Microsoft SideWinder X4 Keyboard Advanced anti-ghosting capability - Press up to 26 keys simultaneously without ghosting - what you press is what you get! Mode switching - Manually toggle from standard mode to one of two gaming modes; LEDs show the mode you select. Automatic profile switching - The keyboard detects the application you are running and applies your custom profile to the application. Programmable macro keys - Switch among three banks of six programmable macro keys to assign up to 18 macros per profile. Backlit keys - Adjust key-legend backlighting with three illumination levels plus "off".