Use the T-Zone Health Ultrasonic Diffuser to scent your environment with just a few drops of any essential oil. Ultrasonic diffusers use sound to vibrate the water, which create a cool scented mist. Each feature a light that rotates through 7 different shades. Light can also be paused on any one particular colour. Option of either intermittent or continuous mist. 1 hour, 3 hour, or 6 hour timers u to 18 hours of mist. Automatically shuts off when empty. 300 ml capacity/20-30 ml mist per hour. Ultra quiet.