This product is either discontinued or we cannot get that from suppliers.
TP-link Mercusys Ac650 MU6H, High Gain Wireless Dual Band Usb Adapter, Antenna 1 External High Gain, 5dBi, Wireless Standards IEEE 802.11b/g/n IEEE 802.11a/n/ac, System Windows10/8.1/8/7/XP, Interfaces USB 2.0.
MU6H receives Wi-Fi signals on two separate bands. Supporting 256-QAM technology increases 2.4 GHz data rate from 150 Mbps to 200 Mbps for 33% faster performance.