"Mini Air Cooling Fan" appearance of quality requirements modeling, line, tone nice. Plating requires smooth, shiny, no yellow, rust, peeling and waterlines phenomenon. Film requires hard, smooth, no bubbles, scratches without paint off, open at the end, hanging paint or paint mixed different phenomenon. Garnish should be no damage, front and rear grille fit tightly, no distortion, grille wire sealing off the joints loose and so on. "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. Transformed forms of energy are: electrical energy into mechanical energy major, and because the coil has resistance, "Mini Air Cooling Fan" so inevitably there is some electrical energy to be converted into heat.