Introducing the Edward Tools Pro Auto Circuit Tester Probe - your ultimate solution for automotive electrical circuit testing. With its versatile functionality and durable design, this professional-grade tester ensures quick and accurate diagnostics for vehicles of all kinds. Featuring a wide voltage testing range of 6-24V DC, this tester is perfect for checking various electrical circuits in automobiles, including headlights, taillights, turn signals, and more. Whether you're troubleshooting faulty sockets or fuse connections, this tool has you covered. Equipped with a quality LED bulb, this tester provides high visibility and long service life, making circuit signals easy to detect. Plus, with a spare replacement LED bulb included, you can rely on this tool for years to come. Thanks to its bidirectional current voltage testing capability, you can easily attach the alligator clamp to either negative or positive ground, while using the sharp stainless steel probe to make contact with the other side. The insulation protective rubber tip ensures safety from electric shock, while the high-quality acetate fiber body guarantees durability and shatter-proof performance. Experience convenience like never before with the 140-inch extendable spring probe wire, offering flexibility and durability beyond ordinary cable wires. The large size alligator clip allows for easy one-handed operation, improving your overall efficiency in automotive diagnostics. Trust the Edward Tools Pro Auto Circuit Tester Probe to streamline your testing process and keep your vehicles running smoothly.