The same specifications of "Micro Cooling Fan" product produced by each manufacturer and its quality has a different life, mainly from differences in each one of the structural design, electrical performance design, material selection and process control, etc. are different; second is pros and cons of user level installation location selection and use of environmental conditions such as integrated to decide. To achieve the desired quality and service life requirements, "Micro Cooling Fan" in the selection of the fan sometimes the user does not depend on the manufacturer to provide a set of data it can guarantee its quality and life is so simple, user to their own requirements and for Installation of the fan, use, environment and other informed manufacturers, manufacturers make a comprehensive assessment of its only the selection, design and material selection electrical performance specifications "Micro Cooling Fan" and other structures to achieve this condition requires otherwise, all will not be realized.