trackman trackball mouse

Logitech TrackMan Wheel Optical

Very Good
Logitech recently replaced this Trackman Wheel with the new wireless M570, and is currently hard to find. The Trackman wheel is slightly bigger than the M570 and has a wire, but this is exactly why some people prefer it.

Logitech Cordless TrackMan Wheel

Very Good
Logitech recently replaced this Cordless Trackman Wheel with the new wireless M570, and is currently only available in eBay. The Cordless Trackman Wheel is slightly bigger than the M570 and has only two buttons.