Super sweet "amp in a box" od pedal based on the Marshall Bluesbreaker amp. According to the Mr Black literature this is an original circuit and not a clone of the Bluesbreaker pedal. I've never played a Bluesbreaker pedal so I can't comment on how they compare. Limited edition for black Friday, no longer made. Anyway, this thing sounds hella good but I don't need it in my current projects. I only used it for recording so it is in pristine condition.