If radio's your thing, then it's time to check out the crystal-clear reception and improved sound quality that HD Radio technology brings to your favorite AM/FM broadcasts. With this HD Radio tuner and a compatible Alpine stereo, you can tune to participating stations to hear FM that approaches CD quality and AM that's as clear as analog FM.
When you use the tuner with a 2007 Alpine CD receiver, you can tune in alternate channels being broadcast by many of the upgraded radio stations. Radio stations use these extra channels to provide you with different musical or informational content.
Your car's antenna plugs directly into this tuner box, which then connects to the Ai-NET changer port on your 2006-up Alpine stereo. Participating HD Radio stations can also broadcast artist info, song titles, and other text information, and this text will appear on the stereo's display. Dimensions: 7-13/16"W x 1-3/8"H x 7-7/8"D. Warranty: 1 year.