Full mechanical switches: lightning-fast response and ultra-durable lifespan of up to 50-million keystrokes. N-key rollover (nkro) over USB: never miss an action for precise control. 21 easy-to-reach macro keys: ultra-fast combo commands and on-the-fly macro recording. Software and plug-and-play hardware modes: easy customization via an intuitive interface or bring your favorite profile wherever you go. Manufacturers 2 year guarantee.