USB plug in makes this nice, it does have the adaptor to it, however, I wanted something that could be usb used. I have a small bathroom and the room gets the hottest in the house with the heat. I sneeze a lot due to that, so really just wanted something to keep the air in there more purified and this does it as well as lighting up the night with the different colors. It is naturally cut, while it is smooth, there are natural flaws to it also. The wooden base keeps it stable, it sits on a mirror at night, so it really reflects the light in the room. Less charge of electric going out using this in there instead of the regular night at night. All you need to do is plug it in, there is no off/on switch to it. Colorful and attractive in its small size. I think it does what I wanted it to do.