1.Multifunctional Automotive Circuit Tester: The electric tester can be widely used for voltage testing, polarity testing, component activation, continuity testing, diode detection, tracking and locating short circuits, and ground fault testing. And equipped with overload protection device, when the current exceeds 8A, the circuit breaker inside the device will automatically trip and emit a buzzer prompt; 2.LCD Digital Display & LED Lighting: The power circuit probe tester is equipped with a high-definition LCD display, which can easily read voltage data. In addition, the front end of the tester is equipped with LED lighting for easy inspection and maintenance in dark places; 3.Dual Color LED Indicator Lights: The probe tester is equipped with LED indicator lights, which can quickly and easily identify the positive and negative poles. When the probe detects positive polarity or performs forward activation, the red LED lights up. Similarly, when negative polarity or reverse activation is detected, the green LED lights up; 4.: The test light is equipped with a 4.5m/14.8ft long lead and two crocodile clips. Can be operated with one hand, compact and portable.