Xdock for iPod With X-Fi Crystalizer restore detail and vibrance to compressed music such as MP3s and iTunes Surround sound from stereo music, movies and TV shows with X-Fi CMSS-3D. Digital DTS audio connection to home theater receivers. Send DTS surround sound to your home theater system through a single optical cable. Built-in wireless music streaming technology gets music into more rooms of your house easy. Remote control for music and movie playback. Play, pause and skip through all your music and movies with the wireless remote control.