"Waterproof Cooling Fan" has designed an ordinary wind, natural wind, sleeping wind three kinds of functions, "Waterproof Cooling Fan" The wind is constant, there will be no large do not small; natural wind mainly for large wind nature Do not small, can be simulated periodically from strong to weak control circuit, and then control the motor speed will not fast not to slow; the principle of sleep with natural wind, like the wind, is also used by the strong to weak control circuit to control the motor Rotating speed. Reminder: consumers use please reasonable selection they need "Waterproof Cooling Fan". Appearance, lines, color nice; plating smooth, shiny, no yellow, rust, peeling and waterlines phenomenon; film hard, smooth, no bubbles, scratches without paint off, open at the end, hanging paint or different paint mixed phenomenon; decorative pieces without damage, front and rear grille fit tightly, no distortion, no solder wire nets loose sealing off and so on.