Those "conductive" tweezer devices (where it tweezes the hair and says it "sends electricity" down into the shaft) are garbage. They've been selling them since the 90s and don't do anything at all.
The only device I know of that got FDA approved is the Tria laser. But don't waste your money, just go to a professional laser clinic. It's expensive but it works and it's permanent. Electrolysis works too of course but it's much, much, much slower than laser, so it's only good if your hair is too light/blond/white (laser doesn't work for that).
