JDKOOL Professional 3D Printing Pen 0.5MM Nozzle diameter with LCD Screen Compatible with PLA / ABS + Safety Holder + 4 Free 1.75mm Filament Refills (Gold) This third visition 3D Pen developed based on customers and public demand. More slim with best handle curve style for easy holding, super lightweight only 50 grams. Outdoor Painting: Power Supplier: 5V 2A. It can be driven by standard power bank. No need AC/DC adapter, just plug the device into your USB port, so you can enjoy your paintings anywhere. 0.5MM Nozzle diameter will let you draw more detail Universal 3D Pen: Replacing ink with plastic(PLA and ABS filament) to create 3D object. Coming with 4 PLA loops of filament refills to get you started! Ultra Safety and Universal Compatibility: CE ROHS FCC Certified, 1 year warranty. The pen will get into sleep mode itself after 2 minute no use. Safest 3D Pen for you and your family.