Razer Mass Effect 3 Blackwidow Ultimate Video Game Keyboard (RZ03-00381800-R3M1) Mechanical key architecture - for faster actuation and extended lifespan Individually backlit keys - for visibility under low light conditions Fully programmable keys + 5 additional gaming keys - with on-the-fly macro recording 10 Customizable software profiles - with on-the-fly switching Gaming optimized key matrix - for minimized ghosting Unlock the deadly Collector Assault Rifle and downloadable multiplayer content packs