Filament Monitor: The CR-10 S comes with a convenient monitor that will detect when the printer has run out of filament, automatically pausing the print, and will alert the user to restock the Filament before continuing. Say goodbye to wasted Filament and time. Resume Print: The new upgraded control board enables the capacity to resume printing after changing filament, or power outage. Headache-Free Assembly: The CR-10 S is shipped partially assembled in 3 parts; it is easy to complete the assembly process. It takes approximately 20 minutes to assemble. Dual Z-Axis: Dual lead screw Z-axis design, gives much more stability and accuracy than single lead screw models sold by the competition.