This is a one of a kind special edition Ender 3 variant- this is a heavily customized Ender 3 pro. Its as powerful as a Ender 3 S1 without the sprite extruder. The special upgrades include the essential package as a base, but also: Ender 3 Pro frame Ender V2 screen and silent board PEI style flexible removable build surface Dual Z axis screws with optional Sync belt /Bearing supports installed Miriscoc Professional Firmware CR touch ABL probe Direct drive aftermarket kit Ender 3 V2 Style Tensioners on both X and Y belts