Optical Combi Mouse MI-2900Z 

• Specifications
  6 button mouse with high resolution optical technology
  High precision 1000 dpi sensor for higher response and accuracy
  Tilt scroll wheel providing convenient horizontal and vertical scrolling
  Zoom function to zoom in/out in office applications and web browsers
  Ergonomic design with rubber side grip 
   
  
• System Requirements
  Windows 2000, XP or XP MCE
  USB or PS/2 port
  CD-ROM drive