Ontoured shape: Made to allow you to play for longer periods of time without getting tired High accuracy performance with a custom, gaming-grade native 16000 DPI optical sensor with 1 dpi resolution steps Replacement thumb grips: For a customized fit, select from three different thumb grip styles. Storage of profiles onboard: saves DPI settings, lighting effects, and macros so that your profile is accessible from any PC without the need for extra software or drivers. Left and right button switches that have been specially adjusted for gaming respond incredibly quickly and are rated for 50 million clicks. Use CORSAIR Utility Engine (CUE) to generate dynamic lighting effects and assign macros to any button. Enhance the accuracy and responsiveness of your playing surface's sensors.