KSRplayer Upgraded Version ABS Filament Auto In/Out 3D Drawing Printing Magicpen Pen V2.0 With LED Free Filament For Children Printing Artist Drawing Doodler Automatic Feed/Out (Blue) 1. Upgraded Version ABS Filament Auto In/Out.3D printing pen replaces ink with plastic(1.75mm ABS or PLA Filament) to create 3D object, It can be used to draw in the air as well as tracing objects on paper. 2. 3D doodler pen bring your art ideas to reality with user friendly functions, you can easily control extrusion speed, temperature, filament; most important thing is it is only 65g in weight compared others in heavy design. 3. Advanced unclogging mechanisms technology prevents jamming for easy maintenance. 4. 3D printer pen is perfect for kids and adult no matter you are artists, hobbyist or creative lovers. 5. This technology incorporated in our model is based on the exact FDM (fused deposition modeling) as 3D printing technology - which today's leading 3D printers such as Makerbot, 3D system, and Afinia have adopted.