Owner of 2 pinecils here, there are buttons and a display that shows the current temperature and other stuff. I only just learned that there’s an app, it works more than fine on its own, out of the box.
I got that specific iron because I needed to power it from 12v, and it works very well on the USB PD power supply I already have for my laptop.
Which may or may not be part of China, depending on who you ask… (don’t ask me, I’m just a random dude on the other side of the world)