Super heavy mist and double sprayer. Colorful Led light changes automatically.(Could turn off manually but couldn't stay on one color ). You could leave it on all night and not worry about refilling. How many hours will it run on one fill? At least 6 hoursThe LED light will flicker if there's no water in the tank,the aroma diffuser stops working automatically. Ultrasonic technology turning the water or fragrance solution into mist.(The mist is room temperature.) Anti-corrosion, material, add your own favorite and personalized oilsLavender: Help sleep comfortableOrange: Provide pleasant moodTea tree: Diminish inflammationPower supply:110V-240VApplications:Beauty salon, SPA, Yoga, Bedroom, Living room, Conference room, Office, Reception center, etc.Functions:Humidify: humidifies the air during summer and winter, refreshes the quality of the air we breathe.Beauty: refreshes skin and can be taken as skin care, keeps skin healthy and moist.Purify: neutralizes static, reduce infection of the skin.Relief: aromatherapy, relieve strain and eases the strain.Decoration: warms the atmosphere by adding or essential oil to the atomizer. Please Note:Don't use it if your room is high humidity in case the super heavy mist condenses into water droplets.Do remember to install the mist mouth on the top of the diffuser in case of leaking water.Oil is NOT included in this package.No brand limit of the essential oil. You could use any water-soluble essential oil as you like.Never use acids, enzymes, or detergents, as this may create poisonous gas or cause malfunction.