The 2tb airport time capsule from apple features simultaneous dual-band 802.11ac wi-fi support. That means it transmits at both the 2.4ghz and 5ghz frequencies at the same time. So no matter which band your wireless devices use, they’ll automatically connect to the best available band for the fastest possible performance.
With the airport time capsule, you get a superfast wi‑fi base station and an easy-to-use backup device all in one. It works with a time machine in mac os x to back up your Mac automatically and wirelessly. Music, photos, videos, documents and even your apps and os x settings are saved. The airport time capsule stores it all with its 2tb of storage space