This is a custom version of a high-quality booster that preserves the original sound. It has been modified to emphasize the midrange more than the regular version, resulting in a thicker sound. This is a limited edition produced in limited quantities, so it's not often seen. There are no noticeable scratches, and it's in almost perfect condition, with confirmed functionality. The included accessories are all shown in the images. The following is the manufacturer's description: The Custom Pedal Series is a limited production series based on Mad Professor's standard factory models, modified in Finland by the builders who create the hand-wired models. The original Ruby Red Booster is a multi-functional booster that combines a master volume, two types of boosters, and a buffer (switchable to true bypass). The original version only boosted the treble, but this MOD also has the effect of boosting the upper midrange. This adds thickness to the midrange while still producing the same shimmering treble components as the original, resulting in an exquisite lead tone. This is especially ideal for boosting during solo playing.