Product Name: ECH Series High Performance Meter Universal Car Voltmeter Waterproof Voltage Meter Volt Meters 8-16v LCD IP67 for Auto Boat Yacht RV Motorcycle Vehicl e Features 8colorBacklight: red.green.blue.white.yellow.olive.orange.purple, totally 8 kinds different backlight color, it will change automatically every 1 minute. you can fix only one color you like by pressing the gauge back "'""'"set"'""'" button Multi-color backlight( Ajustable eight-color backlight). Customers can only set one color that you like according to their needs. Ultra-wide working voltage design, long-term working voltage: 9-32V, up to: 36V 1 minute Compatibility:Products can be used in engines, generator sets, ships, construction machinery, agricultural machinery, automotive conversion and other fields Material:The front cover of the instrument is made of stainless steel 316L. It can be used for a long period of time even in acid-alkali and humid environment. stainless steel 316L bezel+anti-fog glass+pvc The entire series of pointer instruments adopts instrument stepper motor cores, which can make the products have the advantages of small efficiency, long life, and high precision. Curved glass (with anti-fog function). Specifcation IP67 Waterproof Install diameter:52mm Indication range:8~16V Working voltage:9-32VDC Input signal:8~16V Working current::60mA Operating temperature:-30~+75 Storage temperature:-40~+85 Package includes: 1 x Volt meter 1 x Wiring harness 1 x Instruction manual Instrucion: In the normal display state, the short press (less than 1 second) the "'"Set"'" button, you can switch the backlight color.The order of backlight :red (default), green, blue, white, yellow, olive, green, orange, purple You can also set the Automatic mode:automatically switch the backlight color once every 1 minute