CNBJ-823 Car Electrical Circuit Tester, Multifunctional Drive Test Pen(Red)

1. Digital Voltage Display And Polarity Identification: Clear LCD screen directly displays real-time DC voltage values while status LEDs automatically identify positive (red light) and negative (green light) polarities.
2. Automatic Overload Protection: Built-in circuit breaker automatically trips and sounds a buzzer alarm when current exceeds 8A, effectively protecting the device and vehicle electronics.
3. Built-In LED Work Light: Equipped with a bright front LED flashlight to easily illuminate dark engine bays and under-dash areas for convenient night maintenance.
4. Component Activation Function: Supports positive and negative component power activation, allowing direct testing and troubleshooting of electrical components like relays and switches.
5. Extended Test Cable: Features a long testing cable for flexible vehicle-wide coverage, allowing effortless access to various electrical connection points.