Quick overview from the supplier:
USB AC1200 Wireless LAN Adapter TP-LINK "Archer T4U", 1200Mbps
// (400Mpbs on the 2.4GHz band and 867Mbps on the 5GHz band) with support for the next generation 802.11ac Wi-Fi standard*
Dual Band Wireless - 2.4GHz and 5GHz bands for flexible connectivity
High gain antennas – Improved range, signal quality and transmission performance
MU-MIMO –Delivers highly efficient wireless connection**
Super Speed USB 3.0 Port - Up to 10x faster transfer speeds than USB 2.0
WPS Button - Easy wireless security encryption at the push of the WPS button
