CE = "Conformité Européenne" and translates from French to English as "European Conformity."

Basically it means the product probably won't hurt you when used as intended, contains nothing environmentally hazardous and doesn't emit enough electromagnetic radiation to cause problems with other electronics.

I don't think the old Dumont brand TV I had in the 60's would have gotten a CE sticker. I had to swat the side of that thing so often I sprained both wrists! To this day when I whack a piece of gear to try to make it work I call it "The Dumont Adjustment." Oddly enough I ran into a guy who used to be a TV cameraman and remembered using a B&W Dumont studio TV camera, and guess what? It periodically required "The Dumont Adjustment" also!