Uperfect Delta: was $599 now $449 @ Amazon This dual-screen portable monitor folds up like a laptop for easier storage and there’s a built-in kickstand on the back. Instead of one display, you ...

Even a generous 24-inch monitor can feel cramped when you’ve got multiple windows open on your desktop (and who doesn’t?). It’s much worse if you’re confined to a laptop screen ...

Dual and triple-screen action is also preferred for heavy-duty gaming. ... Buy a new monitor cable for the secondary monitor: It may be that your cable is old and failing.