This is the HTJ-WORKS BBD-1, a Japanese-made effector. Its official name is Bottom Boost Driver, and it adds richness and thickness to your sound without compromising the original tone of your amplifier. The concept is: if you could only add one pedal directly to your amp, this would be it. Using it as a booster for lead or backing, the contours of your amp sound become clearer, resulting in a very pleasing tone for both the player and the listener. When used with a clean amp, it's also possible to create a crisp, light, and pleasant cutting sound. It's recommended for those who want to boost their amp's tone without sacrificing it, as well as those who aren't satisfied with studio amps or who have repeatedly changed amps. - Included: Box, warranty Only used indoors, but there are some minor scratches on the back.