive. It always retains the core tone of your guitar. It works as a Clean Boost"on the edge" Crunch or a Sweet Singing Overdrive. The Mk2 is an Improved Version of the original Simble. The Improvements give it a More Open sound More Headroom. The Contour gives you an extended High End from the V1.