Logitech Y-R0051 bluetooth keyboard for iPad Air 2.

This has been glued to a display stand previously and still has a significant amount of this glue attached to the case. I can't tell if this is a standard unit or not, documentation online is a bit patchy; there's no external socket for charging and it's powered by a pair of CR2032 batteries in a removable tray; I don't know if it is supposed to charge from the iPad while attached by the hinged bracket or not, but what I have checked is that it connects via bluetooth and all keys are working.