Portable Finger Hand Held 4D USB2.0 Mini Trackball Mouse (190CM-Cable)
Off table and without limitation of operational space - Ideal for laptop users - Thumb-controlled trackball - 4D page scrolling function can be controlled simply by your thumb - Plug and play no software required - Fit left and right handed users - Compatible with Windows 95/ 98/ 2000/ ME/ XP/ NT