"Tiny Cooling Fan" can around that part of the body temperature slightly higher quickly blown away, put on the ambient air temperature, of course, feel a little cooler. If the temperature is higher than the lower body surface temperature, no sweat with the fan case is useless, it will be hotter. In this case "Tiny Cooling Fan" the role, is to increase the flow of air to promote evaporation of sweat, it will play a little cooling effect. "Tiny Cooling Fan" the fan is turn it sideways, it turned quickly, the air will rotate the plane of rotation perpendicular to the plane encountered by pushing out at the same time of course, fan behind the air will be filled immediately, so they formed The flow of air.