Ultrasonic transducer vibrates at a steady and high frequency that makes the molecules of water and the essential oils so tiny that it is easily absorbed by the body. This creates the negative ions and moisturizes air & skin allowing you to enjoy the aromatherapy effectively.Pursonic Essential Oil Diffuser brings the all-natural healing power of aromatherapy to your home or office with a stylish design that complements any decor. Doubling as a cool mist humidifier, Pursonic can be used with or without essential oil to moisturize the dry air during any season. When oils are used, Pursonic’ s safe, non-heating diffusion maintains the integrity of your essential oils so you can enjoy their full aroma therapeutic benefits.