The AUT600 is an automotive testing and troubleshooting kit. This fleet test kit is ideal for trucks, buses and RV's with AC auxiliary power systems. The AUT600 includes the Extech EX505, DC400 and 42510. UL listed and CAT IV 600V safety rating. This product is complete with test leads, Type K bead wire probe, Type K to banana input adapter, batteries and hard carrying case.