Cordless TrackMan Optical Trackball This cordless, finger-operated trackball eliminates the cord clutter and provides precise, accurate, optical performance. Logitech's smart power management allows the trackball to work beyond six months on the included AA batteries. The low battery indicator gives plenty of warning before the batteries need to be changed. The ultimate trackball. Only from Logitech. No cord, no clutter, no hassle: cordless freedom, optical precision Comfortable, right-handed shape with a large, finger-controlled trackball