For locating electrical short and open circuits. • Includes 18-9906 & 18-9907. • Operates on 6 to 42 VDC systems. • 8 in. flexible probe reaches in congested places. • Adjustable sensitivity. • Transmitter and receiver LEDs signal open or short circuit conditions. • Auto polarity transmitter that leads with 5 amp alligator clips. • Includes hard shell carrying case.