Portable 3-in-1 Fan with Rechargeable Battery. Enjoy a cool breeze even on the hottest summer days. The fan features a 2000mAh rechargeable battery that can charge your phone in emergencies. It is safe for use by adults and children, thanks to the soft silicone blades and the automatic shut-off function. With a simple motion, the portable fan transforms into a tabletop fan, providing coolness and comfort while you work or relax at home. Its slim and foldable design makes it perfect for carrying in your bag.