The Ouda diffuser combines the benefits of aromatherapy and chromotherapy using gentle variations of colored light. Ultrasonic diffusion is the most attractive mode of diffusion thanks to the mist produced from them. Essential oils are mixed with water to produce a cold mist, also known to humidify the air. That type of diffusion brings you all the olfactory properties of the essential oils. Diffusion coverage for rooms up to 650 square feet. Variations of 7 LED lights. Silent diffusion for a relaxing atmosphere.