【Excellent Red Switch】: E-YOOSO mechanical keyboard uses red switches, 50 million keystrokes lifespan, 2.0mm Distance to actuation, 45g actuation force, easier to trigger, quiet click sound and fast action with minimal resistance, No paragraph sense, provide you with a quiet typing environment, red switch is the best choose using in office.❤ Multilingual keyboard with English, Russian layout keyboard, where Portuguese is compatible with Spanish【18 Backlight Modes】: E-YOOSO mechanical gaming keyboard has 18 backlight modes. You can switch different lighting modes by "FN2+9", you can also adjust light brightness by "FN2 + -/+". In addition, You can also enter custom lighting setup mode by "FN2+ ←". If you need't backlit then you can turn off by "FN2+0". The double-shot injection molded keycaps provide elegant and clear uniform backlight without glare.