High-powered fan adapts to varying temperatures and environments while being easy to operate and maintain. High-powered, 10-blade exhaust fan to keep air fresh inside your RVFour fan speeds to adapt to varying temperatures and environments and easy operation with push-button controls on the fanSpeed-1 setting circulates air without draining RV batteries12V DC power for compatibility with travel trailers, 5th wheels and other RVsFlush-mount design for a sleek, unobtrusive look and fits 2" to 7" thick roofsLid opens and closes manually using integrated knob and recirculates the air even when closedRobust and smooth open / close lid mechanism and removable, easy-to-clean insect screenComes ready to install with the necessary butyl tape, sealant and hardware1 Year WarrantyWhat's Included roof vent fan with lid installation hardware tube of self-leveling sealant roll of butyl tape 6" trim ring