Multifunctional fan and mini size: it can be a desktop fan or a portable fan, meeting your different needs with a cool design, you can place the fan vertically or diagonally on the table, also very suitable for the office. You can easily take it with you when going out for picnics, shopping, traveling, camping, etc. It is small (87*40*158mm) and can easily slip into your pocket, backpack or beach bag. POWERFUL AND QUIET: Using our latest cutting-edge technology, our portable fan is capable of producing up to 3200 RPM at maximum speed while remaining relatively quiet to the decibels, quiet enough to run in a library. Operation Long Lasting & USB Rechargeable: 4000mAh high capacity battery can provide 5-20 hours working time (according to different speeds). The battery is rechargeable and not replaceable (for safety reasons). USB charging via computer, laptop, power bank, USB charger, phone adapter, car charger, etc. This portable fan runs on 110 or 220 volts and can be taken anywhere in the world. QUICK CHARGING AND ONE TOUCH OPERATION: The fan can be charged in just 3 hours, compared to 6 hours for other similar fans. The battery of this fan is designed for 2A current input (other 1A), which charges it faster. In addition, this battery-powered mini fan is easy to operate with just one button. Short press the button to turn on the fan, press repeatedly to adjust the fan speed or turn off the fan. Removable cover: The cover can be easily removed by gently rotating the cover, and you can clean the blades of the lid and even the interior as needed.