Evaporative Fan Cooler Portable Desk Office Home Kool Down Ozone Friendly Don't waste time and comfort on clunky fans that simply push around the hot, dry air! Portable mini "air conditioner" pulls warm air from the room to give you cool, moist air for hours! 28-oz. water tank, cools 49 sq. ft. area for up to 10 hours. Add ice-cold water to tank for ultra-cooling action then adjust pivoting air vents to direct cool air where you want it. Includes DC adapter or uses 4 C batteries, not included. 10.25" x 6.5" x 5.25"