The Access Tools Ultra Probe 3 multi-tester probe tool is designed for a variety of automotive electrical diagnostic tests. The tool enables the user to power electrical components, perform voltage and ground detection tests, test relays and components, check continuity, as well as identify short circuits. The Ultra Probe 3 features a built-in volt meter, an audio indicator tone, an LED flashlight, extra-long jumper cables that reach the rear of the vehicle with ease and a heavy duty carrying case.