【 Longer Working Hours, Battery Operated & USB Powered 】 viniper brand rechargeable small desk fan operates with 3600mah and can operate for 8-24 hours after a full charge. At the same time, the bi-directional optimization of the motherboard and battery makes the viniper usb rechargeable fan have longer working hours. It can also be used via USB port from your PC/computer/USB charger or other USB devices. | 【3-stage adjustable wind speed & Quietness】 Small but poweful. 3-stage easily adjustable wind speed. The speed of this portable desk battery fan can also be adjusted among low, medium, and high according to your demands. it is decent and quiet which ensure the peaceful flow of air, and enough for personal use. | 【Strong Cooling & 180°Rotation】The viniper small desk fan has a strong and stable wind that keeps you cool. not disturbing your rest and work. The USB desk fan has 180 degree adjustable rotation. | 【Safe & Portable】Used high-quality ABS and Brushless copper motor. It has stable performance and long operating life. And It is trouble-free to put this small ( 6.2*6.2*2.3 inch, weight-9 ounces) and the exquisite battery usb 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】You get 1*viniper Portable Battery Desk Fan, 1* USB cable, 1* user guide, Please write amazon email to us for help if meeting any problem. We will respond within 24-hours.