- Heavy-duty test light with a body built from PC and rubber for superior durability and shatter resistance compared to ordinary test lights. - Insulation protective rubber tip guards against electric shock, making it safe to probe wires and work in tight, hard-to-reach areas. - Ideal for automotive electrical work: quickly check various vehicle circuits, including headlights, taillights, turn signals, and faulty sockets. - Professional automotive circuit tester with a practical 6-24V testing range for reliable performance across vehicle systems. Use scenarios - During aftermarket lighting installation, test voltage at connectors in tight spaces behind the bumper or inside the engine bay. - Diagnose a non-working taillight by verifying the socket and wiring harness without removing components. - Verify turn signal circuits or other electrical paths in cars, trucks, or motorcycles to confirm circuit integrity.