Hi Guys, this model MP01 is the first multi-filament 3D pen in the world, it is very easy to change color or mix colors.Let’s see what are there in the package: manual, filament, 3D pen, adaptorLet’s learn the function of each button,  filament loading button, temperature button, filament control button, speed buttonLet’s see the pen how to work, connect the cable in to the socket, screen will be power on, you can see the info of filament type, speed and temperature on the screen, press loading button to reheat, when the temperature heating up to the target temperature, it will be ready to work, put the filaments into the hole, choose filament colors and move their button freely, it is very easy to change color or mix colors.