Apple M8881LL/A AirPort Extreme Card Exchange files or play multiplayer games at data transfer rates of up to 54 Mbps Compatible with the industry-standard 802.11b wireless networking protocol Range of up to 50 feet at 54 Mbps and up to 150 feet at 11 Mbps Join any of the thousands of Wi-Fi certified 802.11b wireless "hot spots" that are currently running in coffeehouses, bookstores, and airports 128-bit WEP encryption for secure connections