General description The DC 6V 12V 24V Automotive Circuit Tester Pen is designed for effective detection of low-voltage transmission faults in various vehicles, including cars, trucks, motorcycles, and boats. It features a red and green LED bulb indicator light for easy reading of test results. Technical specifications Material: Brass Normal wire length: 60 cm (can stretch up to 2 m) Pen size: 110 mm Test range: 6-24 V