About AirPort Extreme
Use AirPort Extreme in your Mac Pro to join a wireless network, or share your network connection wirelessly with another computer. You can even stream music from iTunes to your stereo using an AirPort Express base station.
AirPort Extreme is based on an IEEE 802.11n draft specification and offers up to five times the performance and twice the range of 802.11g wireless networks. AirPort Extreme allows your AirPort Extreme-enabled Mac Pro to communicate with local AirPort Extreme networks or with other Wi-Fi certified 802.11a, 802.11b, or 802.11g networks, including earlier versions of Apple's AirPort Extreme Base Station and the AirPort Express Base Station.
Wireless Internet access requires a wireless-enabled computer, a base station or other access point, and Internet access (fees may apply). Some ISPs are not currently compatible with AirPort and AirPort Extreme.
Performance is based on a comparison with Apple's 802.11g products. Comparison assumes AirPort Extreme network with 802.11n-enabled computer. Speed and range will be less if an 802.11a/b/g product joins the network. Accessing the wireless network requires an AirPort- or AirPort Extreme-enabled computer or other Wi-Fi Certified 802.11a/b/g-enabled computer. Actual performance will vary based on range, connection rate, site conditions, size of network, and other factors. Range will vary with site conditions.