D-Link DWA-643 Xtreme N Express Card Adapter Delivers up to 14x faster speeds and 6x farther range than 802.11g Xtreme N technology enables HD video streaming, file sharing, enhanced Internet phone calling (VoIP), and surfing the Web Access secure wireless networks using advanced WEP, WPA, or WPA2 encryption Easy to install and use with D-Link's new Quick Adapter Setup Wizard Backward compatible with existing 802.11g and 802.11b network