OS X Lion: About wired and wireless keyboards
Wired and wireless keyboards designed for use with OS X Lion feature Launchpad and Mission Control function keys.
Although these keyboards are designed for and work best using OS X Lion, they also work with Mac OS X v10.6.8 Snow Leopard and iOS—such as with iPad and iPhone. When used with Snow Leopard, the Launchpad key functions as a Dashboard key instead.
Using these keyboards with operating system software other than Snow Leopard, Lion, or iOS may result in some keys not working as expected; keyboard-based brightness controls, music and video navigation keys, and volume controls may not work as expected. In this situation, control brightness and volume with System Preferences panes. Music and video navigation can be controlled from applications such as iTunes or QuickTime Player.