This professional automotive circuit tester/circuit test light with 3-72V DC voltage testing range, perfect for checking various vehicles electrical circuits, quickly check automotive headlights, taillights, turn signal circuits, faulty sockets, fuse connections, also for testing other 3-72v DC wirings and circuits.Digital LED voltage display for accurate volt readouts, .1 v resolution ratio with 0.3v accuracy. Compared with LCD, clear&visible LED reading display for day and night. LED circuits board with Mini current than traditional test lights, more secure and burn-resistant to automotive computer board.You can attach the alligator clamp either to negative or positive ground, there is also a light emitting diode on the circuit board for polarity indication, red light indicates positive polarity and green light indicates negative polarity.Sharp stainless steel probe for piercing wires, also for hard to reach tight areas. Insulation protective rubber tip protects you against electric shock. Heavy duty test light body constructed with high quality ABS, shatter-proof, more durable than normal test lights.High quality 96 inch long enough PU spring wire offers more flexibility, lighter and more durable than normal cable wires, convenient for use and storage, along with large size alligator clip for easy one hand operation.Colour:blackMaterial:ABSPackage Contents:1 x Circuit TestersOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.