Rosewill RNX-N400LX

Manual

This is a Loopcomm device.

"LOO0020 Rev:1.2" is silkscreened on the board.

On the DD-WRT forums (high-res internal pictures, OUI derived from label on back of the PCB)
 * and again (says device uses RTL8186P, which makes no sense considering this is an N-class router)

The power adapter included with the device is an unbranded YHSW-120100U (100-240VAC ~ 50/60Hz, 0.13A max. -> 12VDC 1000mA).