Does this convertor act as a second, third, monitor output

Does this convertor act as a second, third, monitor output
The reason why I ask in I have 3-28" displays with dual HDMI. I have started upgrading to 32", 4k displays. I am not looking at the mac display because using 3-pc, 2-mac mini computers at my workstation. The Mac Thunderbolt displays do not to seem to support input switching for a multi-computer environment. Does this unit act as a second, and or third monitor output for spanning the mac desktop? Or is it only a mirror of the single mac desktop?

Moshi Mini DisplayPort to HDMI Adapter (4K)

Moshi Mini DisplayPort to HDMI Adapter (4K)

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