All Metal Ultra Silent Impresora 3D Printer Auto Bed Leveling With TMC2208 Stepper Driver Meanwell Power Supply   Ultra Silent with TMC2208 Stepper Driver TMC 2208 stepper driver version up to 256 real micro-steps.   Automatic Bed Leveling Auto-leveling frees you from time-consuming and labor-intensive leveling tasks.   Power Outage RecoveryResume printing and recover from exactly where it left off. No worries about unexpected power outages.   Filament DetectionFilament detection that detects the filament end and sent reminder to avoid air-printing.   Automatic Filament AssignmentAutomatic load and unload the filament with just a click.   Assembled In No TimeWith modular designed units, you will be able to quick assemble your ET4 on your first try in 10min.   Integrated Modular DesignIntegrated, modular design with terminal pinboard for connection ports, covered wires and a more sleek appearance.   Designed With Safety In MindThe mainboard features thermal runaway protection.    2.8-inch Touch Screen2.8-inch LCD full-color touch screen for easy operation.   Well-Made All-Metal FrameET4 is built to last with high strength aluminum frame. Enclosed metal unibody design enables a more stable and rigid structure with compact size.   Please Follow The Video To Make The Leveling   1. Make the nozzle temperature is not over 50 degree.   2. Connect the leveling sensor cables well to the adapter.   Anet 3D printer ET Series 3D Printers Comparison