Optical-Mechanical Gaming Keyboard Kaliber Gaming's HVER PRO X Optical-Mechanical Gaming Keyboard combines the exceptional feel and response of brown mechanical key switches with the speed of light. Building on the popular HVER PRO series of gaming keyboards, the HVER PRO X features per-key RGB backlighting, a spill-resistant board, and a slew of gaming features that put it on par with keyboards selling for nearly twice the price. HVER PRO X is fully programmable for macro functions, shortcuts, and more with the FREE Kaliber Gaming software that allows you to customize the RGB per-key backlighting to deliver a truly personalized gaming experience.