EASY to USE for KIDS and BEGINNERS: The K1 SE with auto-calibration gets everything ready. Bid farewell to the frustrating leveling work with calibration paper. The fused deposition modeling 3d printer from unboxing to powering on in 3 minutes and comes pre-assembled and pre-tuned before shipment. After an easy phone-like unboxing & set-up, it is ready for plug-and-play 600MM/S FAST PRINTING: The K1 SE 3D printer uses a Core XY structure, with a travel speed of 600mm/s and 20000mm/s² acceleration, which is 12 times faster than a regular 3D printer.Combining speed and quality in an enclosed space ensures more stable print quality 3S QUICK to SWAP DURABLE TRI-METAL NOZZLE: Durable steel-tipped copper nozzle integrated with a titanium alloy heatbreak. It blocks heat-creep and allows one-hand swap.The nozzle takes 75 seconds to heat from 0 to 300. A dynamically balanced part cooling fan produces fewer vibrations which are mitigated by active input shaping.