Features: It is flexible and does not deform easily. It is easy to operate with the pen shape. Digital display allows you to see the voltage more clearly. Needle test head can be conveniently connected to the clamp. Designed to detect low-voltage circuit faults in transportation machinery. Indicator design is helpful to detect the positive and negative poles of the battery or circuit. Support short-circuit and open-circuit test, ignition system test,engine performance test, charging system test, automobile battery performance test, circuit polarity discrimination test. It can be used for cars, motorcycles, bulldozers, rollers, excavators and other transport aircraft maintenance operations. Voltage test range: 2.5-32V Material: Plastic + Metal Display: Digital LCD Screen Size: Shown as Picture Cable Length: Max.2.4m Package Included: 1 x Car Electrical Circuit Test Pen