The Teardrop collection from Serene House introduces a new take on classic diffuser shapes while maintaining style and sophistication that sets us apart from the competition. The new shape of the Comet Ultrasonic Aromatherapy Diffuser allows for 8hr continuous / 16hr intermittent run time in addition to the 60, 90- and 120-minute timer modes. The 7 rotating or fixed LED lights add ambiance to any room. Simply add water and the essential oil of your choice, then turn it on.