"Tiny Cooling Fan" of the main indicators are: air flow: how many cubic meters of air per minute to produce the fan work, the unit is M3min or CFM; pressure: the pressure generated when the fan operation, the unit is mmH2O; "Tiny Cooling Fan"noise: the sound produced when the fan work, mainly wind noise, electromagnetic voice, bearing noise. Units of db-A; life: Fan does not work, the speed of less than 85% of rated speed is considered its life expires. Fans generally refers to the average life expectancy life; "Tiny Cooling Fan" Ambient temperature: refers to the temperature where the fan work when the ambient temperature has a great influence on the life of the fan. High temperatures shorten the life of the fan, low temperature bearing grease does not work.