Logitech ERGO M575 Wireless Trackball for Business (Graphite)

With science-driven design and easy thumb control, this graphite Logitech ERGO M575 Wireless Trackball for Business from Logitech is a wireless trackball mouse that is engineered to reduce hand movement. It enables the user to keep their hand and arm relaxed, compared with a traditional Logitech M510 mouse, which provides hours of comfort. It requires one AA battery (included).