Resume Printing 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 Safety Protected Power Supply: Only needs 5 minutes for hot bed to reach 100 degree Strict Test: Strict testing for key components before delivery and supports available