1. Mellow and full line, shape novel, and feeling relaxed
2. Key-press life over 150 million times, with L/M/R three button & scroll wheel
3. Resolution: 800dpi, USB port
4. 0.80M wire, one 1.5V AA battery
5. Compatible for windows 95/98/Me/NT4.0/2000/XP/Win7
6. Mouse size: L81.0*W48.5*H29.6mm , weight 42g,