Ultrasonic Diffuser - Cool MistNEW FEATURE! Light now comes with an on/off switch.These cool mist diffusers are quiet, easy to use and very efficient, requiring only a few drops of essential oil at a time. They have a sleek design, and a light that can be turned on or off (somewhat like a night light). To create an all natural spa-like sanctuary, just add water and a few drops of our therapeutic essential oils or synergistic blends. Turn on the power and select from five different time and output settings. The unit is digitally controlled to shut off whenever the water level is low. The essential oils are not altered by heat, allowing more of the therapeutic benefits to go to you. Safe to use - no heat or glass. Easy to clean - tube free - clog free! Unit comes with power adapter and extra dispersal piece. No risk of overheating and/or explosion since the cool mist is generated by ultrasonic, not a flame or any kind of heat, Once filled the Aroma Diffuser can operate for up to 5 hours. Comes in two colors: Solid Black and Blue/Gray (shown), and we will choose for you, depending on availability. If you have a color preference, please let us know in the comments section when checking out, and we'll do our best.Click on Ultrasonic Diffusers to learn more.We're sorry but the Practitioner Discount does NOT apply to this product.