The Perennial Essential Oil Diffuser by Airome features an attractive design of trailing tendrils of vines and flowers. It is finished with a reactive crackle glaze in celadon green. It’s very easy to use: simply remove the decorative ceramic diffuser cover and the plastic lid beneath, add up to 100 ml of water (up to the fill line) and up to five drops of the Essential Oil of your choice, replace the pieces, plug it in, and press the button to turn it on. You may select one of two modes: continuous (lasts approximately 3 hours) or intermittent (lasts approximately 6 hours). The ultra sonic vibrations release a soothing, fine mist of fragrance into your home. LED light filters through the pierced portions of the lamp give added ambiance. Select one of 7 colors, or cycle through them all. The Diffuser will automatically shut off when the water is gone. Approximate size 5″ w x 5″ D x 9.25″ H. Recommended for use with 100% Pure Airome Essential Oils, or you can use the Essential Oil of your choice. The perennial Lotus Essential Oil Diffuser is accented with elegant blossoms from top to bottom and sits on a brown base.