This is a pac swi-rc steering wheel control unit. It is for retaking the factory steering wheel controls when installing an aftermarket radio. This is used in the sense that the wires were splice in before I realized I didn't need it. It is brand new other than that. It will only be missing some of the small resistors that can be purchased from radio shack or other electronic retailers other than the cheap resistors which are about 5 bucks everything else is there including instructions.