This is the Apple AirPort Extreme 802.11n Wireless Router model MD031LL/A. The sleek, easy-to-use AirPort Extreme Base Station with simultaneous dual-band support is the perfect wireless access point for home, school or small business. It offers fast, 802.11n Wi-Fi access for Mac computers, PCs and Wi-Fi devices such as iPhone, iPod touch and Apple TV. The Apple Airport Extreme is based on the Wireless-N (IEEE 802.11n) specification and it uses multiple-input multiple-output (MIMO) to transmit multiple data streams simultaneously--resulting in data transfer speeds up to five times those of 802.11g wireless networks while also providing up to twice the range. It's compatible with Mac computers, PCs, and wireless devices such as iPad, iPhone, and iPod touch that use 802.11a, 802.11b, or 802.11g technologies.