Adjustable 7 Colorful Illuminated Backlit Keyboard USB Wired Gaming Keyboard for Game and Night Worker Number of keys: 104 keys+6 function keys Special 7 colors LED backlight with 20 Kinds of Backlight Mode, full-color gradient, dynamic runout. Light brightness adjustable, with five sections:0%-25%-50%-75%-100%,Through the key "LIGHT+ / LIGHT -". Through the key "SWITCH MODEL", you can switch colors. Key life: 10 million times;Systems support: Windows 8, Windows 7, Windows Vista, Windows XP