O2COOL 1078 Indoor/Outdoor Battery/AC-Powered 10-Inch Portable Fan Measures approximately 4 by 12 by 14-inch. Sleek modern design; compact size takes up minimal space Runs cordlessly for up to 72-hours; quiet operation Works with included AC adaptor or 8 D-cell batteries; not included 10-Inch 2-speed portable fan for indoor or outdoor use