The Vevor automotive circuit tester kit is designed to help diagnose vehicle electrical system issues quickly and accurately. It features a TFT color display, built-in lighting, and a 2-in-1 design with cable tracing capability for locating open or short circuits. The tester supports multiple testing functions including voltage, resistance, diode, continuity, frequency, and component activation. With a 30-piece probe kit and two 19.7' cables, it is built for versatile use on cars, pickups, motorcycles, SUVs, boats, and more.