1)ultrasonic aroma diffuser 2)0.3nm, absorbable, no sweat 3)adjustable mist, 500ml ... auto off lack of water 500ML Ultrasonic 2.4MHZ 20-25db for Essential oil ultrasonic aroma diffuser SpecificationModel No:LM-168Essential oil:YesUltrasonic ... :Power supply,Measured cup, User manualAdwantage:Our Aroma diffuser is designed for Essential Oil, Ultrasonic technoloty,which advantage is:1. Mute: 30 ...