I'm not sure if I got a defective one, but I assembled it on my wall, which was easy enough to do, and it worked nicely. After about two weeks, it started to rattle and shake when it was turned on, on both settings, and it so ridiculously loud that I can no longer keep it on during the night, or genuinely at all anymore. Very disappointed with the longevity of this item, but the first two weeks were good. *Also, this is NOT an AC unit, for those looking for one!**EDIT*The company reached out and offered to send me a new one as they suspect my item was damaged in shipping, and they were absolutely right. My device is now fully functional, and so much more quiet than my first experience with it! I’ve been having a lovely experience with it so far, and I e been using it every night!