This product is either discontinued or we cannot get that from suppliers.
Asus USB-AC68, Network IEEE 802.11 a/b/g/n/ac, AC1900 ultimate AC performance 600+1300 Mbps, Interface USB 3.0 *1, Operating Frequency 2.4 GHz / 5 GHz, O/S Windows® 10 86x64, Windows® 8.1 86x64, Windows® 8 86x64, Windows® 7 86x64, Mac OS X 10.7, Mac OS X 10.8, Mac OS X 10.11.
The ASUS USB-AC68 is a dual-band USB Wi-Fi adapter that instantly upgrades your desktop or laptop to the novelist 802.11ac technology with Wi-Fi speeds up to 1300 Mbps (5GHz) and 600 Mbps (2.4GHz).