ECH Series-Hight Performance Gauge Feature:8 color backlight (can be adujstabled )Backlight Color Adjustment:1)Press the Set button (less than 1 second) to change the backlight color: Backlight changed in sequence: red (default) →green → blue → white → yellow → olive → orange → Purple → (automatic).2) Automatic: As the gauges was set with the automatic, the backlight will be off for 2 seconds then lighten up, and will switch the backlight color as above sequence.Specification:8 Color Backlight : red / green / blue / white /yellow / olive / orange / PurpleFixing dimension: 52mm(2'')Indicating Range: UP-DNSignal: 0-190ohmWorking Voltage: 9-32V(12V/24V)Operation mode: LCD display, stepper motoPackage Includes:1x Trim Gauge1x Multi-plug socket1x Installation InstructionSpecifications:Fixing dimension: 52mmIndicating Range: UP~DNSignal: 0- 190 ohmWorking Voltage: 9~32VBacklight: RedOperation mode: LCD display, stepper motorPackage Includes:1x Trim Gauge1x Multi-plug socket1x Installation Instruction