Lighting Effects: FN + F12 ( Solid / Breathing / Off ) Brightness: FN + ↑ / ↓, Customize your favourite game with 9 individually programmable keys., Press FN + F1 ~ F7 to apply multimedia hotkeys. Mute, volume - / +, play/pause, stop, previous/next track. Press Fn+F8 will disable the "Window" keys to avoid interruption during the game session. Instantaneous execution is guaranteed with the 1000 Hz ultra polling technology, giving you a response time of ultra-fast 1ms. Use a unique manufacturing process in which two pieces of plastic get moulded together. Ensures that the legends will never fade over time. It provides support and promotes a comfortable wrist position. Dual screws + dual springs + balancing bar equals stronger durability. Create your own macro keys with the Bloody KeyDominator software available for download at bloody.com.