Logitech TrackMan Marble gives you superior fort - for either hand. Ambidextrous design provides long-lasting fort for right- and left-handed people. Convenient button controls let you easily move forward and backward when you're surfing the Web. Click the large buttons together and use the ball for auto-scrolling. Fingertip-based control enables fast accurate cursor movements. Patented Marble optical technology ensures smooth tracking. Left handed? Right handed? When you're working on your puter day and night and you want more flexibility the Logitech Trackman Marble will help increase your fort level.Primary Information Input Device Type :  Trackball Device Form Factor :  External Connectivity Technology :  Cable Buttons Qty :  2 Interfaces :  USB System Information Features :  Logitech Marble optical technology System Requirements System Requirements / OS Required :  Apple Mac OS X 10.3.9 or later Microsoft Windows Vista / XP Service & Support Service & Support Type