Keycool II 84 Keys Portable Mechanical Gaming Keyboard (BLUE/RED/GREEN/YELLOW/WHITE LED Backlight Available) (Blue Switches, Green LED's+Breathing backlight)+gift! Original Kailh mechanical switches with a lifespan of over 30 million keypresses feel comfortable Dual IC process chip design,function More stable.Partitioning show personality backlit light effect,and a total of nine stalls with backlight off,you can freely adjust for LED intensity Multi-function key combinations,Easy-Access Multimedia Controls. 21 key over roll under USB and Full NKRO under PS2. Windows Keys disabled in GAME mode.