Wide Application Professional automotive circuit tester/circuit test light with 2.6-32V 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 2.6-32v 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 w