|This sharp-looking wireless keyboard and mouse work even better than they look. They use advanced 2.4GHz technology for extended range and interference-free communications with your computer. Using a high-resolution laser for accurate tracking, the mouse can be switched from 800 to 1600dpi for incredible response. The keyboard's unique "X-structure" key mechanisms are rated for over 10 million key strokes each. Includes wireless receiver. Requires 3 AA batteries, included, and Microsoft Windows 98SE+.