Adjustable speed and temperature: with 8 different speed levels, it is more accurate to control the filament extrusion speed. The temperature can be adjusted to melt different material. Led screen displays the real-time temperature Advanced technology: This pen is designed with advanced clogging mechanism technology to prevent jamming. After quitting, the 3D thread is automatically retracted to avoid jamming. Resist are automatically excluded. Automatic sleep when not in use for about 5 minutes Material in standard size: two modes compatible with 1.75 mm places and ABS filament. Refill is standard size so you can buy extra filament when it runs out. 3D pen is made from skin- materials and places material is non-toxic and odourless Creative gift for kids and adults: 3D pen set as a creative gift for yourself, kids over 8 years old, adults, artists, hobbyists. This 3D pen allows you to create creative motifs without limits of imagination. Unlike other 3D printing pen, The Acerb 3D pen can also use 5V/ 2A power bank. You can draw your creation anywhere 18-Month warranty: supported with 18 months warranty and 30 days no reason refund or replacement. If you have any question about the 3D pen, please feel free to contact our customer service team