Lighting Features: LED color backlight, cooler at night. The keyboard backlight function is controlled as follows: FN + ESC key for shutdown function. Can be configured in different language versions according to customer needs. The keyboard supports running on Win 2000, Win XP, Win ME, Vista, Win7, Win8, Android, Linux, Apple, and other operating systems. FN Combination Function: Supports multimedia function keys, the operation is as follows: (1).FN+F1 key: music player (2).FN+F2 key: volume down (3).FN+F3 key: volume up (4).FN+F4 key: mute (5).FN+F5 key: pause Product Parameters: Name: One-handed Gaming Keyboard Product Model: V100 Product Interface: USB 2.0 Number of keys pressed: 35 keys Product line length: 1.6 m Operating voltage: VDD = 3.3V - 5.5V Working current: 100 mA Product net weight: 350g Product size: 26*18*4cm Package weight: 415g Package size: 26*19*4cm Precautions: If the keyboard is not working properly, check if the PS/2 or USB connector on the computer is normal or if the keyboard cable is broken. Avoid using the mouse and keyboard in environments with strong sunlight, overheating, or heavy dust.