irPort Time Capsule offers you fully automated backup for computers on your Wi-Fi network. Using the Time Machine application in Mac OS X v10.5.7 or later, it’s easy and automatic to back up all the Mac computers on your network to a single AirPort Time Capsule. AirPort Time Capsule is also a fully featured AirPort Extreme Base Station that provides simultaneous dual-band wireless networking using the 802.11ac specification. When you set up your AirPort Time Capsule, it creates two high-speed Wi-Fi networks:  A 2.4 gigahertz (GHz) network for 802.11b, 802.11g, and 802.11n devices, such as iPhone, iPod touch, and older computers  A 5 GHz network for 802.11n, 802.11a, and 802.11ac devices, such as iPhone, iPad, Apple TV, and newer computers Wi-Fi devices automatically join the network that provides the best performance and compatibility, and AirPort Time Capsule shares your broadband Internet connection with computers and devices on your network.