The Trendnet TEW-805UB is a WiFi USB Adapter which supports the IEEE standard 802.11ac. The stick has the USB ID 20f4:805b and bases on the Realtek RTL8812AU chipset.
The TEW-805UB is not automatically supported by the standard Linux kernel. However, a Linux driver for the adapter are provided by Realtek. This driver has to be compiled per hand and can be downloaded from http://wikidevi.com/files/Drivers/Realtek/rtl8812AU_8821AU_linux_v4.2.2_7502.20130517_addl_IDs_added.tar.bz2.