NeXxT Solutions Acrux 300 (ARN03304U1)

"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.