The Ender 3 S1 Pro is a new and improved version of the very successful Ender 3. Equipped with a newly developed direct dual-gear extruder, automatic bed leveling, 32-bit silent mainboard, among other things, the S1-Pro is a very affordable printer with everything you could wish for at this price point.
Ender 3 s1 and Ender 3 S1 Pro use direct-drive extruders. The distance is shorter in a direct drive and the retraction too. Ender-3 S1 Pro upgrade to full-metal dual-gear direct extruder with an extrusion force of 80N ensures smooth feeding when printing with different filaments. especially the flexible TPU.