"220V Cooling Fan" application in our lives is very wide, and with the increase in living standards improve and the demand for products, competition cooling fan industry is growing. With the application and environmental temperature changes, sometimes it requires a different fan speed to meet demand. Some vendors specially designed adjustable fan speed "220V Cooling Fan", manual and automatic modes. Manual is designed to allow users to use low speed in the winter to obtain a low noise, high speed get good cooling effect in the summer. "220V Cooling Fan" the speed is not necessarily related to its quality, which is I believe we are unexpectedly it! In fact, this is a misunderstanding, many people think, the fan speed unhappy, then the quality of the fan's certainly not how, In fact, we can see that is not the case.