Tp-Link Network Tl-Wn851nd Wireless Pci Adapter Atheros 2t2r 2.4ghz 802.11g/B/N Retail TP-Link Network TL-WN851ND Wireless PCI Adapter Atheros 2T2R 2.4GHz 802.11g/b/n Retail. Wireless N speed up to 300Mbps makes it ideal for video streaming, online gaming and Internet calls. 2T2R MIMO delivers greater throughput at range versus conventional 1T1R. Supports QSS function, complying with WPS for worry free wireless security. Supports 64/128 WEP, WPA /WPA2/WPA-PSK/WPA2-PSK(TKIP/AES), supports IEEE 802.1X.