The Hunter Aromatic LED Ultrasonic Humidifier (XJ-520) is a personal humidifier that is also able to diffuse essential oils – just add a few drops to the water bottle or the built-in reservoir and enjoy the soothing effects almost instantly. This aromatic humidifier has all-electronic controls and 3 intensity levels to choose from. It also functions as a color-changing LED night-light, making it perfect for kids and bedside use. Ultrasonic technology allows the unit to operate at a whisper and there are never any filters or wicks to replace. Best of all, the unit shuts off automatically when the water bottle is empty, so you don’t have to worry about forgetting to turn it off. Please do not use water bottles that exceed 20 fluid ounces.