Manufacturer: SteelSeries Prime Wireless FPS Magnetic Optical Switches with 18,000 CPI RGB Lighting in Black March, April, May, June, July, August, September, October, November, and December 202120202019201820172016201520142013201220112010200920082007200620052004200320022002200120001999199819971996199519941993199219911990198919881987198619851984