2-Speed Ultra-quiet Mini USB Desk Office Home Work Fan

Rotation Way: Up & DownUsage: HomeType: Cooling OnlyMaterial: PlasticControlling Mode: Mechanical Timer ControlWater-shortage Power-off Protection: NoWind Type: Natural WindSize: <1050MMMax. Power: <20WPower Source: USBReverse Rotating Function: YesPower (W): 5wTank Capacity: <3LApplication: 10-15㎡Fan Speed: Second GearVoltage (V): DC 5V Portable: little body and light weight make it possible to handheld or carry it to wherever you go Ultra-quiet: the motors works very quietly so that you can take it to some public places and won't disturb others Double blades: two fan blades rotate in opposite directions driven by different motors to produce strong blow and low noise