AirPort Extreme 802.11n (4th Generation) used

AirPort Extreme 802.11n (4th Generation) used AirPort Extreme 802.11n (4th Generation) Wireless protocols IEEE 802.11a/b/g/n Frequency bands 2.4GHz and 5GHz simultaneously Radio output power 20 dBm (nominal) Compatibility Interoperable with Wi-Fi Certified 802.11a, 802.11b, 802.11g, or 802.11n enabled Mac computers, iPad, iPhone, iPod touch, and Windows-based PCs NAT, DHCP, PPPoE, VPN Passthrough (IPSec, PPTP, and L2TP), DNS Proxy, SNMP, IPv6 (6to4 and manual tunnels) Included in the box AirPort Extreme Base Station Power supply with cord Printed documentation Security Wi-Fi Protected Access™ (WPA/WPA2)2 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, FAST Time-based access control Interfaces One Gigabit Ethernet WAN port for connecting a DSL or cable modem Three Gigabit Ethernet LAN ports for connecting computers or network devices USB 2.0 port for connecting a USB printer or USB external hard drive