Description REVERSE CONNECTION PROTECTION: This 12V voltmeter is easy to read, can monitor battery voltage in real time, and has reverse connection protection, allowing you to easily understand the battery status. Timely grasp the battery voltage status between full charge and discharge of this DC voltmeter. REAL-TIME VOLTAGE DISPLAY: Accurate 3-digit LED digital voltmeter display . With a red LED indicator, the numbers are easy to read and the display is clear at night. SIMPLE AND COMPACT: Mini size and easy to install, very suitable for checking voltage. Waterproof and durable, long service life. Car digital voltmeter with measuring range: 8V - 26V. Widely used: voltage measurements can also be used for other products. Suitable for 12V 24V Cars, Motorcycles, RVs, SUVs, Off-Roads, ATVs, Boats, Ships, Vessels, Trucks, Tractors, Substation Automation, distribution automation, test equipment, voltage regulator, etc.