This is a brand new pigtail wiring harness, great for adding a second vehicle for your brake control. This wiring harness comes with a straight 4-connector plug that fits into the back of various brake controls, and the other end has four wires that would be spliced into your vehicle towing system. This plug will definitely work with Tekonsha P3, Prodigy P3, and Primus IQ models, as well as with the Valley Phantom Controller. This item is brand new, in stock and ready to ship.