O2Cool 5--Inch Portable Camping Clip Fan -Heavy-duty clip allows you to use fan almost anywhere. Fan head rotates and pivots to direct airflow where needed. Powerful two-speed fan offers quiet cooling. New rugged design makes it great for camping and being outdoors. Requires 4-AA batteries (not included). Battery life (varies by type of batteries used) High speed-11hrs/Low speed-14hrs. Blade size: 5 inchesNumber of speeds: 2Number and Type of Alkaline Batteries: 2 D-Cell batteries (not ncluded)Product Dimensions (retail packaging): 9.1 x 5.7 x 10.5 in