- Multifunctional automotive circuit tester that checks electrical systems, continuity, polarity, grounding, and voltage detection, providing clear indicators for vehicle owners and technicians. - Built-in flashlight for testing in low light and can serve as an auxiliary light by connecting clips to the battery terminals. - Extended 5-meter reach lets you test from the battery to the dashboard, with clear LCD readings for easy interpretation. - Easy operation: attach the red clip to the positive terminal and the black clip to the negative terminal to activate the light and display the battery voltage in bright blue digits. - Use scenario: roadside or shop diagnostics to verify battery voltage, polarity, and grounding quickly. - Use scenario: testing continuity and polarity of lighting circuits and wiring harnesses during installation or troubleshooting. - Use scenario: working in dim environments under the hood, using the built-in flashlight while reading values on the LCD display.