... It has multi-function such as air anion ,air humidifition and air purifition9)0.5 to 7.5 ... , longer life15)centrifugal wind wheel and whirlpool- air duct system to give you a cool air16) ... and undesirable odor3) Cross flow wind way, large air delivery 4)Water-sprayed humidifying, collect dust and ... undesirable odor5) Cross flow wind way, large air delivery6)Natural wind, sleep wind and normal wind ...