It can also be working with speed sensor. For details, see individual gauge description at link below. Install Diameter: 52mm/(2-1/16) mounting holes, screw on. Oil Pressure: 10184ohms, 0-145 PSI.
If you need other output signals, like 10-180ohms, 0-90ohms ect, Leave me a note. Water Temp: 287.422.4 ohms, 100-250F.
1 Press the Set button (less than 1 second) to change the back light color. Color in sequence : Red(Default)-Green-Blue-White-Yellow-Kelly-Orange-Purple-Auto Mode. Remarks : When users select the AUTO MODE, the backlight will be off for around two seconds, and switch automatically as above sequence per minute. 2 Hold the MODE button for three seconds for Switch TRIP01 or TRIP02 or COG to display. TRIP 01: (Default): total mileage for one working cycle, data will not be recorded when power off. TRIP 02: total mileage for one working cycle, data will recorded when power off, but, users could hold the set button for 35 seconds to clear. COG 00 : azomuth instantly indicating, data will not be recorded. Remarks : The unit of trip, total mileage and outta unit of dial are the same. Speedometer 7 color backlights can be switched backlight as shown below is just an example for your reference. (Tacho, fuel, water temp, volt, oil pressure , The backlight color of these 5 watches is red). Payoneer is my best preferred option. All messages be reply within 24hours. Welcome for wholesales trading, thank you!