TP-link Wireless PCI-express tl-wn881ND TP-link  Wireless N PCI Express 2.0(x1) Adapter TL-WN881ND Wireless N speed up to 300Mbps makes it ideal for video streaming, online gaming and Internet calls MIMO technology with stronger signal penetration strength, wider wireless coverage, providing better performance and stability Easily setup a highly secured wireless link with WPS  (Wi Fi Protected Setup ) Wireless PCI Express Adapter TL-WN881ND allows you to connect a desktop computer to a wireless network and access high-speed Internet connection. It provides wireless speed up to 300Mbps, which is beneficial for the online gaming or even HD video streaming. Easy Setup A friendly user interface Utility on a CD for simple installation. Advanced Security WPA/WPA2 encryption standards ensure wireless connection’s safety. Operating System Supports Windows, Linux HARDWARE FEATURES Interface PCI Express(x1) Dimensions ( W x D x H ) 4.8 x 3.1 x 0.8in. (120.8 x 78.5 x 21.5mm) Antenna Type Detachable Omni Directional ( RP SMA ) Antenna Gain 2 dBi WIRELESS FEATURES Wireless Standards IEEE 802.11n, IEEE 802.11g, IEEE 802.11b Frequency 2.400-2.4835GHz Signal Rate 11n: Up to 300Mbps(dynamic) 11g: Up to 54Mbps(dynamic) 11b: Up to 11Mbps(dynamic) Reception Sensitivity 270M: -68dBm @ 10% PER 130M: -68dBm @ 10% PER 108M: -73dBm @ 10% PER 54M: -73dBm @ 10% PER 11M: -89dBm @ 8% PER 6M: -87 dBm @ 10% PER 1M: -90 dBm @ 8% PER Transmit Power