Powered by USB female port or Type C port, For phones with function. You can also use USB male to Type C female adapter or USB to USB female adapter to this fan,then to Powerbank USB or PC also can work(adapter is not included)The cell phone must with function For Smart phone/Laptop/tablet/Wall with USB or Type C port Can use for power supply. Portable Fan: room fan, which is very compact to be placed in living room, bedroom, office , also it's very powerful fan too, bring you the better cooling feeling in hot ! Sport Fan You can hold it in your hand, standing on the desk/table, fit in pocket, camping backpack, handbag or purse and take it you are going. Best using for Shopping, School, Factory, Camping, office, kitchen or outdoor sports such as Fishing, Hiking, Backpacking, BBQ, , Biking, Boating