The Innovative Products of America Smart MUTT X, No. 4105, is a universal, remote-controlled, diagnostic light trailer for all North American trailers. Designed to be used on five trailer connection types (7-way flat (spade), 7-way round, 6-way round, 5 pin and 4 pin connections), the Smart MUTT X tests lights and electric brakes on commercial and light duty trailers. It is built to facilitate a one-man testing operation, 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.