【Efficient Automatic Winding】Electric 3D filament respooler enables rapid automatic winding, compatible with 1kg spools. Solves tangled/loose filament issues, keeps consumables neat and ready for use, saving your time on filament arrangement 【Powerful Stepper Motor Drive】Equipped with a high-precision stepper motor, it has strong power and smooth operation. The top can easily accommodate heavy-duty consumable spools weighing up to 4KG, achieving stable and reliable winding 【3-Speed Adjustable & Versatile Control】Features 3 adjustable speed settings (15-24V DC 1A power supply), allowing you to flexibly switch speeds according to different filament types and winding needs for precise control 【Auto-Stop Safety Feature】Comes with an auto-stop function that pauses winding when the filament reaches approximately 1KG; simply manually restart to continue, streamlining your printing workflow and preventing overfilling 【Space-Saving Design】Dimensions of 30×30×20CM make it a space-efficient addition to your 3D printing workspace, perfectly fitting on standard desktops or storage shelves without taking up too much room