The HP 836307-BG1 keyboard is a replacement keyboard for the HP EliteBook notebook series. HP’s parts guide identifies the 836307-xx1 series as without backlight, and specifies the -BG1 regional code for Switzerland.
This is a model-specific service part listed for the HP EliteBook 840 G4 and 848 G4. The guide describes the keyboard as secured inside the notebook and connected to the system board by cable, making the part relevant for keyboard replacement during service.