Features front sealed bezel design for added water resistance and UV protected paint on dial pointer for added protection against sun damage. 12 and 16 volt compatible well-suited with nearly every marine electrical system. Gauge kit includes bulb and socket assembly red and green bulb covers corrosion resistant mounting hardware and detailed instructions for installation. 12 month limited warranty. Autometers Race Proven Air-Core Electric Instruments Provide Quick And Accurate Readings While Keeping Hazardous Fluids Outside Of The Boat. Traditional incandescent lighting illuminates around the perimeter of the dial