StoneTech High Quality Portable USB Tower Fan Air Cooling Fan Mini Bladeless Fan Table Laptop Desktop(Black) It is suitable for connection to the USB interface of a computer An air current is generated due to the rotary motion of the rotor Besides, it has the function of refrigeration, which is a device your office or study cant do without, especailly when summer is coming This USB Tower Fan adopts ABS shell and tower-style appearance design, which is smart, portable and fashionable Applicable for: Computer USB electric appliances