Sony XT-100HD HD Radio tuner for Sony car stereos XT100HD Love local radio? Then it's time to check out the crystal-clear reception and high-quality sound that HD Radio technology can bring to all your favorite AM/FM broadcasts. Just connect this external HD Radio tuner to your compatible Sony stereo and start enjoying AM that's as clear as FM, along with FM that's almost CD quality, on stations that have upgraded to the HD Radio format. Participating HD Radio stations can also broadcast text information (artist info, song titles, etc.), and this text will appear on the stereo's display. Multicasting  Many of the upgraded radio stations broadcast one or more additional channels of programming along with their normal radio content. Radio stations use these extra channels to provide you with different musical or informational content. The XT-100HD lets you tune in these alternate channels. Your car's antenna plugs directly into this tuner box, which then connects to the stereo's CD changer port. A pass-through connection lets you connect another piece of Sony stereo gear, too. Warranty: 1 year.