Specifications: Item Type: Digital Oil Pressure Temp RPM Gauge Material: Stainless Steel 316L Bezel + Antifog Glass Level: IP67, fully with excellent antifog function Display: Voltage + Oil Pressure + Backlight Color: Red (default), Green, Blue, White, Yellow, Yellow Green, Orange, (color switchable) Operating Voltage: 9-32VDC Operating Current: ≤60mA Operating Temperature: -30℃ to +70℃ Storage Temperature: -40℃ to +85℃ Level: IP67, can work underwater at 1m depth Applications: Boats, Yachts, RVs, Trucks, Motorcycles Wiring: Red Wire - +9-32VDC Black Wire - Speed Input Orange Wire - Backlight Blue Wire - Power Negative (-) White Wire - Oil Pressure Input Wire - Temperature Input Gauge Function Instructions: 1. Short press the Mode button (less than second) once to change the backlight color: backlight is red (default), green, blue, white, yellow, yellow green, orange, purple. 2. press the Mode button (>4 seconds) to enter setting mode: a. Short press the button (2 seconds). b. Scroll to the desired parameter group for the gauge, release the button, wait 4 seconds without op for data to be saved automatically and exit setting mode to normal display mode. c. Once in the tachometer speed ratio setting mode, holding the button will continuously increase the numerical value, release the button for the value to decrease continuously. Speed ratio adjustment range: 1?300.0. Adjust to your desired speed ratio value, release the button > 4 seconds, the number is automatically saved. Between 1?12.0 speed ratio, the step value is 0.1, between 12.0?300.0 speed ratio, the step value is 0.5. How to Use Installation Steps: Step 1: a 52?53mm diameter hole in your central control or other pre?installed location, ensuring there