e-joy Mini USB 3 Speeds Rechargeable Portable Table/Electric Personal Fan with LED Light Function (Model 3), 4.5" L 3 speed modes: Low-middle-high, small and exquisite, easy to carry Charging: You can connect the fan with USB cable to power bank and computer or any USB outlet or using a adapt plug to charge the fan battery High efficient and 2-8 hours long working time (depend on the mode you use) with LED light function (long press "on") for emergency use Portable mini fan powered by lithium rechargeable battery, house, office or outdoor, wherever you are, it always offers cool wind Note: There is insulating film to protect the battery during shipping, please remove it before use