Product Description * Innovative horizontal and vertical scroll modes, programming the context menus, as you like. * Easy zoom-in and zoom-out, stimulates and control keys for direct zooming/page changing control, and various zoom factors and lens available on-line. * Control software works with windows 95/98/NT/2000,. * PS/2 or USB Specifications * Hardware resolution: 800 DPI-super * Cable Length: 1.5m