SkyGenius Battery Operated Clip on Mini Desk Fan, Black Unique Design - Original, fashionable, powerful, potable battery clip fan Powerful - High quality motor, max wind speed 10.5ft/s, high speed and low noise, stepless speed regulation. Better Quality Battery - Replaceable and Rechargeable 2600mAh 18650 battery ( INCLUDED ),2.5~6 hours working time depend on different speed,USB charging from a computer,power band,USB Charger,Can be also powered by USB power source Compact Size - 19*15*10cm(7.5*6*4 inch), portability, handy, lightweight, 360 vertical and horizontal rotation Clip Style - Can be Put or Clip on anywhere you want, great for baby stroller, home and office, laptop, gym workout, car backseat, outdoors, camping, trips and anywhere need cool wind