Logitech Ergo M575 Wireless Trackball Mouse in Black

Minimize movement and maximize comfort with ERGO M575 - a wireless trackball with a sculpted ergonomic shape. With no need to move your arm around to move the cursor, your hand and arm stay relaxed. The smooth and responsive thumb control can be used anywhere - and since it doesn't need to be moved - ERGO M575 is perfect for tight desk spaces.