Meet the ERGO M575, a wireless trackball that offers easy thumb control. Forget about moving your mouse or arm to move the pointer. The ergonomic shape of the ERGO M575 minimizes movement and maximizes comfort while keeping the hand and arm relaxed. It is also ideal for small workspaces and crowded offices. Connects via Bluetooth Low Energy or with the USB receiver to the trackball offering a stable signal up to 10 meters.