This ultrasonic technology, combined with water and a diffuser blend, produces negative ions and aromas that elevate your well being by dispersing essential oil molecules into the air. By breaking up the mixture of water and essential oil into millions of micro-particles, a stream of air diffuses activated ingredients of the blended essential oil, which can be easily absorbed by the body and freshen the room for longer. Using aromatherapy principles, your body will be gradual relax, and your skin will be moisturized at the same time. Healthy & Environmental-Friendly - No burning, no heating, all essential oils use is maximized!