GlowShift’s Black 7 Color Boost Gauge offers a unique combination of a high performance features including multiple backlit colors, a black face with a clear lens and color recall technology while still offering an affordable price. This model reads boost up to 30 PSI, as well as the engine's vacuum and compression levels between -30 to 0 inHG. This gauge is perfect to be used on any vehicle that has a turbo or supercharger, whether it is factory or aftermarket. Each black faced gauge sports a red illuminated needle with a full 270 degree sweep of the entire gauge allowing maximum accuracy. GlowShift’s ground breaking seven color LED technology allows the user to select a color of their choice to be displayed at anytime, as well as the choice of fast or slow color changing modes. The color recall technology allows the gauge to remember the previous color selected after the gauge has been powered back up. All Black 7 color Boost gauges come complete with 6 feet of nylon vacuum line, full installation instructions and a restricted t-fitting for an easy installation. The t-fitting allows the gauge to be installed at any vacuum line connected to the intake manifold. All products include a one year warranty and free technical support with each gauge.