Z-motion controller mimics Wiimote

While you can’t exactly play the Wii with this wireless Z-motion controller, it does pretty much the same thing albeit on a computer platform. The Z-motion works as a 3D mouse, virtual keyboard, laser pointer, spotlight, and highligther. I wonder whether it requires a sensor bar like the Wii to work, or does if fuction purely on radio waves? If it is the latter, how does it detect the space/dimension that it’s in? Those’re questions best left to engineers – as an end user, the Z-motion is pretty much king when it comes to the ultimate presentation tool.