You can get HD rabbit ears and get a few local stations in HD - or you can pay $10-15 a box per month and get full HD with a lot of stations - All HD stations with all providers you must have the box - no exceptions. In my view, it is best to rent these boxes instead of buying, I have replaced 2 boxes since within a year & 1/2 - when you rent, you just turn in and get another. If you want to purchase - most of the time they range from$300-#400. It is best to check with COX to see which ones can be used and where to purchase. GOOD LUCK!