Take control using the Logitech Ergo M575S wireless trackball mouse. Its ergonomic design reduces forearm muscle strain by 25%, letting you work with more comfort. The smooth thumb control ensures precision, while the shape keeps your hand relaxed in a natural position. It tracks on most surfaces and connects through Bluetooth or the Logi Bolt Receiver. | Logitech Ergo M575S Ergonomic 2000 DPI Wireless Trackball Mouse - Black