Features:- Used to measure the water temperature of automobile.- Blue light on the dial for easy reading in the darkness.- Suits 12 volt applications.Description:Color: WhiteBacklight:BluePower: 12V DCUnit: Celsius DegreeSensor Mounting Thread: NPT 1 / 8 "Measurement Range: 40-120 Celsius degreeGauge Diameter: 2" / 52mmPackage Included:1 x Water Temp Gauge1 x Water temp Sensor1 x Bolts Pack1 x Installation Manual