GlowShift Tinted 7 Color Series 30 PSI BoostVacuum Gauge is Designed to Monitor Boost Pressure Vacuum Compression Levels of Your Cars Turbo or Supercharged Engine Boost Readings from 0 to 30 PSI Vacuum Readings from 30 to 0 inHg 2116 52mm Gauge with Black Dial, Tinted Lens Illuminated Red Needle 7 Solid Color Modes 2 Color Cycle Modes Allow You to Match Your Factory Dashboard Lights or Add a Custom Style to the Interior of Your Vehicle Colors Include Blue, Red, Green, Teal, Purple, White Yellow Connecting the Dimmer Wire to the Headlight Switch Reduces Brightness of the Gauge by 30 When the Headlights are On Includes 6 Silicone Hose, 18 TFitting, 2 Hose Clamps, 2 Power Wire, Gauge Visor, Mounting Hardware Installation Instructions GlowShift Guarantee with One Year Limited Warranty Free Lifetime Technical Support