This is a fuzz pedal for bass guitars, now difficult to obtain, made by Mobidic, a guitar tech company. Pedals from this brand are used by artists such as Mr. Kariyasu of Sakanaction and Mr. Toshiya of DIR EN GREY. The thickness and sound pressure of the low end are incredible. When using fuzz on a bass, the sound tends to become thin, but with this pedal, there's no need to worry about that. You can also blend in the original sound, so the contours are well-preserved. Operation has been confirmed. This is a sale of the pedal unit only.