DC 12-24 V Voltmeter Gauge, Mini Digital Display LED Voltage Meter Gauge with Round Panel, Waterproof Battery Monitor Indicator for Car Boat Marine Truck (Green)Color: Green | Size: 1 PCSAbout this item Monitoring Function: The voltmeter gauge operates within a DC 12-24 V range and provides an accuracy of 0.1V. A display of 13.4-14.8 V indicates normal voltage after starting, while 12.2-12.8 V indicates normal voltage when not starting. If the value falls below 12 V, it’s time for a battery replacement. This feature allows for timely monitoring of the battery state between full charge and discharge. Digital Monitoring: These waterproof voltmeters feature a 3-digit precision LED digital display, making it easy to read the information. Real-time monitoring of battery voltage ensures a clearer understanding of the battery status, contributing to a safer driving experience. Premium Material: Constructed from copper and PC flame-retardant materials, these voltage panels are resistant to heat. They are characterized by their strength, wear resistance, waterproof properties, and low flammability, providing a high safety factor for long-term use. Easy to Install: The voltmeter is designed for effortless installation and fits into a 1 1/8" hole. Simply place the panel and secure it in place with the included nylon retaining nut. Wide Application: This voltmeter is suitable for DC 12V 24V vehicles, addressing diverse needs for practical usage. It is widely applicable in boats, cars, motorcycles, trucks, ATVs, UTVs, campervans, caravans, and more. Dimensions: 3.74 x 3.58 x 1.61 inches.