ZyXEL ZyAIR G-405

Overview
"3751-06350002" is silkscreened on the board.

Links of Interest
Manual

Serial Pinouts
(RxD) (TxD) (GND) [3.3] J303

Pictures
User Images 

Included PSU(s)
The included power supply would seem to be a Deer Computer AD1605CF.