I was very skeptical before purchasing this antenna. Felt antennas were an outdated technology but I needed something to watch football so I gave this one a shot. It had a large mile radius (40) and it was fairly cheap, compared to other products ($25).
Some reviews I read said they only received a few channels. I live about 35 miles away from the closest television tower. I was able to access 50 channels from one tv. I tried the antenna on another tv (upstairs) and was able to access 90 channels. All the main stations (abc, cbs, fox) were available on both tvs, so I was extremely happy with the purchase. Also a bonus, most of these major networks were in HD, which is typically $10/month more with a regular network provider.
If you purchase this and do not get very many channels, check how far the closest broadcast tower is from you at the link below (or another one, there are plenty out there). If you are within range, try turning the antenna (which is the size of an ipad) in a different direction. It makes quite a difference.
READ (regarding setup): This antenna has no power source (which is wonderful). All you do it plug it into your tv. BUT, after you do this, you must go to your television settings and select the option under setup to set up the antenna. These instructions are provided with the antenna.
Great purchase. Not sure if this is how all antennas work, but this one was great. Would definitely recommend.