Update Multi-function Automotive Circuit Tester - The power circuit probe tester kit functions such as Voltage&Polarity Test,Continuity Test,Signal Circuit Test,Components Activate,Check Bad Grounding,Locate Short Circuits,Circuit Breaker Protection, etc. It can recision testing.making it an indispensable tool for any car owner or professional mechanic. LCD display & Flashlight Design - The circuit tester kit is equipped with an LCD display that allows the user to easily test voltages in the range of 6 V to 24 V and display the values on the screen. And the built-in flashlight can be used by simply clamping the red and black clips onto the electrodes on the positive and negative terminals of the car battery respectively, which is convenient for testing and repairing in a dark place, and ca.