Solatron Wall Solar Powered Vent/Fan, for Boat, Bathroom, Basement, Greenhouse, Shed, and More Fully automatic,powered completely by solar energy Prevent mold, condensation, mildew, musty odors, dampness, etc. Great for use in homes, kitchens, bathrooms, side-walls, attics, basements, dog houses, and more Water resistant, no-noise, safe and pollution free Cut out size: 4.33". Vent Dimensions: 8.25"x9.5". Air Circulation: 2100 Cubic Feet/Hour. Material: ABS Plasitc. Battery: No. Model: SWF-101 (integrated solar panel).