The Power Probe ECT2000 Smart Circuit Tracer assists with quickly and easily locating short and open circuits. The set comes with seven adapters, a transmitter with a 20' cable to reach throughout the vehicle and a receiver that points users in the direction of the short circuit, eliminating the guess work. The kit comes with a transmitter and receiver, as well as bulb adapters, a back probe, blade probe, piercing probe, alligator clip adapter, universal with 4mm plug and two AAA batteries. An LED indicates the direction to the short circuit and a toggle tone indicates the circuits change of state.