10 Colour Variable Stepper Motorized 52mm Boost Gauge New Generation Stepper Motorized Gauge 2" (52mm) diameter gauge -Black dial face when ignition is off. -10 colors backlights can be selected, and it can memory the setting in the both daytime and night mode. -Brightness can be selected in 6 different levels, and it can memory the setting in the both daytime and night mode. -3 buzzer types can be selected (slowly →fast→all the time). -4 buzzer levels can be selected. (silence →resounding) -5 Varations open ceremonies can be selected. A warning value (arbitrary) can be set and the warning buzzer can be selected from three variations or turn off. -Data obtained during driving (top value and warning value) can be stored up, and the top value can be reviewed and cleared. -Flat glass,high-definition scale and long,narrow pointer provides accurate indication and high visibility. -Brushless stepping motor is used to enable a smooth, instantaneous response to high performance sport driving.   -Daisy Chain Likeable Cable Included to Link from One Gauge to another without seperately wiring up another unit. (Second to last image in gallery) Common Button Operation: 1.There is a button in the backside of the gauge.They are used to review and clear top value,change the colors, adjust the brightness, choose the buzzer, set the warning etc. 2.Short press to switch between different functions settings,long press until buzzer sounds, then enter the setting mode.It will return to normal status when the button is released after 5 seconds. Power Wires Connecting : White wire : To 12V wire when ignition on Red wire :To 12V battery wire Yellow wire : To 12V wire when small lamp on Black wire : To ground