AC adapter.
) Audio is played through its 3 speaker while the clock radio displays Radio Data System information (when available) such as call sign, song title, and artist. This is the high-definition clock radio that provides crystal clear audio. Unlike lesser models that only receive analog signals, this radio harnesses HD technology to discover HD “multi-casts” that local stations may broadcast in addition to their base frequency and plays them all with superior clarity that makes AM stations sound like FM and FM sound like CDs.