Alion 500ml Aromatherapy Diffuser Ultrasonic Atomizer Air Aroma Humidifier LED 7-Color Changing Night Light LM-168C Ultrasonic, air humidifier, aroma diffuser, fragrance light Last 10 hours with 500 ml capacity Three mode of mist and light available Automatic stop without water, safe and reliable Drop in 1-2 drops oil, fragant refresh and enhance memory