Pros: This external TV tuner worked well with my 50in. TV except for a snapping sound in the speakers that started after about a month of operation. It sounded like a short jumping from the box to the TV. This problem could be solved by setting the volume on the Box full on and controlling the sound level on the TV remote. The box received HD over the antenna and gave a very sharp picture. 1080i

Cons: The box failed to turn on about 18 months later and I cannot get any information on what might be wrong with it. Kworld doesn't have a Q,A on this product and their on line consulting doesn't work. Not a very good company to try to deal with!