The Bose SoundTouch 520 Home Theater System offers 5.1-channel surround sound and wireless and wired connectivity options. This system employs Bose ADAPTiQ audio calibration technology and incorporates a main Console unit, four Direct/Reflecting Series II speakers, a center speaker, a wireless Acoustimass module, and a SoundTouch Wireless Adapter. The wireless Acoustimass module is designed to add low bass impact to music and movies, and has a wireless range of up to 30'. The included SoundTouch Wireless Adapter connects to your wireless network via Wi-Fi or Ethernet, and connects to the main Console via the Bose Link connector. This allows you to stream Internet radio, available music services, and your networked music library. With inbuilt Bluetooth you can also pair your Bluetooth-enabled audio sources for wireless music streaming.