1.Multi-functional Design: Automotive circuit tester is a multi-functional driving test pen. It can carry out component activation, continuity test, voltage detection, diode detection and ground detection, and track and locate short circuit problems, and carry out positive and negative pole detection. One tool can meet a variety of test requirements. 2.Flashlight &LCD DisplayFunction: In addition to being a car circuit testing, also has a flashlight function. This means that you can use it for testing at night or in low-light environments, providing convenience and . Equipped with an LCD display screen, it can clearly display test results and related information. 3.Wide Compatibility: Automobile circuit tester is applicable to the detection of all 6-30V vehicle electrical systems. This tester can be used for cars, trucks, SUVs, excavators, boats, etc. to ensure the normal operation of your vehicle's electrical system. 4.Short Circuit Positioning Function: Automobile circuit testing pen has the function of short circuit tracking and positioning. When you encounter a circuit short circuit problem, it can help you quickly locate and provide accurate short circuit locations, saving you time and energy.