System Requirements PC PC Windows® 7 and Windows® 8 USB port or PS/2 port Mac Mac OS X 10.5 or later USB port Package Contents Logitech TrackMan Marble Quick-start guide All-day comfort Whichever hand you use, this mouse keeps you comfortable and supported all day—and stays in one place. Back and forth Convenient Forward and Backward buttons help you get around the Web with ease. Marble marvel Fast, accurate control is right at your fingertip with smooth-tracking Marble® optical technology. Ambidextrous trackball design A trackball design with a long, broad palm area and gentle curves keeps your hand comfortable and supported all day—whether you use your right or left hand. Stable base Your hand stays comfortable all day long with this stay-put design. Plus, it saves you space.