In case you want only to duplicate display of your main monitor to another monitor, you would need an extra monitor, connecting cables with appropriate port and a video splitter. The Video splitter is an external hardware device which can be used to duplicate your computer’s output to dual or multiple monitors. The data cable connections from computer to monitor will be so that a data cable will connect your computer to video splitter and all monitors will be connected to the Video Splitter.

You can also visualize it as one to many connections. In order to look for a video splitter, you can even use the word Display Switch, although display switches can be real complex and costly as well, however a simple one to many video splitter should be really cheap and readily available.

In case you would like to control dual monitors by extending your desktop area to the other monitor, move window to second monitor and even duplicate output of your computer to both monitors, you would need a dual monitor graphics card, required monitors and associated cables. You can browse to the post named as Hardware for Dual Monitor Computer to know more about this option of connecting dual monitors to a desktop computer.

You can even have a look at the Dual Monitor Software to know what options you can have to control and manage dual monitors. Once you have got 2 Monitors connected to a Desktop computer, the one with Start Menu would be referred to as Primary Monitor and the other one would can be referred to as Secondary or Second Monitor.

Well it depends on variety of things. You can connect 2, 3, 4 or even more Monitors or Display Devices to a Single Computer.

Why to connect more than one monitors to a single Computer? What’s the Use of it? How much will it cost?. There are many many details involved here and there can be really many uses of connecting dual or multiple monitors to a single computer. Dual Monitor Software can be of use to anyone who has more than one Monitor or Display Device connected to a Single Computer.

Let’s talk about possible uses

Image One Monitor as Main Monitor and Another Monitor Displaying the same Output or in a Clone Mode. This configuration can be of use when you wish to share your desktop with audience and have control over what you display on your Computer.
Or Let’s say your Desktop Spanning across Dual Monitors extending your Desktop and providing you more working area. How about watching TV on Second Monitor and working on First Monitor?
Yes there is extra cost involved here, but does it sounds it can be useful?