Digital radio receivers lock onto the signals. In fact, they find the strongest signal and then lock onto this. People really like using them because they are so high-tech and can pick up signals so well. The prices for these types of digital radio receivers vary depending on the manufacturer, sales and what area of the country you live in. They are state of the art and really good to use when picking up radio signals in your area. Some people even compare them to miniature computers for the radio.