TP-LINK TL-ER604W

Overview
"2021500144" and "Rev:1.0" is silkscreened on the board in the FCC photos.
 * The Flash chip used may be a 8MB W25Q64BVSIG (or something like that).
 * It would appear the device is using an Atheros AR934x WiSoC
 * (... or some other similarly specced WiSoC).

The manual states that the device is using..
 * A MIPS32 network processor
 * 64MB of DDR2 RAM

TP-LINK specifies the device has 4kV lightning protection..
 * hence the SafeStream designation.

The power supply shown in the FCC photos is a TP-LINK branded
 * T120100-2B1 (100-240VAC ~ 50/60Hz, 0.3A -> 12VDC, 1A).

Links of Interest

 * Datasheet
 * Interface simulator