Circuit tester kit for 6V-30V vehicles with TFT color display1、Professional Functions: With a variety of functions, such as, testing for continuity, diagnosing circuit failures, checking the good and bad ground, activating components on and off the vehicle, capturing minimum maximum voltage, etc. 2、4 Adjustable Mode Circuit Tester: Four modes are available for diagnosing electrical systems, just press the mode button and cycle between each mode, DC voltage, AC voltage, resistance and diode. 3、Safety Design: Automatic circuit breakers protect the tool from overloads with internal circuit breakers. In addition, the rugged blow molded case can protect these parts to avoid damage and facilitate transportation. 4、Easy to Use: Built in LED flashlight allows you to work in dark areas, beep when testing, and operate the tool without checking the menu once you are familiar with the tone. 5、Wide Applications: The power circuit tester probe kit can support 6‑30V vehicles, such as cars, boats, trailers, ATVs, RVs and many others. 33ft cable allows easy access to test along the vehicle.