And while there are plenty of budget options out there, right now you can get this Asus ZenScreen portable monitor for just ... With standard Windows drivers, you can either mirror your laptop ...

you can boost your productivity with a portable monitor. That’s right, you can have a dual-screen setup while on the go! And right now, this gorgeous Asus ZenScreen is on sale for $169 on Amazon ...

However, there is an upper realistic limit to screen size. Which is where the best portable monitors fit in. The new Asus Zenscreen MB249C is an example on the larger side of portable screens.