Origin:Mainland China One controller is required to control all gauge work! One controller is required to control all gauge work! 1, This gauge work with electronic sensor. 2, Turbo Gauge, Vacuum Gauge, EXT Temp Gauge, Oil Press Gauge, Volt Gauge, Oil Temp Gauge, Water Temp Gauge, Tachometer & Vacuum Gauge are available. 3, 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. 4, The illumination color can be adjustable from white and amber red 5, Double Warning function by a meter's LED lamp and a beep 6, only for 12V vehicles 7, work without the control unit 8, This is universal meter gauges that can fit any car 9, Gorgeous Opening mode and Ending model. Functions: 1.Peak Setting 2.Color Choose 3.Bright Level 4.Buzzer Type 5.Buzzer Level 6.Open Ceremonies 7.Warning Setting 8.Zero position adjustment Package including: 1 * Gauge 1 * Holder Set 1 * Sensor 1 * Bolts Pack 1 * English instruction