Featuresr dual motor and double fan settings 5 blade front wing 7 blade rear wing rotating in opposite directions driven by different motors to produce cooling breeze r usb interface can be used with pcs directly with wall plugs via ac charger and with any usb devices such as power banks it makes the fan can be placed anywhere if necessary r minimal design low noise r smart control system simply touch the fan body case to swith the different positions of blow strength r attac