I don’t see any cord coming out from the lamp, so I am guessing it is USB powered, not by “wall wart” power adapter, but with a snadard USB cable that we provide ourselves? I’m not knocking Woot! or Amazon either except that one would think by now that with the billions of $$ Amazon takes in every year, they could hire some people to make sure the manufacturer’s info at least covers power / operating of electronics devices. I mean it does make a difference if I need an AC outlet available for this, or another USB port, or if it is a USB rechargeable device…?