The sixth generation Airport Extreme Base Station 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 three-stream 802.11ac technology, the Airport Extreme Base Station can reach data rates of up to 1.3Gbps, which is triple the 802.11n standard. 802.11ac Wi-Fi also provides double the channel bandwidth with 80MHz-wide channels providing more room for data to flow faster. If you're using a 802.11a/b/g/n Wi-Fi device, Airport Extreme can still optimize the connection for those Wi-Fi standards as well.
Apple has redesigned the Airport Extreme to be taller with antennas located at the top of the device. Apple also increased the number of antennas to six, three for 2.4GHz and three for 5GHz. The vertical redesign of the AirPort Extreme also contributes to a smaller footprint and more desk space.
With AirPort Extreme, getting your new Wi‑Fi network up and running is quick and easy. That's because a setup assistant is built into iOS and into AirPort Utility for OS X. As soon as you plug in your AirPort Extreme and connect it to your DSL or cable modem, you can follow the simple instructions on your Mac or iOS device. There are no complicated steps to follow and no obscure terminology to learn. The setup assistant does all the work, so you don't have to.