... used. 3.USB interfaces. Detailed Product Description Type Ultrasonic HumidifierInstallation Tabletop/PortableCertification CB,CE,CSA,EMC,EMF,GS ... Black,Green,Pink,Purple,YellowFunction Ultrasonic Wave Function Ultrasonic Humidifier:1.With Essential Oils;2.Ultrasonic Wave;3.Portable& Car&Household ... suitable for room size 40-50 aqure meters.accssories humidifier ac/dc adapter... Update Date:2011-12-1 ...