Circuit Breaker Finder Tool: The position of the open conductor can be quickly detected. Plug the tip of the probe into an open wire, send a sonic signal to the wire, and use the wire finder to follow the wire from the tip of the probe to find the location of the breakpoint. Car Battery Tester: ONLY for 12V Vehicles. It offers quick tests for battery voltage, load test and charge status, along with cranking and charging system tests to assess performance and ensure the reliability of your vehicle. Ultra-wide Voltage Range & Short Circuit Located: P180 test probe supports a series of voltage testing, such as -100V-+100V AC and 0-200V DC voltage detection, resistance test and diode test and other vehicle testing. P180 probe tester automotive also supports track and locate the short circuit, help you troubleshoot faulty components accurately and quickly. Component Activation & Fuel Injector Test: Under component activation mode, P180 electrical tester allows to activate different components, such as starter, headlights, blowers, solenoids, cooling fans, fuel pumps, etc. And P180 circuit tester can also test the signal of fuel injector, touch the injector with the probe, the current signal waveform will displayed on the LCD screen. Jump Lead Function & Circuit Breaker Protection: With jump lead function, P180 probe tester can be used to check if there is a fault or problem in the power supply of your vehicle grounding. And P180 electrical circuit tester is built-in circuit breaker protection for the user and vehicle's safety. The working principle of is - the circuit breaker will trip if overload. Equipped with dual LED lights on the top of P180 automotive electrical tester, it can light up the dark working area and help users make diagnoses even in the dark. Color:Red Material:plastic Package Contents: 1 x Circuit Break