Longer Working Hours, Rechargeable or USB Powered The rechargeable clip on fan operates with 3600mAh and can operate for 6 - 15 hours after a full charge. It can also be used via a USB port from your PC/computer/USB charger or other USB devices.Stable Clamping & 360RotationThe The Clip on fan has a strong and stable wind that keeps you cool. not disturbing your rest and work. The Battery desk fan has 360 degree adjustable rotation, great for air circulating from various angles and directions.4-stage adjustable wind speed & Quietness Small but powerful. 4-stage easily adjustable wind speed. The speed of this portable desk battery fan can also be adjusted among low, medium, high and nature according to your demands. It is decent and quiet which ensures the peaceful flow of air, and enough for personal use.Safe & PortableUsed used high-quality ABS and Brushless copper motors. It has stable performance and a long operating life. And It is trouble-free to put this small ( 7.5*5.5*5 inch, weight- 347gram ) and the exquisite battery fan into your bag and carry it for outdoor events. Also, it can be used for indoor use. Ideal suitable for office, family, dormitory, library use and etc.Package Content & Customer ServiceYou You get one Portable Clip on Desk Fan, one USB cable, and one user guide