Black Thumb Trackball Mouse in Villa Park, IL

1.Used Mini USB Mouse  ?
2.Off table and without limitation of operational space  ?
3.Ideal for laptop users
?4.Thumb-controlled trackball
?5.4D page scrolling function can be controlled simply by your thumb?
6.Can avoid the harm on your wrist and muscle ?
7.Plug and play ,no software required
?8.Fit left and right handed users  ?
9.Unit Dimensions