Clear digital display The Automotive Test Light features a bright LED display for clear voltage readings in any lighting. Readings are shown with a 1V resolution for quick interpretation. Quick detection for multiple vehicles Designed for fast testing of car battery voltage across 3V to 48V systems. It is suitable for cars, trucks, SUVs, and marine charging systems, allowing rapid verification without swapping tools. Safe and durable design Constructed from premium ABS material, the test pen is shatterproof and ergonomic, providing comfortable, safe use while delivering reliable battery meter analysis. 2-3 practical use scenarios - In a garage or driveway, perform a quick battery voltage check before a road trip to prevent unexpected breakdowns. - At a boat or marine setup, verify charging system voltage to ensure batteries stay properly charged. - During service or diagnostics, check voltage across cars, trucks, and SUVs to troubleshoot starting or charging issues.