TP-LINK ARCHER T2U AC600 DUAL BAND WIRELESS USB ADAPTER, AC600 (200 Mpbs on 2.4GHz band and 433 Mbps on 5GHz band) wireless speed, 64/128-bit WEP, WPA/WPA2, and WPA-PSK/WPA2-PSK encryption standards 433Mbps on 5GHz is ideal for HD video streaming and lag-free online gaming, while 200Mbps on 2.4GHz is perfect for normal use such as web surfing with legacy devices.