Specification:-Fixing dimension: 52mm(2 quot;)-Indicating Range: 0-99999.9H-Working Voltage: 9-32V(12V/24V)-Hour Meter cannot be reset.-Operation mode: LCD display,Package Includes:1x Hour Meter1x Multi-plug socket1x Installation InstructionFeatures:-Use moving-magnet principle to drive the needle, featuring good endurance and anti-vibration.-IP67 waterproof and dustproof grade-Stepper motors used for full range of stepping gauges, great feature with its less power consumption, longer life, higher precision, etc. -With curved glass (with anti-fogging function) -With ultra-wide working voltage design( long-term operating voltage: 9-32V, Maximum up to: 36V ( 1 min )).-8 color Backlight : redgreenbluewhiteyelloworangeolivinepurple, totally 8kinds different backlight color, it will change automatically every 1 minute.You can fix only one color you like by pressing the gauge back quot;set quot; buttonBacklight 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 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.