Rechargeable Battery: The personal fan is powered by an upgraded rechargeable battery that keeps it well and has a longer battery life, it comes with a charging cable, you can charge it from a regular outlet, computer, or any other device via a USB port. Powerful wind & 3-speed setting: This portable desktop fan has built-in powerful brushless motors, which are powerful enough to stably drive the fan blades to run at high speed to generate strong wind. The fan has 3 adjustable wind speeds, You just need to press button to change the wind setting and the wind is strong enough to cool you down quickly. Desktop Fans: fans can work stably and continuously when connected to a power source.