Quick overview from the supplier:
USB2.0 Wireless LAN Adapter TP-LINK "TL-WN821N", 300Mbps,2T2R, 802.11n/g/b, 2.4GHz
// Provides two methods of operation: Infrastructure and Ad-Hoc
Adopts MIMO technology for wireless rates of up to 300Mbps
Adopts CCA technology which automatically avoids channel conflicts using its channel selection feature
Quick Secure Setup, complies with WPS for worry free wireless security
Supports 64/128/152-bit WEP, complies with 128 bit WPA standard(TKIP/AES), supports MIC, IV Expansion, Shared Key Authentication, IEEE 802.1X
Simple Configuration and monitoring
Supports Roaming technology, guaranteeing efficient wireless connections.
Supports Windows 2000/XP/Vista OS
