ENTUS K550GC GENESIS I DIA Optical Switch Dustproof & Waterproof / ENTUS CJ Optical Switch Gaming / Keyboard (Standard) / Wired / Gold Plating / USB / Non-contact (Optical) / Gaming, Multimedia / N-key rollover / 1ms Response Time / Windows Key Lock / Full Key Lock / Step Sculpture 2 / ABS / Rainbow Backlight / Cherry-style Stabilizer / Water-resistant / Dustproof / Replaceable Switches / Plastic Cover / Keycap Remover / 440mm / 138mm / 38mm / 1240g