Direct ExtruderThe "Sprite" Direct and Extruder hotend assembly great for PLA/TPU/PETG/ABS filaments. Dual Z-axisHigh-precision dual Z-axis and dual-motor design. File SupportSTL/ OBJ/ AMF. Slicer SoftwareCreality Slicer(pre-install in the thumb drive)/ Cura/ Repetier-Host/ Simplify3D. Auto-LevelingCR Touch 16-Point automatic bed leveling. Advanced Technology32-bits silent mainboard, 96% pre-installed 6-step fast assembly, New UI LCD knob screen, more filaments compatibility, full of creation potential. U. S. Engineer Professional Tech Support Safe Buy100% Original Factory CREALITY Ender 3 S1, we got U. S. Engineers Tech Support and provide replacement parts free for customers, the service we provide among other Creality distributors and you wont regret with the purchase.