The Matrox DualHead2Go Analog Edition is a device that enables multi-display functionality from mainstream laptops or desktop PCs. It works with a computers' analog monitor output, and splits the display signal between two external monitors by pretending to be one extra-wide display. The host PCs graphics solution does all the processing, so the device (which looks like a little black box) is pretty compact, lightweight, and quick to set up.
The pocket book sized DualHead2Go is compatible with a collection of recent Intel, nVidia and ATI mobile graphics chipsets, at desktop spanning resolutions of exactly 2048x768 (60, 75, 85 Hz) or 2560x1024 (60Hz). This limits the usefulness of the DualHead2Go in some respects, as its two supported resolutions are not universally supported by all notebooks, or driver versions.