Our Ultrasonic diffusers are among the most elegant yet functional aromatic diffusers we’ve discovered, anywhere. This diffuser will fill large spaces with your favorite aromas, they look absolutely stunning – plus they’re extremely easy to use. The unit does have a built in timer for ease of use and it will shut off if it runs out of water. We recommend using 3-5 drops of essential oil per 100ml of water. The unit does produce a mist; do not let the mist blow directly onto furniture, clothing or walls and keep on a stable flat surface.