Piece of Junk and has made in China on the boxes...figures! All they do is amplify all sounds, no clarity improvement at all. With them in, a can opener sounds like a skill saw. Accomplish the same thing just by turning up the TV volume and save 90 bucks. Then the company stonewalled me about a refund until I brought AMEX into the argument and gee, all of a sudden I got my refund. Looked on EBAY and the same units from China are about 10 bucks.
Save your money and see a Dr of Audiology if you really want hearing improvement or if you can't afford to do that, buy and ear trumpet...same...