1The pointer is driven by a stepping motor to accurately display the engine speed, with high indication accuracy and relatively simple drive control. The liquid crystal display clearly shows the air pressure. 2The meter has a black dial and tinted lens with illuminated red needle. Each meter has a built?in color memory function, so you don't have to worry about changing the color of the meter every time you start the vehicle. 310?color series dual?needle air pressure gauge is designed to display the amount of air in the bag of 2 parts of the car or truck air suspension system. The air pressure reading ranges from 0 to 10 bar?2in (52mm). 4The instrument has 10 solid color modes and 2 color cycle modes, allowing you to match the factory dashboard lights or add your own personal style to the interior of the vehicle. 5Smoke?colored lenses are used during the day, and a clear and bright LED display is used at night. 10?color backlight can be switched at will, red pointer indicates, complete installation kit is included. 6The parameter display is accurate and stable, with low power consumption. Simple installation, stable performance, anti?vibration, anti?shock. 7Even if your Egt meter is turned off, it will still look great in your vehicle, going into a complete blackout state and creating a unique and customized invisible appearance. 8The black instrument surface with magnified colored lenses will enhance the overall style of your car or truck when it is installed on the dashboard, radio slot or driver's side pillar.