1、Kit Contents: This 3D printing pen kit has 1 printing pen, 1 plugging needle, 3 printing cables, 1 charging cable, 1 copying board, 10 paper cards. 2、Operation Procedure: Plug the adapter into the back of the pen and pick the filament. The red lighting comes on to indicate preheat. Double click the forward button to start and insert the filament through the back of the pen. 3、Complete the Design: Once the filament has reached the tip of the pen, click forward to stop. Press and hold the forward button or double click to get a continuous flowing. Once you have completed your design, press and hold the reverse button to retract the filament. 4、Improving Ability: Our 3D printing pen helps children's improve spatial thinking and art skills, creating nice family time together for you. 5、Stepless Speed Function: Our 3D printing pen has a stepless speed slider for optimal speed adjustment. It can be competent for nice filling work. 6、Applicable Scenarios: The 3D printing pen kit is suitable for making handcrafted gifts or decorative utilities, or for daily repairs around the house.