Specification: Fit For:Car, Truck, Motorcycle ATV UTV Marine Face Color:white Bezel Materials:Stainless Steel Grade Of Protection :IP67 Package Method :Neutral Box Speedometer and tachometer: Operating Voltage:9-32VDC 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 be working with speed sender flying wheel, ECU or hei distributor. Minor gauges: Install Diameter: 52mm/(2-1/16") Input Ranges Oil Pressure: 10~184ohms, 0-145 PSI/0-10bar Fuel Level: 240-33 ohms, E - F Water Temperature: 287.4~22.4 ohms, 100-250F Volt: 8-16V.
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