The selected "Tiny Cooling Fan" must be able to provide sufficient amount of exhaust (speed), under the high temperatures of the hot air inside the cooling device; when the temperature is relatively low and less when hot air is doing the opposite of work . Secondly, the "Tiny Cooling Fan" sensor installation should pay attention to the location of choice, the sensor is put in place, try to make the sensor can be directly clamped surface to be cooled. In "Tiny Cooling Fan" operation, a temperature-controlled cooling fan will run at a faster pace if the thermistor feel higher temperatures; and at lower temperatures, it will operate at low speed; in these higher and lower middle, cooling fan speed will hardly due to temperature change.