Light Source Type LED Color Green Brand Serene House Material Glass Coverage 450 square_feet, 150 square_feet Cool mist diffuser Recommended room sizes 150 sq. ft. to 450 sq. ft. Automatic shut off when empty 8 hr continuous/16 hr intermittent modes Plug cord into wall Product Description .handmade porcelain and glass. generates a mist from pure essential oils to reduce the dryness of indoor air. Simply add water and the essential oil of your choice then turn on. OILS NOT INCLUDED Product Dimensions 4.5 x 4.5 x 7.5 inches Item Weight 2.04 pounds