Kensington has creating products for more than 20 years that help you and me connect with our PC's wether it be wired or wireless. Kensington sent by their Expert Wireless Mouse Optical Trackball for me to give a once over the, Expert Mouse is Kensingtons top of the line wireless trackball. I know trackballs have been the norm for designers, photo/video editors, and architects but there are some who prefer the feel and accuracy of a trackball over a conventional mouse.