OUTEMU blue switches provide you clicky and tactile feedback to improve typing speed and accuracy. Give you an edge over gaming competitors with accurate response. 6 backlight themes and 18 backlight modes allow you to type in the dark. You can adjust its brightness with Fn + Up/Down. Arrow Key in any non-breathing mode. Providing 8pcs spare switches, including blue,brown,red and black switches for you to try the different mechanical key switches to enjoy the special experience.