This monitor isn't meant to just sit on your desk. The LG StanbyME can go anywhere. It has a battery, smart TV OS, and a touchscreen.

You don’t have to be limited to a single screen if you use a laptop, and desktop users can also get their own touchscreen screen extension! Desklab Portable Touchscreen Monitor (4K) is an all-in-one ...

Ignoring the poor touch functions, the Delta Max is a good-looking and well-built and super-adjustable portable extended dual screen that connects to your MacBook for a more spacious screen experience ...