Diffuses the aroma by Ultrasonic oscillation without heating or burning the essential oil, which is safe and helps maintain the original effects of the essential oils.The Ultrasonic water-oxygen diffuse produces a frequency of oscillation at 2.5 million vibration frequencies per second. Makes the molecule of water and essential oil tiny so that it is easily absorbed by our body. Provides anions, helps bring home the fresh atmosphere of nature. Combines the effects of aqua-therapy and aroma-therapy. Can be used as a humidifier. Purifies the air and provides a healthy and soothing environment. User-friendly, with various settings to meet individual needs. Unique venting design, prevents fogging the table surface nearby. Designed by TOAST with a graceful styling, high quality and an excellent performance.