[Intelligent adjustment]: This printing pen has different speed adjustments, which can accurately control the filament extrusion speed. You can display the temperature from the LED display and control the temperature to melt different printing materials [Humanized technical design] The pen adopts the blocking machine technology design to prevent jamming. After closing, the wire will automatically retract, this design can prevent the damage caused by the failure to leave in time after the fuse, and the residue will be automatically eliminated. If the design is not used after five minutes, it will automatically go to sleep without worrying about wasting materials or damaging items [Compatible Materials] Compatible with most 3D printing materials in the market, dont worry about not finding materials The refill is a standard size, and extra filament can be purchased when used up. The printed materials are harmless to the human body, non-toxic and harmless, and can be used with confidence [Unlimited age] The original intention of making 3D printing pen is for your whimsy, whether it is a child or an adult, as long as you have a broad mind and have it, the dream will become a reality that will no longer be a dream [Gift for children] This magical pen can stimulate children's creativity, design, planning, architecture and space understanding. Let your child have the talents that his peers don't have from the beginning Give it to the children, let them make everything they imagined into reality