This venerable NanoVerb effects processor includes the original weird Alesis 9-volt AC power supply! The unit's tested and working, all the effects work. The knobs could use a spritz with some contact cleaner, they get a little crunchy occasionally, but it's not bad. You get a bunch of effects to pick from and dial in: multiple kinds of chorus, delay, flange, non-linear, plates, rooms, halls, and a wacky rotary effect. Some various scrapes on the outside from past use.