Avago A5020 + Holtek 25A
Super high sensitive with 800 CPI
Maximum speed: 28 inches/second
Advanced optical sensing technology
Scroll four ways for greater efficiency
Button life over 3 million clicks
Interface: USB or Combo
Accurate definition and sensitive operation
Windows 98, 2000, ME, NT, XP and Vista compatible
Dimensions (L x W x H): 90 x 50 x 30mm
Comfortable hand touch with side rubber