Apple AirPort Express Base Station with 802.11n and AirTunes (MB321LL/A)

Now with blazing 802.11n, the affordable AirPort Express is powerful enough to run a home Wi-Fi network, yet small enough to take on the road.

Music Sharing
Youve put together an extensive digital music collection in iTunes and arranged it into playlists to suit your every mood. Now you want to enjoy it in your living room on your home stereo, not just in the den, where your computer sits. You can, thanks to AirPort Express with AirTunes.

Plug. Play. Rock out.
AirTunes takes the music from the iTunes library on your computer and sends it wirelessly to any stereo or speakers in your home. All you have to do is plug an AirPort Express into an electrical outlet near those speakers, then connect them with an audio cable.

In iTunes, you can choose which speakers you want your music to play on — in your den, living room, or bedroom. If you have more than one AirPort Express connected to speakers, you can play the same music on all your speakers at the same time to create a whole-house musical experience.

Party Central.
If you already have a wireless network in place, you can use AirPort Express to add music to its capabilities. Lets say, for example, you have AirPort Extreme set up in your den. Theres no need to scrap this setup and create a whole new network. Simply connect AirPort Express to your stereo in your favorite music room and plug it into an electrical outlet — it wirelessly links to your existing network, letting you play your music in your room of choice without moving anything or connecting anything else.