The Innovative Products of America Smart MUTT X, No. 4105, is a universal, remote-controlled, diagnostic light trailer for all North American trailers. The unit is ideal for semi, RV, utility, boat, and horse trailer-type connections. It's able to test five of the most common trailer types, including 7-way flat (spade), 7-way round, 6-way round, and 5 pin and 4 pin connections. The Smart MUTT X is microprocessor controlled and can be electronically switched to different trailer-type modes. Each mode optimizes system programming by pin type to simplify and speed up inspections. It includes a large processor for future expandability and a 12-button remote.