How to Use: Plug and play Light mode description: FN+?|=light effect switching FN+?{=light speed slow, FN+}?=light speed fast FN+;:=light brightness reduction FN+'=light brightness increase for WIN version and for OS X version interchange: FN+,<=for Win version FN+.>=for OS X version Specification: Item Type: Mechanical Keyboard Material: ABS Color: Black Connection Method: Support Type C Wired Light: Color Mixed Light, Multiple Luminous Modes Key Conflict: All Keys Have No Impact Ergonomics: Support Compatible System: for Windows2000, for ME, for XP, for Vista, for Win7, for HarmonyOS, for Win8, for Win10, for , for OS X Package List: 1 x Mechanical Keyboard1 x Key Puller 1 x Data LineCompatible System: Support for Windows2000, for ME, for XP, for Vista, for Win7, for HarmonyOS, for Win8, for Win10, for , for OS X. Type C Wired Connection: Type C wired connection, separate key and cable, plug and play, press all keys at the same time without conflict with each other, quick response. Four Switch Optional: Ergonomic design, four switch is optional, linear action switch, blue switch, red switch is suitable for gaming office. Brown switch is suitable for home office. Color Mixing: Color mixing, multiple light effects can be switched at will, light speed and brightness can be adjusted at will. 61 Keys: The optimized 61 keys layout still retains the functions of a complete keyboard, which is small and reasonable, which makes it simple and easy to carry.