#9005A - The Super MUTT® HEAD is a portable, remote controlled diagnostic Trailer Tester for inspecting lighting, ABS and air brake systems on commercial type trailers. Specially designed for service trucks and offsite inspections, the Super MUTT® head is powered by an (optional) internal 12v battery, or external power source such as a service truck battery, using the supplied external connector and requires shop air for air brake application. The Super MUTT® head features the same industry leading diagnostic program as the Super MUTT® Deluxe and Smart MUTT® which instantly identifies crossed, open, shorted circuits, bad grounds, and overloads.