USB2.0 Wi-Fi N LAN Adapter TP-LINK "TL-WN821N", 300Mbps// Provides two methods of operation: Infrastructure and Ad-HocAdopts MIMO technology for wireless rates of up to 300MbpsAdopts CCA technology which automatically avoids channel conflicts using its channel selection featureQuick Secure Setup, complies with WPS for worry free wireless securitySupports 64/128/152-bit WEP, complies with 128 bit WPA standard(TKIP/AES), supports MIC, IV Expansion, Shared Key Authentication, IEEE 802.1XSimple Configuration and monitoringSupports Roaming technology, guaranteeing efficient wireless connections.Supports Windows 2000/XP/Vista OS