TP-LINK TL-WN722N is a nice, little, affordable USB WiFi dongle featuring the Atheros AR9271 Chipset which is well-supported in Linux and offers WiFi monitor mode for capturing wifi data packets usually done for WiFi-hacking.

However, when I tried using the WiFi USB adapter on my Kali Linux 2016.1 running inside a Oracle VirtualBox container it did not get detected. Here is how to get the TP-LINK TL-WN722N WiFi USB adapter working properly inside a virtual container.