TP-LINK TL-WN781ND is designed to provide a complete end-to-end wireless performance from the server or server backbone to the switch infrastructure & down through to the desktop with the PCI Express connector. TL-WN781ND Wireless Lite N PCI Express (x 1) adapter provides a wider compatibility, fitting with any standard PCI Express slot, x 1, x 4, x 8, or x 16. Compared with standard PCI network cards, it offers increased bandwidth, reliability & more functionality, allowing you to enjoy a fast & advanced connection, such as downloading, making Internet call & video streaming. Complying with IEEE 802.11n, 802.11g & 802.11b standards, the TL-WN781ND Wireless Lite N PCI Express adapter can perfectly interoperate with all the 802.11n/b/g devices. With WMM based on the IEEE 802.11e, it provides Quality of service (Qo S) & prioritizes the network traffic. Also, WMM power save guarantees lower power consumption for environmental work. TL-WN781ND features Quick Security Setup (QSS) function, which is ideal for creating an efficient & safe connection to prevent outside intrusion, & meanwhile maximize the management resources. With the external & detachable antennas, the TL-WN781ND can fit different operation environment & guarantee the easy installation. Up to 150 Mbps makes it absolutely ideal for video streaming, online gaming & Internet calling Provides PCI Express connector having a wider compatibility with any standard PCI Express slot, x 1, x 2, x 8, or x 16 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 Detachable antennas allow for better alignment & stronger antenna upgrades Bundled utility provides quick & hassle free installation Seamlessly compatible with 802.11n/b/g products Supports ad-hoc & infrastructure mode Supports Windows 2000, Windows XP 32/64bit, Vista 32/64bit