This Canon DR-E19 DC Coupler is compatible with the EOS-1D X Mark II DSLR. It is used with the general purpose AC Adapter AC-E19 to provide a constant power supply when shooting indoors.
★★★★★ Works exactly as described with my EOS-1D X Mark II and AC-E19. Gives reliable constant power for indoor shoots and saves me from swapping batteries. Great genuine Canon accessory.