Slightly larger than Lixpen, slimmer than all 3doodler pens (yes, slimmer and more powerful than the 3 doodler Pro), 15mm in diameter for a decent grip.
No hot Parts when using low melting 3D filament.
Fit in the pencil case, you can do 3D drawing on the go with a power bank.
Using the same filament as 3D printer, you could get refills (like ink for the pen) anywhere.
Smart display fit for both right handed and left handed.
With 3D pen finger cot, safe to touch or shape what you draw in high temperature.