There's no need to buy a separate device.

If you want to be productive, a second screen can be beneficial. It helps you multitask and increases your workspace so you can monitor several things at once without being limited by a lack of space.

Person using a tablet and a laptop in an office setting - Afterday/Getty Images The more screen space you have when using a computer, the more your productivity can increase, as you have more ...

I literally have no idea how using your S9 Ultra as a 2nd monitor works, you mention both wired and wirelessly which doesn't help clarify at all. Could I ask you to explain that to us? But at a lower ...