"Waterproof Cooling Fan" is mainly used for forced air convection only. With fans after a long time, the following blades are easily stained with a lot of dust. This is the fan at work, due to the friction between the blade and the air leaving the fan belt electrostatic charged objects attract small objects nature of light, which can absorb small indoor floating dust caused. Simple structure, easy operation, low price of its characteristics, generally only have to change the wind speed with two functions; the latter to complex features, luxury features beautiful shape. Consumers can be determined for the purpose of trade-offs based on the premise of practicality or utility, decorative, luxurious both.