A complete guide to selecting a Digital Radio
"A digital-radio is designed to pick up the new digitally transmitted radio stations."
A digital radio is new design of radio that receives a digital signal instead of the of an analog radio signal.
The radio channel is streamed as a sequence of binary data, much like music on a CD. This data is translated into sounds and is much clearer than an analog signal.
Selecting a digital-radio is often based on price. Most models will receive all new digital channels so it comes down to other features. Size, Quality, portability etc.