PCI Express x 1 interfaceDual-band support - 2.4 GHz or 5 GHz channels bring an optimized HD video streaming file sharing and online experienceTodays fastest wireless speeds of up to 450MbpsThree omni-directional detachable RP-SMA 2dBi antennas increase wireless performance and stabilityCompatible with Windows 7 3264bit Windows Vista 3264bit Windows XP 3264bitSupports 64128 WEP WPA WPA2WPA-PSKWPA2-PSKTKIPAES supports IEEE 802.1XSeamlessly compatible with 802.11abgn products TP-Links 450Mbps Wireless N Dual Band PCI Express Adaptor TL-WDN4800 allows you to connect a desktop computer to a wireless network and access a high-speed wireless network connection. Complying with IEEE 802.11abgn the device can use the 2.4 GHz or 5 GHz channels and provide wireless speeds of up to 450Mbps which is ideal for users seeking a highly robust bandwidth intensive wireless networking experience particularly with HD video streaming and online gaming. Dual-band is the latest wireless technology allowing the adaptor to connect with a 2.4 GHz or 5 GHz network. This allows you to check e-mail and browse the Internet using the 2.4 GHz band or stream HD movies and other media on the 5 GHz band. The advantage of working on the 5 GHz band is that unlike the crowded 2.4 GHz band shared with microwaves cordless phones and other wireless networks it has much less interference and can provide a more stable wireless signal which is ideal for online gaming and HD video streaming.