The Ender 3 S1 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 is a very affordable printer with everything you could wish for at this price point. It boasts a unique design 'Sprite' extruder allowing you to print flexible materials out of the box. It comes pre-fitted with a CR-Touch too! The CR-Touch is an optical bed levelling sensor for next level accuracy, as well as having an optical sensor, it has a metal push pin, lasting much longer than the traditional polycarbonate pins. It boasts Dual-Z leadscrews for extra stability across the X axis and it also has a synchronous belt to keep the leadscrews in sync with one another. This is arguably the best designed Ender 3 they have released, the whole machine looks sleek and their choice of materials really finishes this machine off.