What's a virtual color managed device?
A virtual device is a color managed device that is not connected to the computer. Examples of this might be:
An online print-shop where photos are uploaded, printed and sent to you
Photos from a digital camera stored on a memory card
To create a virtual profile for a digital camera just drag and drop one of the image files onto the System Settings ▸ Color dialog. You can then to it like any other device or even it.