Logitech ERGO M575 Wireless Trackball Mouse, Black

Meet ERGO M575—a wireless trackball with incredibly easy thumb control and is part of the Logitech Ergo series that promotes increased comfort, lower muscle strain, and improved, more natural posture. Forget about sliding around a mouse or moving your arm to move the cursor. The ergonomic sculpted shape of ERGO M575 minimizes movement and maximizes comfort while keeping your hand and arm relaxed.