The device is a stock Netronix Eb-600 ereader. That should be rather obvious; Netronix owns Green Book. I 'm pretty sure it's one of the ones I posted about a couple days ago, and if it is then this unit has Wifi and a touchscreen. But under the shell it has largely the same hardware as the Cybook, Kobo, PB301, Cool-ER, and Astak Mentor.
I find that list rather cool. Netronix is in the position similar to that of a car maker who takes a single chassis and puts it under several different car names. Just think: the ereader market has expanded enough that they can afford to do this. Cool, huh?