The Light Ranger Mobile Universal Trailer Tester (MUTT) is designed for utility and RV-type trailers. The light and electric brake tester is water-resistant and portable, which allows it to test a trailer without the tow vehicle. It also features a rugged, American-made enclosure with a strong carrying handle and an external power accessory port and internal battery compartment. The Light Ranger MUTT is designed to simulate all electrical circuits while providing industry standard pin configuration and short circuit protection. According to Innovative Articles of America Inc. (IPA), the unit is compatible with 7 spade, 6 round and 4/5 flat pin connection types.