... same time ,it can release high density activity ion ,for give you clean air in the room ,let you can enjoy fresh ... Cubic Centimeters place can produce 1200-1400 thousand activity ion. But usually we do air bath like in park, waterfall ,the activity ... , volume(high, mid ,low sleep) swing, timer, nanometer activity ion, humidification and air clean, design for your need in the life. Low ...