Turbo boost gauge for cars with LED backlight and sensor1、The boost/vacuum gauge is designed to monitor the boost pressure and vacuum compression level of your car's turbocharged or supercharged engine. ‑1‑2 bar display range to ensure that the turbo will not over boost and avoid major damage to the engine. 2、Luminous red pointer, a tinted magnified lens to ensure easy monitoring of all readings, and 10‑color through dial LED light system. Simply press the button on the front of the meter to easily select and change the color of the numbers and scale lines on the meter surface. 3、With 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. 4、With a dimmer function, you can connect this meter to the headlight switch so that it can be dimmed by 30% when the headlights are turned on to get better visibility when driving at night. 5、Includes a T-connector and 6ft black silicone vacuum hose, allowing easy tapping of any vacuum line connected to the intake manifold for easy installation.