mouse :

  Features:
51 mm (2 inch) opto-mechanical trackball
3 standard mouse buttons
Highly reliable micro-switches technology
Removable wrist rest pad
PS/2-USB combo connector
Specifications:
Compatible OS: Win 98SE/2000/ME/XP
Switch life: 1,000,000 cycle life
Package: Gift box
Package Dimension: 242*193*63(L*W*H) mm
 

Whatever it is you're looking for in a mouse, you'll find it in the new trackball mouse by ione USA. Its hand-hugging design offers less arm movement for maximum comfort and improved functionality. And because it remains stationary, you'll save valuable desk space.

Libra 90 Trackball  [TB-Q90]    $29.95