Features: This circuit probe :Electrical Tester for reducing diagnostic time in automotive electrical systems. Works on all 6-24V, including car, boats, trailers, relays, and more, can test for continuity, test for polarity, test for bad ground contacts, check switches, relays and the on-off of diodes, fuses and circuits, track and locate short circuits. Needle test tip can be conveniently connected to the clamp. Support short-circuit and open-circuit test, ignition system test,engine test, charging system test, automobile battery test, circuit polarity discrimination test. A good helper for both professional mechanics and home-use customers Package Includes: 1x Car Circuit Tester Specifications: Material:ABS Voltage test range: 6-24V Cable Length:Approx.100cm/39.37'' note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.