NEXGADGET Intelligent 3D Pen, 3D Printing Pen Compatible with PLA / ABS Filament + 3 Free 1.75mm Filament Refills - Blue A Hand-Held 3D Printer: It works in much the same way, heating plastic filament and extruding it, only with this device you can create objects totally free-form. You can literally draw in 3D with it. Please use Nextech 3D Pen Filament (ASIN: B01A3VD2XW and B01A3VD2XC) as filament Refills for optimal performance. 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. Patented Nozzle: Adopting embedded connection make it more convenient to maintain and replace. What's more, it's a security 3D pen with smart tempreature sensing and heating. it can keep lower temperature in tip to avoid scald your hands. Universal 3D Pen: Replacing ink with plastic(PLA and ABS filament) to create 3D object. Coming with 3 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.