Features: Easy-to-operate 3D printing pen, one press the button for filament loading, long press for unloading. Work well with 1.75mm PLA filament, comes with 2 * 3m free PLA filament. (Random filament color delivery. ) No-blocked design nozzle ensure smooth fluid drawing experience. With LED working indicator, red for power on, red flash for pre-heating, green for ready. With CE, ROHS, FCC, WEEE other certifications, every pen will be tested before delivery, safer for children. Comes with USB cable, can be powered by any power supply at hand, such as power pack, PC etc. Compact small size and lightweight, easy to hold, comfortable for long time usage. Nice packed, best gift for inspiring children's imagination, creativity and manipulative ability. Usage: Pulling out the filament with your hand directly will cause great damage to the 3D printing pen. Please long press to unload filaments and wait patiently.