... 5)CE and RoHS approval Aroma Diffuser, Ultrasonic Aroma Diffuser & Humidifier, Auto Aroma Diffuser, Mini Aroma DiffuserTechnical Specifications: • Rated Voltage: ... added according to personal favor.5.Ultrasonic vibration produce a cold mist can 100% diffuse and keep the active ingredients ... . The Diffuser also acts as an Air Purifier, Ionizer, Humidifier and a Mini Night Lamp. 3-4 hours operation time ...