Upgraded 3-72V Led Digital Automotive Circuit Tester, Dc Voltage Test Light With [Wide Application Than Others] This professional automotive circuit tester/circuit test light with 3-72V DC voltage testing range, ideal 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. [Computer Safe Accurate LED Digital Reading] 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 micro current than traditional test lights, more secure and burn-resistant to automotive computer board. [Bidirectional Voltage Testing] 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. [Quality Made] 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. [Convenient Use] 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.