Please don't buy this pen. This was a Kickstarter campaign which ended two years ago. It had 8,030 backers, 7,853 of which were at a level to get a pen.
It would have been 7,854 if I hadn't dropped my pledge down to just the support level for a couple bucks. I stayed a backer only to be able to keep getting campaign updates.
I did that because it had been discovered they didn't even have a working prototype. The videos were are fabricated.
Two years later, they have delivered 1,460 pens, a large number of which are either so glitchy they can't be used or they stopped working entirely.
The original 3Doodler is your best bet if you want a functional 3D pen. Even though it's fat and looks like a toy, it works. Because even the second 3Doodler has a number of issues. Mine has lived in its box since about a week after I got it due to never getting it to run continuously without clogging through even a single piece of filament. At least that one delivered on time.