Relax your arms and hand with the ergonomic design of the Ergo M575 Wireless Trackball Mouse from Logitech. Experience optimal control with the integrated trackball, allowing you to control the cursor with just your thumb, alleviating the need to move the mouse around your desktop. The ergonomic shape is sculpted to fit your hand, providing maximum comfort during prolonged use, making this ideal for users who have limited space and spend a lot of time on their computer.