Stay cool -- whether you"re near an electrical outlet or not -- with this powerful, portable fan. Keep one or more on hand for emergency power outages, camping, sporting events or outdoor activities. And when the power is back, just plug it in.Two Power SourcesRunning on 8 "D" size batteries (not included), this fan"s 10" blades deliver up to 40 hours of strong, reliable air flow. Or it can be plugged into any standard outlet using the included AC adapter. The batteries go into the U-shaped anti-tip base, their weight adding even more stability.Great for Travel The compact, folding design is easy to take with you on camping trips, beach parties, tailgating and other outdoor adventures, as well as to office cubicles or school classrooms with limited electrical access. Two-Speed, Tiltable Fan Head This versatile fan also lets you customize your breeze. You can set it on low or high speed. And you can adjust the angle of the fan head so that the breeze always hits just the right spot, whether the fan is sitting on the ground or a higher surface. Combining the portable convenience of a personal battery fan and the power of an electric box fan, it"s really the only fan you need!