Logitech Trackman Marble Trackball Mouse

Trackball comfort - sculpted ambidexterous shape supports your right or left hand and stays in one place—move the cursor without moving your arm convenient controls - moving quickly between documents or browsing your favorite web sites is a breeze with large, easy-to-reach back/forward buttons zero setup required - flexible wired connectivity means you just plug the cable into your usb or ps/2 port - it works right out of the box. programmable controls - configure the buttons to do exactly what you want like switching applications, opening browser windows or jump to full screen while watching videos