Logitech NEW ERGO M575 Wireless Trackball Mouse Easy Thumb Control Precision & Smooth Tracking Ergonomic Comfort Design Windows & Mac - Graphite: From the manufacturerPlay VideoMINIMIZE MOVEMENT, MAXIMIZE COMFORTThe sculpted ergonomic shape naturally fits your hand. With no need to move your arm around to move the cursor, your hand and arm stay relaxed.CLICK/SCROLL MORE NATURALLYKeep your fingers in a more natural and comfortable position wit