About this item: 
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 110 degree.