For exceptional cursor control, choose the Kensington Orbit Optical Trackball . Put your expectations into orbit This highly accurate trackball is as easy to use as a regular mouse, but it stays in one place on your desktop, saving space and optimising ergonomics. Less arm movement is required for operation, meaning you can place your arm in the most comfortable position and leave it there. The Kensington Orbit Optical Trackball uses an optical tracking device that is less affected by dust than regular trackballs, reducing the need for regular trackball cleaning. It's ideal for video editing or other creative projects which require long hours of accurate mouse control, and often require extensive scrolling that would mean repeatedly lifting a regular mouse off the desk.