Nexxt Solutions Acrux 300 (ARN03304U1)

Overview
"2050500178 Rev:1.1" appears to be silkscreened on the board.
 * Per the manual, the default SSID pattern is Nexxt_XXXXXX.

The manual also shows a sample MAC with a 6C:FD:B9 (Proware) OUI.
 * TP-LINK is a Proware brand.