iKey is the authorized United States distributor for Cursor Controls, the leader in designing and manufacturing robust pointing device solutions for medical, military and commercial screen-based applications. These trackball products are developed for use in the harshest environments where precise cursor control is essential. The P75 is a 75-mm trackball that features high-resolution pixel tracking. The combination of a large ball and high grade chassis components makes it the ultimate solution for cursor control. It is the perfect solution for studio, medical and military applications, with the added option for backlighting for low-light applications.