Características [ How to connect wires ? ] Red wire connect to +9-32VDC; Blue wire connect to Ground(-); Orange wire connect to Blacklight [ How to install it ? ] Open a hole of 52mm (2 1/16") in the panel and allow a clearance of 70mm (2 3/4”) behind the panel to fit the gauge. Put the gauge in the hole and screw down. [ Widely used ] Suitable for all cars, tractors, vans, vessels, boats, yachts, etc. IP68 Waterproof. Could work underwater 1M. [ Back Light ] 7 different backlight adjustable. Red, Green, Blue, White , Yellow, Grass, Orange, Purple, Auto Peso 110.00 Gramos Destacados [ How to connect wires ? ] Red wire connect to +9-32VDC; Blue wire connect to Ground(-); Orange wire connect to Blacklight, [ How to install it ? ] Open a hole of 52mm (2 1/16") in the panel and allow a clearance of 70mm (2 3/4”) behind the panel to fit the gauge. Put the gauge in the hole and screw down., [ Widely used ] Suitable for all cars, tractors, vans, vessels, boats, yachts, etc. IP68 Waterproof. Could work underwater 1M., [ Back Light ] 7 different backlight adjustable. Red, Green, Blue, White , Yellow, Grass, Orange, Purple, Auto La calificación que le dan a 52mm(2") Hour Meter Gauge for Marine Boat Car Motorcycle Hour Gauge Timer Gauge 9-32V IP68 Waterproof 7 Color Backlight, 16 usuarios es de 4.5 sobre 5 estrellas.