The sculpted frosted glass cover and rounded base will add a modern touch to any room. The Comet Diffuser runs up to 8-hours continuously or up to 16-hours intermittently. Customize your relaxation with the 60, 90, 120-minute timer and 7 LED lights. The 7 LED lights can rotate or be fixed to one color. To use, add water and the essential oil of your choice, turn it on, and let the cool mist relax and recharge you.