trackball logitech trackman marble mouse, usb

Trackball Logitech ® TrackMan ® Marble ® provides perfect comfort for either hand. Design for both hands ambidextrous operation provides lasting comfort. Convenient control buttons allows for easy forward or back while surfing the Internet. After pressing the two large buttons at the same time can be used to automatically move the ball in the document. Fingertip controls for quick and accurate cursor movements. Patented Marble ® optical technology ensures smooth tracking. Main features: Track