Beeline SmartBox Giga

Overview
"DBE00B-1.6MM" and "R.DBE99S11CC" is silkscreened on the board.
 * OEM: SerComm (AC1200 Wireless Router)
 * Dual Band: 2x2 802.11an/ac + 2x2 802.11bgn

Links of Interest

 * SmartBox series
 * Beeline SmartBox GIGA on 4pda forums (PCB images)

Serial Pinouts

 * J4, 4-pin header (1 - gnd,2 - tx,3 - vcc,4 - rx)