1.Easily display at night:Our instrument is highly visible with a Light,easy viewing at all angles during any lighting conditions,It constantly monitors the changes of oil, water temperature and voltage,practically and safely when driving at any time 2.WATERWICH Read Range:Our Gauge will precisely monitor the oil pressure level within your engine that is in the range of 0-100 Psi,WaterTemperature Gauge Reads Coolant Temperature Levels from 100 ℉ to 250 ℉ Fahrenheit,Our voltmeter gauge accurately measure the output voltage of the vehicle electrical system between 8 – 16 volts 3.Simple Installation: The product is equipped with necessary accessories and instruction manual,without professional skills and complicated tools 4.Material: The shell of gauge is made of ABS and metal material, which is scratch-resistant and wear-resistant, corrosion-resistant and has a long service life. 5.The product is a three in one automobile instrument, including oil pressure gauge, water temperature gauge and voltmeter. Diameter 2inch 52mm automobile universal digital meter,Wide Compatibility for Car,SUV,Truck,Vehicle, Motorcycles, Tractors and Marine Engines etc