This modern aromatherapy diffuser combines all the benefits of ultrasonic aroma technology into a gentle, quiet mist that fills the entire room. When turned on, the ultrasonic diffuser vibrates water molecules at a specific frequency, causing the water to heat up and release a fine mist containing tiny bubbles. The pure essential oil warms in the water reservoir, and as the mist is released, the ultrasonic waves burst the bubbles, creating an incredibly delicate mist. Capacity: 100 ml.