What it does: A multifunctional automotive circuit tester that checks electrical systems, continuity, polarity, grounding, and detects voltage — ideal for vehicle owners and technicians who need quick, reliable electrical diagnostics. Key benefits: Eliminates guesswork — instant LCD readout shows clear values so you can identify faults faster. Works in low light — built-in flashlight provides illumination during under-hood or roadside checks and can serve as an auxiliary light when clips are attached to the battery terminals. Reaches where you need it — a 5-meter long wire lets you test from the battery to the dashboard or other hard-to-reach areas without stretching or relocating the vehicle. Simple to use — connect the red clip to the positive terminal and the black clip to the negative terminal to power the light and display battery voltage in bright blue digits. Features and performance: Multifunction testing: electrical system checks, continuity, polarity, grounding, and voltage detection. Clear LCD display with bright blue digits for easy reading. 5-meter cable for extended reach and convenient access to dashboard and component locations. Red and black clips for straightforward positive/negative connections. Built-in flashlight for testing in dim environments or as a temporary auxiliary light when clips are attached to the battery. Who it’s for: Vehicle owners who want a compact, easy-to-use tool for routine battery and wiring checks. Technicians and mobile mechanics who need a portable tester with extended reach and readable output. Typical use scenarios: 1. Diagnose a vehicle that won’t start by checking battery voltage, polarity, grounding, and continuity from the battery to the dashboard without moving the car. 2. Inspect wiring and fuses in low-light conditions using the built-in flashlight, then verify continuity and grounding with the same tool. 3. Verify polarity and voltage when installing or troubleshooting aftermarket electronics to ensure correct connections and safe operation. Operation is straightforward: attach the red clip to the positive terminal and the black clip to the negative terminal — the tester’s light activates and the LCD displays the battery voltage in bright blue digits for immediate, easy-to-read results.