The Kensington Orbit Wireless is a great starter trackball to get

[Windows Central]

A great mid-range trackball without the cable.
In recent times I've been converted to using a trackball for all non-gaming, daily PC use. Since doing so I've had less fatigue, fewer cramps in my hands, and it's been an overall more pleasant experience than I could ever have imagined. The weapon of choice? The Kensington Orbit.
There is another Orbit, though. At first glance, it looks identical, but the ball is red, not blue. In many regards, it is the same, but in one important way, it's different. This is a wireless Kensington Orbit trackball with Scroll Ring, an updated version of the original Orbit wireless.

Full story from the WindowsCentral blog...