Kensington Slimblade Trackball 72327, Black, Wired, Media Controls, Customizable Buttons, Scroll ball, Ambidextrous Design, Laser, Optical, Compatibility Windows 7, Windows 8, Windows 8.1, macOS 10.8, Windows 10, macOS X 10.11, macOS 10.10 or above, Chrome OS 44 or above, macOS 10.9, macOS Sierra 10.12. The low-profile shape along with the silver metallic finish offer beautiful aesthetics and ergonomic comfort. The trackball takes up less desk space than what is needed to operate a mouse and is more comfortable.