well i don't know really what for , but maybe someone could tell.

and yes, 120 is very much for 770 also power cables this not give the 770 it's mobility..

thanks Odin for info about the research , but also currying keyboard and mouse is not good too.

but all this invent will give a wide range of invention & more ideas to n770
like connecting USB webcam , connect your mobile to u'r n770 through USB to add ringtons and such things....etc.