Mini Foldable hanging neck Cooling fanThis is a hand held fan, three in one power bank, foldable, hanging neck This product supports 90 rotating folding design, which minimizes the space of the backpack and supports desktop placement for office use. This product is very versatile and practial, you can put it in your bag for summer travel or outdoor sports. 3 Adjustable wind speed. you can control wind volume as you need. With slow wind speed,you can use fan for kids when they sleep.