The flat-top window is a user-installable, see-through cover installed on the top of the media cover. It allows PD43 to fit into more space-constrained environments.
User-installable label-taken-sensor provides ability to continue serial printing only after label or ticket is removed from the front of the printer. (All RoHS compliant.)
The user installable Battery Basebay attaches to the base of the printer and holds the rechargeable battery (sold separately) to provide mobile printing. Must be attached to printer for charging...