The mpex300wn2x2 mini pci express wireless n card lets you add high speed 80211n network connectivity to your laptop or small form factor system with support for data transfer rates up to 300mbps for efficient wireless communication the card uses a 2t2r 2 transmitter 2 receiver multiple inputmultiple output design over the 24ghz frequency mimo antenna configurations employ multiple signal paths for greater bandwidth fewer lost packets and greater reception even under conditions of in