Portable ceiling fan design with usb cord ,doesn’t contain a built-in battery, Fit for USB plug power. can be plug to USB wall charger (2A)or USB outlet. | MINI SIZE :16.5 Inch ceiling fan great for hot summer and windless day, also for outdoor camping tents. | Hanging fans are Compact and lightweight, Soft wind with little noise, Safe to use and energy saving. | Tent Ceiling Fan Power source : 5V-output 2A USB Power(CHARGER NOT INCLUDED). | Quality camping fan with 3 blades, good airflow, easy to install and dismantle.