Players toss for those less love, a more balanced overall performance, excellent acoustics of "220V AC Cooling Fan" is a good choice. At present, many manufacturers in order to make their own "220V AC Cooling Fan" product muted effect is more prominent, the bearing type and blade design are under a lot of effort. This flagship mute the effect of "220V AC Cooling Fan", it can be installed in various locations inside the chassis. Regardless of the design method on the blades, ultimately only one purpose: to reduce the shock factor blades rotating at high speed with the air friction, so that the fan and the air contact area airflow more smoothly. The bearing design is the same, only in order to reduce the coefficient of friction between the media to play a muted effect.