Add precise control to your arcade cabinet with this flush mount USB track ball! Unlike many other trackballs, this track ball mounts flush to the surface of your control panel with 4 screws. Experience games like Crystal Castles with their original controls. This translucent pearl trackball is perfect for use with U-Track RGB LED kits. Compatible with any system that uses a mouse for input, including Raspberry Pis, Windows and Linux PCs, and Macs.