1.[LED DIGITAL DISPLAY, ACCURATE READING]The Power Circuit Probe Kit designed with LED digital voltage display for accurate volt readouts. Bidirectional current voltage testing mode, you can attach the alligator clamp either to negative or positive ground, red light indicates positive polarity and green light indicates negative polarity. Compared with LCD, LED lights are not affected by light brightness, and can be read accurately in daytime or dark areas. 2.[COMPUTER SAFE]Equipped with insulation protective cover,which can better grip the body and screws, insulation protection against electric shock. Circuit board with line protection function, r and more burn-resistant. 3.[FLEXIBLE TO USE & CARRY]Extra long 96' PU spring wire increases flexibility, range, and dom when testing. A sharp stainless steel probe with protective rubber tip can reach into tight places and pierce insulation. Compared to cable wires, coil spring wires are lighter and easier to carry. This does not need to take up too much space in your toolbox or any storage area, it is convenient to use anytime, anywhere. 4.[WIDELY USE]This Professional automotive heavy duty circuit test light designed to test 2.6-32V DC voltage. Can be used to detect power, ground and find shorts and breaks in wires. Quickly check automotive headlights, taillights, turn signal circuits, faulty sockets, connections, fuses, broken wires and more.