Time Capsule is a revolutionary backup appliance that can automatically back up everything on your Mac—wirelessly. It works with Time Machine in Mac OS X to give you constant, behind-the-scenes protection. Time Capsule is also a full-featured 802.11n Wi-Fi base station with simultaneous dual-band support. It lets you easily share your broadband Internet connection, printer, hard drive, and more. You can even set up a separate Wi-Fi network for your guests.