alternative that is ideal for users with moderate to severe motor
skill difficulties.The trackball is easy to operate with your finger-tips.
It features three buttons, which are guarded with a removable finger
guard which helps locate the correct switch, support the hand, and
avoid pressing wrong keys. A useful latching 'drag-switch' is also
fitted. No additional software is needed. Comes complete with three
switch sockets in case you need to attach switches to replace the