Specification: Fit For:Car, Truck, Motorcycle Marine, Golf Carts Face Color:Black Bezel Materials:316 Stainless Black Bezel Grade of protection :IP67 Package method :Neutral box Speedometer and tachometer: Operating Voltage:9-32V Operating Current:≤100mA Operating Temperature:-30~+75 ℃ Storage Temperature:-40~+85 ℃ Install Diameter: 85mm(3-3/8") Backlight:Red This tacho must be hooked up to the "W" terminal on vehicle alternator. Many diesel engines and most inboard gas boat engine alternator have this connection. It can also work with speed sensor,flying wheel, ECU ,hei distributor. it won't work with coil side Minor gauges: Install Diameter: 52mm/(2-1/16") Input Ranges Oil Pressure: 10~184ohms, 0-145PSI Fuel Level: 240-33ohms Water Temperature:287.4-22.4ohms, 100-250F Volt: 8-16V.
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