- MULTIFUNCTIONAL CIRCUIT TESTER: This essential tool for vehicle owners and technicians efficiently checks electrical systems, continuity, polarity, grounding, and voltage detection, streamlining diagnostics and repairs. - BUILT-IN FLASHLIGHT: Featuring an integrated flashlight, this tester enables easy operation in low-light conditions. It can also serve as an auxiliary light by connecting the clips to the battery terminals, enhancing visibility during troubleshooting. - EXTENDED REACH: The 5-meter wire provides ample length to easily connect from the battery to the dashboard. The clear LCD screen displays values prominently, allowing for quick and accurate readings. - EASY OPERATION: Activation is straightforward: simply attach the red clip to the positive terminal and the black clip to the negative terminal. The tester instantly illuminates and shows battery voltage in bright blue digits for effortless monitoring. APPLICATION SCENARIOS: 1. Use this circuit tester to diagnose electrical issues in your vehicle, ensuring all systems are functioning correctly before a long trip. 2. Ideal for automotive technicians, this tool simplifies the checking of vehicle batteries and electrical systems, saving time and improving accuracy during inspections. 3. Perfect for DIY enthusiasts, this tester allows for quick checks of vehicle wiring and connections, helping to prevent electrical faults and ensure safety on the road.