Benefits and Features Crafted porcelain ceramic cover design made from natural materials High diffusion mode runs up to four hours Three timer options for automatic shutoff after one, two, or three hours LED light gives a translucent glow and dimmer options that can run independent of diffuser function Compact, space-saving size that fits easily on tabletops, in bathrooms, and in offices Essential oil diffusion coverage for medium-sized rooms of up to 375 square feet