TP-LINK TL-WA801ND v4

Overview

 * 802.11bgn (2.4GHz 300Mbps), 2x 4dBi, Passive PoE

"2050500806" and "1633" is silkscreened on the board.

Links of Interest

 * TP-LINK TL-WA801ND on OpenWrt wiki
 * SoC: Qualcomm Atheros QCA9533 WiSoC (listed as 560 Mhz on OpenWrt, listed as 650 Mhz here)