Many people "Tiny Cooling Fan" are not very understanding, in fact, the operation of DC fan with the heat of the case is changed to a slower speed operation, the fan will have less noise and consumes less energy. In most of the design requirements, after "Tiny Cooling Fan" operating speed is usually lower than the air temperature a few hours maximum design temperature values. Under normal circumstances, low speed cooling fan can be enough to complete its work. The temperature changes slowly when the fan, the fan speed changes are slow, not suddenly change "Tiny Cooling Fan" speed and noise. The reaction time depends mainly on the length of the sensor of its thermally-induced sensitivity.