[Wide Application], professional automotive circuit tester/circuit test light with 6-24V 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 6-24v DC wirings and circuits. | [Quality LED Bulb], high visibility and strictly tested long service life LED test light bulb to indicate circuits’ signal, the brightness of the light will be different with the different measured voltages. Also including 1 PCS REPLACEMENT LED BULB to make it serve you faithfully for years. | [Bidirectional Current Voltage Testing], you can attach the alligator clamp either to negative or positive ground, while use the probe to touch the other side. | [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. Constructed with high quality acetate fiber body, shatter-proof, more durable than others. Premium PU spring wire, heat insulation and oil resistance for safe use | [Convenient Use], High quality 135 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, will definitely improve your working efficiency.