LIGHTSYNC RGB: Personalize lighting for each individual key, customize lighting effects, and enjoy in-game integrations from a spectrum of ~16.8M colors with Logitech Gaming Software MECHANICAL SWITCH OPTION: GX Blue is ideal for those looking for the familiar ‘clicky’ switch and provides an unmistakable click when pressed. GX Blue delivers audible and tactile feedback just like the common, traditional switches gamers are used to USB: Plug in your mouse, flash drive or phone with convenience via the integrated USB passthrough port AL-MG: Aircraft-grade 5052 aluminum top case is anodized and brushed for a slim, premium design plus rigid durability FULL FUNCTION KEYS: Enjoy the media and lighting controls right at your fingertips. Use the FN key to control volume, play and pause, mute, toggle game mode, change lighting effects, and much more!