Robox 3D Printer, Dual Extruder, High Definition Headlock System: Allows quick change of print head; automatic head recognition; auto-leveling system; future upgrade compatible interface Quick Fill Dual Nozzle Technology: Detailed perimeter nozzle (0.3mm); Fast infill nozzle (0.8mm); Needle-valve flow control Smart Reel System: Automatic material recognition; Rewriteable EEPROM stores material data; wide range of materials and colors available Smart Extruder System: Supports single or dual extruders; Fully automatic material loading/unloading; Closed Feedback error detection Automaker Software: East to use interface; real-time printing status; supports pause and resume printing; support for multiple printers/projects