The MPEX300WN2X2 Mini PCI Express Wireless N Card lets you add high-speed 802.11n network connectivity to your laptop or small form factor system, with support for data transfer rates up to 300 Mbps. For efficient wireless communication, the card uses a 2T2R (2 Transmitter, 2 Receiver) Multiple Input/ Multiple Output design over the 2.4 G Hz frequency. MIMO antenna configurations employ multiple signal paths for greater bandwidth, fewer lost packets & greater reception, even under conditions of interference. The 300 Mbps wireless N adapter offers the necessary speeds for demanding network applications such as streaming video, Vo IP & network backups, while also offering backward compatibility with 802.11b/g networks (11/54 Mbps) to connect to older Wi Fi routers as needed. Using a half-height mini PCI express (Half Mini Card) form factor, this adapter is designed for use in the latest notebooks, small form factor computers (e.g. Mini-ITX), or custom embedded solutions where standard PCIe cards would not fit. Backed by a Star Tech.com 2-year warranty & free lifetime technical support. The Star Tech.com Advantage Fast & reliable wireless network connectivity with Wireless N compliance Connect to older wireless networks with 802.11b & 802.11g backward compatibility Install into small form factor or custom embedded systems with a Half height Mini PCI Express design