Minimize the number of movements and increase your comfort with ERGO M575 - a wireless ball manipulator with a contoured and ergonomic shape. Without having to move your hand to move the cursor, your hand and arm always remain relaxed. Thanks to smooth and responsive thumb control, the ERGO M575 trackball can be used anywhere - and because it doesn't need to be moved, it's ideal for use on desks with a small work surface.