TUA-T550HD - Alpine HD Radio Tuner Module Interface
Range is extremely limited compared to regular FM.Also when the signal srenght gets weak you hear the same line in a song or a commercial over and over again.You may be with a couple miles of the transmitter site, but maybe you turn a corner or cross an overpass; it could be almost anything that wil cause the tuner to repeat the same line repeatedly. Save your money, don't get HD until there are some serious improvements.