TP-Link TL-WN821N 300Mbps Wireless N USB Adapter TP-Link TL-WN821N 300Mbps Wireless N USB Adapter & Infrastructure and Ad-Hoc Adopts MIMO technology for wireless rates of up to 300Mbps. Experience interruption-free performance and exceptional data transfer speeds with the TL-WN821N 300 Mbps Wireless-N USB Adapter from TP-LINK. This USB network adapter enables you to add wireless Internet connectivity to your notebook or desktop computer or upgrade its connectivity. MIMO technology, along with internal intelligent antennas, combine to deliver wireless transmission rates of up to 300 Mbps and exceptional stability. Compatible With: Operating System: Windows 7(32/64bits), Windows Vista(32/64bits), Windows XP(32/64bits), Windows 2000