Adesso Trackball iMouse T1
- iMouse T1, 2 Button Desktop Trackball Mouse
- Windows and Mac compatible.
- optical sensor. 800 DPI
Reviews on amazon are more towards negative.
Many complaint that the buttons are hard to click, you need to reach all the way to the end and press with your finger tip.
But some suggest that you should adjust your hand so the ball is under the bottom of your finger.