... of a large number of negative ions to freshen the air and care health.17)Removable type of filtration mesh , ... high speed.19)Energy saving ,had multi-function as air anion ,air humidifier and air purifier ,no fluorine pollution,friendly to the environment. ... speed.7.Energy saving ,had multi-function as air anion ,air humidifier and air purifier ,no fluorine pollution,friendly to the environment. ...