USB connection. > & nbsp; or & nbsp; intermittent & nbsp; or volatile oil can be added. > LED light mini -environment room air moisturizer and portable steam machine is a moisturizing treatment that helps prevent irritation in various parts of the body by giving moisture to prevent dry dryness. It provides effective treatment especially for skin, nose, lips and throat dryness. In addition, moisturizers have proven to help alleviate symptoms caused by colds, redness and viruses. This product can be used with USB connection and comes with an internal romantic light. It also contains a filter. Provides functionally continuous or intermittent spraying. Suitable for use of office, car or home. You can also add a tank perfume or essential oil to the room to spread a relaxing odor. This product does not affect sleep quality and does not wet the desktop because it is loud.