BREATHE BETTER, FEEL BETTER. The Bell & Howell® Ultrasonic Color Changing Humidifier adds moisture to the air to help soothe sinus congestion, ease annoying coughs, and even hydrate dry skin while you sleep. Seven color-changing therapeutic light options will help you relax. Ceramic technology filter eliminates bacteria for a soft, healthy mist. Add a few drops of your favorite essential oil for aromatherapy. 1 gallon capacity. 10”Hx9”Diam. ETL listed.