Open a 2 inch dimension and 2-1/5 inch depth hole, put gauge into it and fastenMade of high-quality stainless steel for long-term use even in acid-base, humid environmentA 3-in-1 multi-function digital meter integrating Water Temp Gauge, Voltmeter, and Oil Pressure GaugeThe instrument has its own alarm signal, and no need additional alarm signal by the sensor.High brightness LED backlight, high brightness and long life.Waterproof:IP67Backlight: TFT ScreenVoltmeter: 9-32VWater Temperature:40~120 Celsius,287.4~22.4 ohmOil Pressure: 0-10 bar (Pressure sensor: 10-184ohm)Colour:blackMaterial:stainless steelPackage Contents:1 * 3 in 1 Multifunction Gauge1 * Multi-plug socket1 * Chinese and English manualOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.