As innovations continue, requirements and standards are lifted to ensure efficiency and performance. The same goes for devices in the marine industry. A voltmeter, for example, has evolved in time with the latest features. This Faria Voltmeter measures the volts in a battery. It shows the energy reserve which indicates if the equipment works well or if there are issues. Volts level on a running engine may drop at a certain level or if the alternator is not working. A voltmeter allows you to see whether there s an electrical drain. Key Features: Perimeter-lighted stylish blue and black dial with a contoured white pointer Polished stainless steel bezel Domed glass lens 2 inches gauge requiring a 2.062 inches (53 mm) mounting hole Volts of direct current is between 10-16 VDC Prevent exposure of excess auto-ranging voltage Specifications: Brand: Faria Beede SKU: 13705 Weight:0.05 pounds Size: 2 inches Material: Alloy Steel Application domain: Voltmeter Color: Black Item Dimension: 4 x 4 x 3 inches Country of Origin: USA Condition: New