Mechanical Brown Switches: Offering the satisfying tactile typing experience, also being ever so slightly quieter, fitting for office or gaming use. And you will get 8 spare switches as a gift. 18 Backlit Modes: Press FN + INS-PgDn to enter Pro-gamer mode. RGB LED adjustable lighting with 6-themed backlights -18 lighting models. You can also adjust their brightness with FN+“?”and“?” Besides, there is a 9-color single backlit mode for this keyboard. N-key Rollover, Ergonomic And Durable Design: This keyboard is made of full metal material, with matte-finish texture, solid enough to protect it from scratch. It allows multi-keys to work simultaneously with high speed. Self-design & Removable Keycaps: The Redragon K556 features a custom designed keycap that has been made shorter to reduce the time it takes for your actions to register. Include a keycaps puller for clean or other needs. Wide Compatibility: Support computer system including Windows10, Windows 8, Windows 7, Mac OS X, Windows XP, Windows VISTA, etc.