Keep tabs on the health and output of your vehicles electrical system safely and accurately with AutoMeter's ultra precise Digital Stepper Motor Voltmeter. With precise resolution and ultra smooth needle movement, this gauge operates anywhere from 8-18 volts on negative ground electrical systems. A direct plug in wiring harnesses included for ease of installation. Product Features:7 user selectable colors (blue, white, red, green, cyan, violet, and yellow) to match visual preferences of driver and visibility conditionsBuilt-in Pro-Control circuits with custom programmable activation and deactivation points for key functions like lights, fans, switches, and pumps allow drivers to focus on the competition while the gauges control key vehicle systemsSet custom alert High and Low points specific to your vehicle and receive full dial warning notification to highlight the need for driver attentionAcquire data for later review with one-touch Peak Recall functionality