Features: Speed Adjustable - The portable fan with 4 adjustable speed is adequate for your various cooling demand. Sturdy Base - Designer four rubbers on the bottom of the pedestal keep the fan firmly in place even at the high speed. Battery Powered and USB Rechargeable - Comes with a built-in 4000mAh battery and oneUSBcable that compatible with all USB port, such as computer, power bank, wall chargers and any other USB-enabled power supply. 90 Foldable - The battery portable fans can be folded into small fan for saving space, you can bring it to office, library, gym, etc. Detachable for Easy Clean - The USB cooling fans have detachable cover, you can easily remove and wipe the blades to keep the delicate fan clean. 120 Rotatable Head - The battery powered desk fans with 120 rotating fan head to supply multi-angle wind. Breathing Night Light - Convenient your use at night. 3.