Difi Advance CR 2.5inch Auto Gauge Meter Turbo BOOST/Water temp/Oil Temp/Oil Pre/RPM/Volt/Vacuum/EXT TEMP/AFR/Fuel Pre Gauge 1, This gauge work withStepper motor and electronic sensor.2, Stepper Motor is more fast more accurate.3, Turbo Gauge, Vacuum Gauge, EXT Temp Gauge, Oil Pre Gauge, Volt Gauge, Oil Temp Gauge, Water Temp Gauge, Tachometer & Vacuum Gauge are available.4, Gauge dials are invisible while the ignition switch is off. Once the ignition switch is turned on, a clear display appears with white LED illumination. A red emitting needle pointer increases visibility.5, The illumination color can be adjustable from white and amber red6, Double Warning function by a meter's LED lamp and a beep7, only for 12V vehicles8, work without the control unit9, This is universal meter gauges that can fit any car10, Gorgeous Opening mode and Ending model.Functions on the gauge:1.Peak Setting2.Color Choose3.Bright Level4.Buzzer Type5.Buzzer Level6.Open Ceremonies7.Warning Setting8.Zero position adjustmentPackage including:1 * Gauge1 * Hat and Holder1 * Sensor (Water temp, oil temp, oil pre, vacuum,turbo,ext temp. fuel pre)1 * Bolts Pack1 * English instruction