Small size and portable, it can be used in home, office and many other places Removes unfavorable odors & food smells, increases the humidity of air and reduces dust and bacteria Just open the cover, add water into the container, then connect USB cable with your computer, very easy operation You can also drop the aroma oil into the water to make the air fresh 7 colors of the lights will automatically change to create a romantic atmosphere. With LED light, it can work as a night light.