Our Airome diffusers, by Candle Warmers Etc, create a fine mist of water and fragrance with ultrasonic vibrations. They are quiet and generate no heat. Use with Essential Oil Fragrances to create a fragrance mist to help enhance health and mood or with regular fragrance oils to enjoy the fragrance itself. Two mist modes; continuous that runs approximately 3 hours or intermittent that lasts about 6 hours. Our diffusers have 7 LED colors, an Auto Shut-off feature, and 100 ml capacity make it easy to create a soothing environment.