"220V Cooling Fan" also called air double machine, it can produce natural continuous cool, because no leaves or dust does not cover injuries to curious children's fingers. Even more amazing is its peculiar shape, the appearance of both flow lines and refreshing. "220V Cooling Fan" inspired air blade hand dryer. Hand dryer is the principle of forcing air through a small opening "brush" dry hands in water, air double machine is to allow air from a 1.3 mm wide incision rotating around the ring blew out. Because air is forced to blow out of the circle, the amount of air can be increased to 15 times, "220V Cooling Fan" can be increased to 35 km per hour.