Special Features:

Micro trac handheld trackball; ideal for usage with laptop computers; can be operated in various ways, avoiding harm to palm, joint or muscles; 3 button design with trackball; trackball controlled by thumb; connects to computer through the usb port, ps/2 adaptor included; plug and play (no software required); windows 95/98/nt/2000/me and xp compatible; metallic silver

Properties:

A device which includes a sphere mounted in a small open-topped box. The sphere is hand-operated by rotating it in a backward, a forward, or a sideway direction while maintaining the device in a fixed location. The movement of the sphere generates a signal which may be used to move a cursor and/or tracking symbol on the face of a display, such as a cathode ray tube; to input data into an electronic system; and/or to control the operation of a system. It may or may not include additional input devices, such as switches or variable resistors.