Specification: Gauge Size: 3.75 Inch (95mm) RPM:0-11000 RPM Movement structure: High speed Stepping Motor Backlight:7 Colors Light(can be adjustable) RPM Warning settings: Can be set Fit to All Kinds of 1-8 Cylinder Engine Cars Only for 12V vehicles Fitment:For 12 volt, 1 to 8 cylinder, gasoline carPackage Included:1 X Tachometer1 X Allen wrench1 X Installation Manual