Apple's Airport Extreme router, model: A1521 Ultrafast 802.11ac Wi-Fi powerful beamforming antenna array, up to 3x faster Wi-Fi and a stronger, clearer signal. transmits at both the 2.4GHz and 5GHz frequencies at the same time Six antennas, three for the 2.4GHz band and three for the 5GHz band. Easy setup for iOS and OS X, Connect your DSL or cable modem to AirPort Time Capsule and use the built-in setup assistant to create your new wireless network in just a few taps from your iPhone, iPad, or iPod touch. If you're using a Mac, use the built-in AirPort Utility. Setup is just as fast and just as easy. Share your hard drive or printer through the USB port Compatibility and security: Any Wi-Fi device you have will work with AirPort Time Capsule. compatible with devices using the 802.11a, 802.11b, 802.11g, 802.11n, and 802.11ac specifications built-in firewall