One of the first multi-effects units sold. On the advice of the late great Michael Caswell (see YouTube link) I learned that these early units were simply collections of the same circuits Boss used in their stand-alone pedals, all housed in one case. As he said, best used as a modulation effects unit in your amp's effects loop - the distortions are, umm, well, maybe not the best. But chorus, delay, reverbs, all awesome. Has been in AC storage, never gigged. Scuffs and surface scratches consistent with a unit that's some 25 years old. All switches, buttons, LEDs and jacks work without issue. Comes with the original power supply.