I am cleaning out a container to move it , and will have lots of stuff going on Craig's list. This is a phase converter ( also known as a variable frequency drive)used to convert 220 to 3 phase . When wired correctly these not only convert the single phase to 3 phase but also allow you to control the speed of the motor you are powering. See the tag for specs . I have 2 and I'll make a deal if you buy both. They are identical.