Automotive Relay Tester Pen Voltage 3-120V DC Electric with LED Digital Indicator Retractable Spring Wire Battery for Car, Truck, etc.

Bidirectional Voltage Measurement: The alligator clip can be easily connected to either negative or positive ground, with an LED polarity indicator (red light indicates positive "+" and green light indicates negative "-"). Package Contents: You will receive an automotive circuit tester. It features a 20cm body and a retractable spring-loaded lead (extending from 60cm to 1.8m), operating at 3-120V DC for diagnosing vehicle circuits. Easy to Use: Designed with a long extendable cable and probe, which can easily reach hard-to-diagnose areas. Equipped with a precise, sharp probe that can easily pierce wires. Wide Range of Applications: Suitable for checking the circuits of various vehicles, quickly checking headlights, taillights, turn signal circuits, faulty sockets, connections, fuses, broken wires, etc. Product Material: The tester handle is made of plastic, resistant to electricity and heat. The circuit tester probe is made of metal, which greatly improves its durability. Specifications: