Powerful and Efficient: This RV roof fan provides a fantastic air circulation for your RV Tralier or Camper. And it moves a lot of air but only use little power because of this durable and stable can motor. QUIET: 12 volt RV roof vent can intake or exhaust fresh air immediately and stay cool without distracting noise. 10-SPEED FAN REVERSIBLE : The fan can be operated in Reverse/Forward mode. This RV roof vent fan available in Low, Medium, Max on forward/reverse direction and Medium, Max on reverse/forward direction. EASY-TO-INSTALL: Fits all rough 14” x 14” inch roof openings. Built in fuse for circuit protection and 2 extra 5A slow fuse in the package. An extra screen included. Screws and white interior garnish included. This rv roof fan vent can be installed as ceiling fan or bathroom fan for your Recreational Vehicle. · Fit into all 14 inch x 14 inch RV roof openings. · Power: 18W / Current:1.8A / Voltage:12V. · Fan Motor RPM: 1200/M. · CFM : L speed 470CFM, M speed 650CFM, CFM: H speed 950CFM. · Air Flow Direction: Forward and reversible. · Install roof thickness: 1-3/5 inch to 9-3/4 inch. · Opening size: 14 inch x 14 inch. · Garnish: 16 inch x 16 inch. · Maximum Opening: 60 degree. · Vent Close Height: 4 inch. · Vent Open Height: 14 inch. Vent Open Hole Size :36CM36CM. · Fan Blade: 10 Clear fan blades. · Lid Material : High quality PC material with UV protection. · Manual Arm: Included. · Screen: Included and Removable. Note: Please run this Fan on a DCl2V System. AC or the voltage above 13.5V could damage the Fan.