While it's not a big 4K monitor, when I used to travel a lot pre-COVID, I got a 15" USB monitor for my laptop. It was small enough to easily haul around in a ca

While it's not a big 4K monitor, when I used to travel a lot pre-COVID, I got a 15" USB monitor for my laptop. It was small enough to easily haul around in a carryon bag and gave some useful screen real estate.