Portable and Handheld :Take this handheld fan with you wherever you go. Its compact size makes it easy to carry around and use on-the-go. USB Rechargeable :No need to worry about replacing batteries. Simply plug the fan into a USB port and charge it up. High Battery Capacity :With a 4000mAh battery, this fan can run for hours on a single charge Features: Built in 4000mAh battery,wireless and rechargeable,also can be used as hand fan/table fan; 100 speeds wind adjustable,from soft wind to strong wind,meet different needs; 3 in 1 multi-functional uses,standing,hand-held and hanging neck,apply to different places; Real-time battery power display,helps to charge the fan in time,in case the electricity runs out. Specifications: Charging input: 5V/2A Battery capacity: 4000mAh Charging time: 3-4 hours Product size: 65*67*165mm Material: ABS+PC+electronic components+polymer core Package included: Fan*1USB Cable*1Manual*1