Introducing the new Revel VLS (Visual OLED System) 52mm OLED gauges for accurate and dependable monitoring of vital engine components. Maximum comfort is attained by the use of an OLED (Organic Light Emitting Diode) numerical display. When compared to a traditional LCD display, the OLED display provides sharper contrast resulting in a deeper black for a crisp, clear images that is easier to read at a glance. The technology also allows for undistorted viewing angles approaching 170 degrees. The OLED display also does not require a backlight to be clearly visible at night, which gives the slim profile of the gauge - perfect for mounting in areas where space is an issue. All packaging includes the gauge and necessary sensor, mounting bolts, hood, and instruction manual.