Compared with the traditional desk fan, this bladeless desk fan adopts the latest technology of built-in turbine blades, never worries about hurting fingers, and provides additional safety for children, elder or pets. This feature combines cool water mist with a powerful breeze, delivering a refreshing experience that cools you down and hydrates your skin on hot days. The evaporative cooler comes with a usb cable that compatible with computer, wall chargers and any other USB-enabled power supply. Just plug it into the power supply for the whole day or night working.