"The wireless Mighty Mouse features a single seamless enclosure with programmable touch sensors that act as primary or secondary buttons. With a simple click on the upper right or left side of the mouse, users can instantly access features such as contextual menus found in Mac OS X and other applications. The wireless Mighty Mouse’' two other buttons are activated by pressing its Scroll Ball and squeezing its sides, and can be easily programmed to give users one-click access to Mac OS X 'Tiger' features such as Spotlight, Dashboard and Exposé, or to launch any application such as Safari or iChat," claims a press release from Apple.
The Mighty Mouse also features an advanced power management system, which means that low power mode is engaged when the device is not in use. The mouse works with one or two AA batteries.
Information on the Apple Website here.