Small In Size, Big On Function Combined with Fan + Backup Power Bank function, the fan would be an everyday-carry-essential fan to cool you off in hot day and is multifunctional to satisfy your diverse needs. 14-21 Hours Cooling TimeUp to 21 hours cooling time in one full charge. Super long battery life allows you to enjoy it while travelling, commuting, working and any other outdoor activities. This mini handheld fan is USB rechargeable through regular usb socket, laptop, power bank or car charger. A Palm-sized Featured with unique and pocket size design, F8 portable fan is easy to jam into a bag to tote around. 3-Stage Transformable FanAble to be completely folded to hide the blades, making it small and compact enough to slip into nearly any pockets. It's a handheld fan when 180folded and a desktop fan when 270folded.