100 Ml Ultrasonic Aroma Essential Oil Diffuser Air Humidifier with 4 Timer Settings and 7 Color Changes Use ultrasonic waves to work with water and natural essential oil in the tank, spray mist for aromatherapy, humidifying, purifying. Natural essential oil make the healthy and relieve the stress. Romantic color light and mist bring happy feeling. Enjoy the life. LED light: 7 Color Changing lamps for your choice, independent light-control,4 timer settings: 180 minutes, 120 minutes, 60 minutes and 30 minutes Water tank capacity: 100ml, advanced ultrasonic technology:2.4MHZ Monitor the shortage of water automatically and ensure the safety.