Duet

Space Is A Beautiful Thing

Screenshots

If you have an iPad and want to configure a dual monitor, you don't have to buy another one.
Because you can use the iPad as a monitor if you put the app called Duet on the iPad and PC.
Especially if you have an iPad 12.9 inches, duet is a must.
In practice, there was no buffering. However, it was regrettable that only wired connection was possible because of the technical aspect.
You only need to purchase an ipad version and PC and MAC programs are free.
If you have an iPad, and you buy this app, you can have a dual monitor system without having to buy a high-resolution monitor.