The O2COOL 10 Battery Portable Fan will help everyone stay cool even when there is no electricity around. It is ideal for indoor and outdoor activities. This portable battery-operated fan can be used when camping or just having an outdoor gathering in the backyard. Use our 10 Portable Fan in a hot office or school on a picnic and especially during a power outage. These battery-operated personal fans include a range of sizes multiple power source options patented blades for efficient operation and compact designs that allow them to be taken anywhere. The 10 fan needs six D-size batteries if it is going to be used where there is no electricity. It has a handle built-in for carrying so it can be transported easily. When in use the base pulls down for stability. If electricity is present it can be used as a traditional fan.