Edimax IN-7858Mn

802.11b/g/n 2T3R Wireless Access Point Module

"1246-00000059-01Z" or something similar (low-res image on the FCC website) is silkscreened on the board.

This device appears to be used by Billion in some of their products (FCC ID: QI3BIL-RT2880MD, model: AAZWMNIIN7858MNX00).

Possible 00:1F:1F (Edimax) OUI (on MAC label attached to the EUT in the FCC photos)