Specification:

1) 800/ 1200 /1600 /2000dpi change without driver.

2) Changeable scroll speed: 3/9/27/81 rows with each click of the wheel

  3) In office operation, with "Fire Button", You can open files just 1 click and series bullets in games,

4) Running smoothly on any surface

5) Zoom-in/out functions

6) Button life: over 3, 000, 000 times

7) System requirement: IBM, PC Windows 9X, 2000, ME, XP and NT4. 0, Windows Vista

Port: USB

Packaging: Gift  box , Color box