Resume Print Function: Ender 3 has the ability to resume printing even after a power outage or lapse occurs. Easy and Qucik Assembly: It comes with several assembled parts, you only need about 2 hours to assemble 20 nuts well. Advanced Extruder Technology: Upgraded extruder greatly reduces plugging risk and bad extrustion; V-Shape with POM wheels make it move noiseless, smoothly and durable.