Large capacity - 300ml, work through the night. Safety - Diffuser will be auto shut off when waterless, to protect the diffuser from being burned out. Quiet - Our diffusers are with quiet ultrasonic qualities, allows you to have a peaceful aromatic experience every time. Mist Flow - Nanoscale water drops with essential oil fill up your room, purify the air and make your breath better in a peaceful surrounding. Versatility - Drop your favorite essential oils for aromatherapy, make your dreams sweet , body relaxed and stress relieved, also help you fight allergy, cold or flu symptoms. Night lights - The light can be turned off, set to fade gradually or fixed color. The mist and the light are set on separately. You can choose one or the other, or both function at the same time.