What is RTR (Real Time Response, 1x 2x 4x 8x) for?

RTR (Real Time Response) allows the users to define the repeat-response of their presses to be 1x, 2x, 4x, and 8x of the normal repeat-response for a keyboard.
Gamers are able to gain higher responsiveness from their keys, which allows the user to increase thier APM in RTS-games, and/or increase the pace of movement in FPS and racing games. This feature supports titles such as KartRider and Starcraft.