Romer-G Mechanical Key Switches: Play with ultra-responsive keys that are up to 25% faster than the standard Customisable RGB Backlit Keys: Fully customise your gaming keyboard with individually backlit keys and use Logitech Gaming Software to unlock 16.8 million colours and different effects Arx Control: Enjoy in-game updates when you connect your iOS and Android devices Customisable RGB Backlit Keys: Fully customise your gaming keyboard with individually backlit keys and use Logitech Gaming Software to unlock 16.8 million colours and different effects Easy-Access To Media: Control your music as well as your gaming straight from your keyboard Fully Customisable: Use