DaierTek Battery Voltage Meter Waterproof DC 12V 24V LED Blue Voltmeter Product Details Package Dimensions : 6.57 x 4.29 x 1.06 inches; 1.76 ounces Manufacturer : DAIERTEK Brand: DAIERTEK Power Source: Battery Powered Style: Modern Color: Blue LED Voltmeter Min. Operating Voltage: 8 Volts ?Meet Different Needs? The 12V round voltmeter comes with a panel and a nylon nut, which can be mounted separately on the 29mm diameter mounting hole or fixed on the matching panel, so that it could meet your different mounting needs. ?Blue LED Display? This 12V battery meter with blue LED light, can be widely used under DC 12V 24V. With the digital voltage meter, you can easily monitor the voltage status of your car battery in real times, especially in dark environments. ?Waterproof Useful? The marine voltmeter gauge is waterproof design, so this LED voltmeter is safe to use even in moist environments. And also the mini voltmeter is fit for 12V 24V cars, automotive, motorcycles, RVs, SUV, Off-road, ATV, boats, marine, ships, trucks, tractor, etc. ?Measuring Range? The rating of this battery voltage monitor is DC 8-48V, and its accuracy is 0.1V. With the precise 3-digit LED digital voltmeter, you can better monitor of the car's battery voltage status, helping to extend battery life. ?Easy installation? This 12 volt battery monitor comes with a set of wires, two mounting screws, a matching panel and a nylon nut, making it easy to install and use.