AirPort Express delivers unprecedented wireless freedom in a highly portable unit that fits in the palm of your hand. Unwire your home for everything from playing your iTunes music through stereo speakers to sharing a single broadband Internet connection and a USB printer to extending your current wireless network.

Specifications
 

Wireless protocol
802.11g 
Wireless data rates
Up to 54 Mbps for AirPort Extreme-enabled and other Wi-Fi Certified 802.11g computers (data rate depends on environment)
Up to 11 Mbps for AirPort-enabled and other Wi-Fi 802.11b-enabled computers (data rate depends on environment) 
Range
50-foot range from the base station in typical use at 54 Mbps data rate (range depends on building construction) 
150-foot range from the base station in typical use at 11 Mbps data rate (range depends on building construction) 
Frequency band
2.4GHz 
Radio output power
15dBm 
Size and weight
Dimensions: 3.7 inches (94.01mm) x 2.95 inches (75.00mm) x 1.12 inches (28.5mm) 
Weight: 6.7 ounces (189 grams) 
Compatibility
Wi-Fi Certified for 802.11b and 802.11g interoperability  
Mac computers and Windows-based PCs 
NAT, DHCP, FTP, PPPoE, VPN Passthrough (IPSec, PPTP and L2TP), PPP client and server (AirPort Extreme with modem only), QuickTime Streaming, DNS Proxy, SNMP 
America Online  
Cisco LEAP client support to connect to Cisco LEAP access points. 
Interfaces
10/100BASE-T Ethernet WAN port (RJ-45 connector) for connecting a DSL or cable modem 
3.5mm mini-Audio jack for analog or optical digital sound 
USB port for connecting a USB printer  
Apple power adapter 
Security
Wi-Fi Protected Access (WPA)  
Wireless security (WEP) configurable for 40-bit and 128-bit encryption 
MAC address filtering 
NAT firewall 
Support for RADIUS authentication 
802.1X, PEAP, LEAP, TTLS, TLS