Do you love essential oils? Amazon has a great deal on the Olive Tech Wood Grain Diffuser today! The 400ml large capacity tank can run for 8-12 hours without having to be refilled. If it does run out of water- it automatically shuts off. You can also set time/mist controls. Set the timer for 1-6 hours or continuous mode and also choose strong or weak mist. It also has 7 LED colors that can be cycled through, or set to a continuous color. Whisper quiet technology makes sure it is soothing and barely heard. Perfect for your office, home, bedroom and more!