While the consumer market classifies this type of system as "generation 4", the United States military describes these systems as "generation 3 autogated" tubes (GEN-III OMNI-VII). Moreover, as autogating power supplies can now be added to any previous generation of night-vision devices, "autogating" capability does not automatically class the devices as a GEN-III OMNI-VII. Any postnominals appearing after a generation type (i.e., Gen II+, Gen III+) do not change the generation type of the device, but instead indicates an advancement(s) over the original specification's requirements.