What drivers do I need?
There are no special drivers. The Tracker Pro 2 uses the generic USB Human Interface Device (HID) drivers of the operating system.

What are the dimensions of the Tracker Pro 2?
The Tracker Pro is 2.87” (73 mm) x 1.20” (30.5 mm) x 1.95” (49.5 mm) and weighs 2.40 oz. (68 grams).

Why is the cursor moving too fast or slow
There is a speed setting switch on the Tracker Pro 2 (I=fast / II=slow) you will want to adjust. Once the control on the Tracker Pro 2 is set, use the mouse setting of the operating system to fine tune the speed.