i have an sir-pnr1 connected to my z2, and i purchased it used, so no box. i installed the unit (in a location i do not care to get to again), and now i need the esn, and don't know how to get to it through the menus. i previously had an external kenwood setup, that ran through the FM, and was able to pull the esn up through the display. anyone know how to do this on the z2?

Isn't it on channel 0 or 1?

Channel 0