... at the same time.Short the distance between keyboard and mouse.Portable and little space.Optical sense, suitable for several ... ergonomic designKey life: over 1,000,000 times System Requirements:PC or CompatiblesWindows 98, windows ME, Windows 2000, Windows XP, ... . USB interface, Plug-and-Play, no installation need. No mouse pad required, sliding on any surface . Real hardware resolution 1200dpi ...