Features: Lightweight, pointed design, compact structure, easy to carry. Handle is made of ABS plastic and the hardened & tempered carbon steel probe is chrome plated. The sharp steel probe easily pierces wire insulation to check circuitry. DC test: 6V to 24V, can be used to test the resistance, looking for short-circuit wires, test the power outlet. Rugged, fast, battery-less operation, convenient and economical. Designed for the detection of low-voltage circuit transport machinery failure designed to be used in vehicles, motorcycles, bulldozers, rollers and other transport machinery maintenance operations. Package Includes: 1x Test Pen Specifications: Material:ABS Engineering Plastics Style: red leather handle/black leather handle/digital display Cable Length: about 103cm Suitable for auto mechanical maintenance, breakpoint test, induction test, voltage test Test the short circuit and open circuit of the car circuit. Circuit discrimination test Car battery performance test Charging system performance test Ignition system performance test Engine performance test is suitable for 12V/DC. automotive electronic control system note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.