The 3D Ultrasonic Aromatherapy Diffuser by Sharper Image creates scented mist and relaxing visuals for your home and well being. Simply add water and a few drops of your favorite essential oil. The ultrasonic vibrations turn the water into a superfine mist that freshens the room. Built-in LEDs create a sparkling color effect on the glass cover. Mist and lights can operate together or separately. Essential oils available at SharperImage.com.