Put your iPod at the heart of your home entertainment system! Xdock features built-in X-Fi Xtreme Fidelity® audio technology that restores detail and vibrance to compressed music like MP3s and iTunes during playback, so your music sounds richer and fuller. X-Fi also expands plain stereo music and videos into a full surround sound experience. Plus, Xdock sends the music from your iPod to X-Fi Wireless Receivers that you can place in other rooms of your home (X-Fi Wireless Receivers sold separately).