"Light effect mode: 1.Luminous characteristics: LED color backlight, more cool at night. 2. The keyboard backlight function is controlled as follows: FN+ESC button for light switching off function. 3. Can be configured into different kinds of language versions according to customer needs. 4. The keyboard supports running on Win 2000, Win XP, Win ME, Vista, Win7, Win8, Androed, Linux, Apple and other operating systems. FN combination function: Support multimedia function keys, the operation is as follows: (1).FN+F1 button: music player (2).FN+F2 key: volume decrement (3).FN+F3 button: increased decrement (4).FN+F4 button: mute (5).FN+F5 key: pause"