GlowShift Tinted 7 Color Series Water Temperature Gauge is Designed to Monitor Display the Coolant Fluid Temperature Running Through Your Car or Trucks Radiator System Water Temperature Readings from 100 to 300 Fahrenheit 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 1827 NPT Temperature Sensor, 2 PowerSensor Harness, Gauge Visor, Mounting Hardware Installation Instructions GlowShift Guarantee with One Year Limited Warranty Free Lifetime Technical Support