Extra laptop display
This Cevaton Screen Extender adds two 15.6" 1080p screens that wing out from my laptop. I use it when I'm working on my treadmill desk. It folds flat when done and comes with a sturdy carrying case for travel, but both monitors plus the stand weigh about five pounds, so I don't plan to travel with it (I use an iPad as a second monitor when I'm on the road.). It comes with a variety of cables to connect to most laptops. (Note: it won't work with basic M1/M2 MacBooks.) — MF