The Ender 3 S1 is an improved version of the highly successful Ender 3. Equipped with a modernly developed direct dual-gear extruder, automatic bed leveling, and a 32-bit silent motherboard, the S1 is a very affordable printer. It features a uniquely designed Sprite extruder that allows you to print flexible materials instantly. The printer also comes with a pre-assembled CR-Touch. The CR-Touch is an optical bed leveling sensor for maximum accuracy. It not only has an optical sensor but also a metal printing pen that lasts much longer than traditional polycarbonate pens. Additionally, it offers dual Z-axis lead screws for extra stability along the X-axis and a synchronous belt to keep the lead screws synchronized.