I like this a lot [SEP] I have gone through many travel magnifying mirrors.  This one has the best design so far.  the only thing is that the on/off switch is stamped on, no button, so sometimes it goes off when pressed other times, you have to press it a couple times, no button like I said so guessing from the symbol where it is.  I think I will not use the battery option, just the USB option, therefore that is how it will go on and off, when I unplug.  That is a very nice feature to have.