MAIN FEATURES Flexible Rotation: 360°vertical and horizontal rotation can keep you cool from any angle. Powerful Wind: A high-quality motor, max wind speed 16.5ft/s, strong airflow, and low noise, 3 adjustable speeds for different preferences. Long Battery Life: Replaceable and Rechargeable 2600mAh 18650 battery ( INCLUDED ), 3~6 hours working time depends on different speeds.USB charging by a computer, laptop, power bank, USB Charger, cellphone adapter, car charger, etc. Portable Size: 13*12*16cm (4.7 × 4.7 × 6.3inches), portability, handy, lightweight to carry, or store. Narrow gap, the child’s finger will not enter and touch the fan blades, safe to use.