"Mini Air Cooling Fan" The main components are: AC motor. Its working principle is: energized coil in a magnetic field by the force of the rotation. Form of energy is transformed: the main electrical energy into mechanical energy, and because the coil has a resistance, so that there is an inevitable part of the electrical energy to be converted into heat. Fans should not be open long, open fan too long, the body will produce discomfort phenomenon. With the large body temperature will reduce the evaporation of sweat and the passage of time, it is easy to cause colds, abdominal pain, diarrhea and other symptoms, should be appropriate to open, it is recommended to open time is about one hour is appropriate. Correct placement is also very important, "Mini Air Cooling Fan" from the human body should not be too close, too close to the hair so that the blood circulation and sweat circulation gap is too large, the nerve center will be out of balance, once the time is too long, the various organs of the body will feel tired, so general discomfort. Best "Mini Air Cooling Fan" placement of about two meters away from the body, making even more gentle wind.