The A4TECH Bloody B820R RGB Mechanical USB LK Gaming Keyboard is a gaming keyboard that features the LK optical switch technology. This technology uses optical detection to remove all input lag, which is able to obtain zero digital latency reacting with a speed of 0.2ms key response1. The keyboard has a gunmetal aluminum alloy panel top panel for a cutting-edge tech finish and provides stronger and more resistance to corrosion than common panel1. The keyboard has a full N-Key rollover which ensures each keypress can simultaneously register regardless of how many keys are being pressed or held down at a time including modifier keys (Shift, Control and ALT)1. The keyboard is spill-resistant with an exclusive advanced Nano-coating over the PCB board, protecting the PCB from corroding by wet air or caustic chemicals, prolonging your keyboard lifetime1. The keyboard has a smart water flow system with both drainage channels and holes set in precise position, ensuring the water flows out efficiently1. The keyboard has a self-customize RGB animation feature that allows you to customize freely 3 types of RGB Animation modes with 16.8 million color options, making your own unique “Self-Customize” RGB1. The keyboard has a preloaded 6 RGB lighting effects with 6 types of lighting effects preloaded in the keyboard by default. You can adjust the lighting effects by pressing the “FN” keys with “F12” keys to rotate without driver1. The keyboard has a memory backlight with 6 free driver RGB lighting modes2. The keyboard has a blue switch and a red switch option23. The keyboard is compatible with Windows 7, 8, 8.1, 10, and Linux operating systems3. The keyboard has a dimension of 132.08 x 444.5 x 38.1mm and weighs 1.08Kg3. The keyboard comes with a 1-year warranty