Auto Meter 5677 Elite 2-1/16" 30 in Hg-30 PSI Boost-Vacuum Gauge 7 user selectable colors (blue, white, red, green, cyan, violet, and yellow) to match visual preferences of driver and visibility conditions Built-in Pro-Control circuits with custom programmable activation & deactivation points for key functions like lights, fans, switches, & pumps allow drivers to focus on the competition while the gauges control key vehicle systems Set custom alert High and Low points specific to your vehicle & receive full dial warning notification to highlight the need for driver attention Acquire data for later review with one-touch Peak Recall functionality Data logger 0-5V output provides ECU and data systems with vital information