This AutoMeter 3391 Sport-Comp 2-1/16” Voltmeter gauge has traditional incandescent lighting that illuminates around the perimeter of the dial to provide clear visibility during nighttime use. AutoMeter’s race proven air-core electric instruments provide quick and accurate readings. It is also 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system. Gauge kit includes bulb and socket assembly, red and green bulb covers, mounting hardware, gauge bracket kit #2230 and detailed instructions for installation. AutoMeter 3391 Sport-Comp 2-1/16” Voltmeter Gauge Features: Gauge Diameter: 2-1/16 in. Gauge Style: Analog Sending Unit: Electrical Gauge Range: 8-18 V Gauge Face Color: Black Gauge Number Color: White Pointer Color: Red Bezel Color: Silver Illuminated: Yes Liquid Filled: No Sending Unit Included: No Quantity: Sold Individually AutoMeter offers a variety of Sport-Comp gauges to monitor your vehicle’s data, and they are available in the range as well as size to perfectly fit your ride. When you're serious about performance, trust AutoMeter gauges!