"Micro Cooling Fan" in the use of the best placed next to windows, doors, air circulation to facilitate and improve the cooling effect, reducing power consumption. To maintain normal operation. Note fan routine maintenance. To maintain its good performance, avoid fan deformation, vibration occurs, which to some extent, in favor of energy saving. Noise is increasingly focused on a lot of players, for the fans who are the noise from the fan. A little bit of difference between the fan and will not cause a big impact, but to know that in fact the tiny vacuum region may be the biggest source of noise, many manufacturers are in the upper and lower blades no small effort, mainly through some fancy small reformed to achieve better mute diversion effect.