Contoured shape: Designed so you can game longer without fatigue Custom, gaming grade 16000 dpi optical sensor: Ultra-accurate and high-speed tracking engine / Native 16000 dpi resolution, settable to 1 DPI steps, can be custom tuned to virtually any type of mouse pad Interchangeable thumb grips: Choose between 3 styles of thumb grips for a tailored fit Onboard profile storage: Saves lighting effects, macros and DPI settings for universal access to your profile on any PC, without the need for drivers or additional software Surface calibration tuning utility: Optimizes sensor precision and responsiveness for your playing surface All-new, high-performance Omron switches rated for 50 million clicks: Custom tuned for gaming, providing an ultrafast response and reliability over time Dynamic multicolor 3-zone backlighting: Customizable backlighting immerses you in the game by providing nearly unlimited lighting adjustability