Advanced Technology: This 3D printing pen is designed with advanced clogging mechanism technology to prevent jamming. After exiting, the 3D filament will automatically retract to avoid jamming. Leftovers will automaticallylocked out. Auto standby, if you don't use it for about 5 minutes, the temperature will lower and shut down automatically. Safe and easy to use: just plug in, heat up, insert filament and pull. No matter you are a beginner or an expert, you can easily master it. If this pen is not used for 5 minutes, it will go into sleep mode.safe for children. It comes with 2 finger guards to cover your thumb and forefinger when in use. LCD Screen: The LCD screen of this 3D pen clearly shows not only the type of materials used (ABS or PLA), but also the temperature. So it will be easy and convenient for you to control this 3D pen to increase itor reduce extrusion speed to avoid clogging. Environmentally friendly materials: The 3D smart drawing pen is made of skin-friendly materials, leads and 3D pen have no strange smell. An ecological and comfortable artistic lifestyle. He isgood for your children's health. This 3D printing pen is compatible with PLA and ABS. Bonus US: 3 random colors, 1.75mm diameter, 9.1m PLA filament. Creative gift for children: 3D pen set as a creative gift for children over 8 years old, artists, fans. Helps children to improve spatial thinking, creativity and artistic skills, enables childrento create creative patterns without the limits of imagination. This 3D pen is a good partner for you and your kids to make artistic creations.