REVERSE CONNECTION PROTECTION: This 12V voltmeter is easy to read and monitors battery voltage in real time. It features reverse connection protection, allowing you to easily check battery status and track voltage levels between full charge and discharge. REAL-TIME VOLTAGE DISPLAY: Features an accurate 3-digit LED digital display. The red LED indicator ensures clear visibility, even in low light or at night. SIMPLE AND COMPACT: Small size and easy to install, ideal for voltage monitoring. Waterproof and durable design ensures long service life. Measures DC voltage from 8V to 26V. WIDELY USED: Suitable for 12V and 24V vehicles and systems, including cars, motorcycles, RVs, SUVs, off-road vehicles, ATVs, boats, trucks, tractors, and more. Can be used in substation automation, distribution automation, test equipment, and voltage regulators.