Designed for people over 3 years old, it can add some creativity and creativity to your artistic creation Bright colors and LCD screen make your 3D pen convenient and easy to use Comes with filament material and USB cable to help you doodle Description of 3D printing graffiti pen with LCD screen and filament You can adjust the rotation speed of the 3D printing pen mechanism through the USB cable to suit your production style, and it can also help you charge. A new type of 3D drawing pen, you can make what you dream ofThe possibilities are endless Product parameters: Rotation speed: adjustable Equipment working voltage: 12V Suitable for painting workers, product designers, amateurs, children, students, etc. Package contains: 1 x 3D printing pen Size: 18.5*3.2cm