From Manufacturer
The Orbit Optical Trackball from Kensington is an optical trackball pointing device that can be connected to your computer via a USB. The 2-button trackball features Kensington's DiamondEye optical technology that provides you with extreme precision while navigating. It is fully compatible with both Macintosh and Windows computers, making this trackball a great choice for your computer.
Optical Technology
Optical sensors provide users with a maximum amount of control over their cursor, giving you much better response than traditional mechanical trackballs.
Mac and Windows Compatible
The trackball works with both Mac and Windows computers, letting you easily integrate it with your system no matter what operating platform you prefer.