- Multifunctional circuit tester: Provides voltage testing, positive/negative electrode detection, component activation, continuity and grounding testing, trailer lights and connectors testing, short circuit tracking and locating, and overload protection. - High-quality materials: Made from insulated, moisture-proof, heat-resistant, and durable ABS material. Features high sensitivity stainless steel probes for quick and accurate automotive circuit testing. - LED indicator and buzzer: Includes an indicator light and buzzer prompts to help identify automotive electrical system problems and speed up circuit diagnosis. If current exceeds 8A, the tester automatically disconnects and emits a buzzer sound. - Easy to use: Simple power switch operation. Comes with a 16 ft extended detection cord, a large crocodile clip, and an extended steel probe for one-handed operation. Compact and portable, a reliable addition to any automotive toolkit. - Practical use scenarios: - Quick automotive electrical diagnosis: test voltage and continuity, identify grounding issues, and locate faults in wiring swiftly using the extended probes and cord. - Short circuit detection and tracing: track and locate short circuits in harnesses or components with real-time feedback from the LED indicator and buzzer. - Trailer lights and connector testing: verify proper operation of trailer lighting and connectors to ensure safe and compliant towing.