The Kensington Orbit Trackball Mouse with Scroll Ring K72337US is a sleek black ergonomic mouse designed for optimal comfort and productivity. With its optical tracking method and two buttons, this wired USB trackball offers smooth and precise control. Made by the trusted brand Kensington, this mouse features a unique scroll ring for convenient scrolling and is compact with dimensions of 2 inches in length and 8 inches in height. Perfect for users looking for a reliable and efficient trackball solution.