The Logitech TrackMan Marble gives you superior comfort – for either hand. Ambidextrous design provides long-lasting comfort for right- and left-handed people. Convenient button controls let you easily move forward and backward when you’re surfing the web. Fingertip-based control enables fast, accurate cursor movements. System requirements:
For Windows-PC
• Windows® XP or Windows Vista®
• USB port
• Cd-rom drive

For Macintosh®-computer:
• Mac OS X 10.3.9 or later
• USB port
• Cd-rom drive