The advantage lies in: By guiding the airflow axially, the heat dissipation efficiency is relatively high; Common DC brushless motor drive, energy-saving and long service life; Bearings are available in various types such as ball bearings and oil-impregnated bearings. Ball bearings are durable, while oil-impregnated bearings are quiet. It is applied to the heat dissipation of devices such as computers, servers and electrical appliances.