The Power Probe Electrical Circuit Tester is a highly advanced diagnostic tool designed for automotive use. It can provide power or a ground at the test point of any automotive circuit to help users easily identify electrical issues in both passenger vehicles and heavy-duty/commercial vehicles. The unit is compact and easy to use, making it a valuable addition to any mechanic's toolbox. Can be connected to battery with full car length lead or plugged in to cigarette lighter. With its precise measurements and intuitive design, the Power Probe Electrical Circuit Tester ensures accurate results for efficient and effective maintenance and repair.