... :100-220V 3.running time: 21-30 square meter 4.noise:<35db(a) Beautiful room air ultrasonic humidifier mini Advantages: ... 1.Letter Patents2.Certificates(Unit): CE,ROSH etc. 3.Certificates(Adaptor): CE,FCC ... : Home,Beauty salon,SPA,Yoga,Office,Corridor,Pet room,Baby’s room,Hotel, Hospital,etc.Features / Description:1.Ultrasonic technology2 ...