The G502 X is the product of the legendary G502 series. Designed and invented with gaming technologies, including the optical-mechanical Lightforce switches. Incredible speed and reliability combined with precise actuation. Groundbreaking optical-mechanical hybrid switches enable even higher speeds and greater reliability through optical actuation. Thanks to the mechanical activation, the clear tactile feedback that gamers love is preserved. The gaming sensor achieves microscopic precision completely free of smoothing, filtering, and acceleration. With superior sampling and intelligent energy usage, Hero 25K delivers unmatched performance, energy efficiency, and precision. The legendary design of the G502 features a thin-walled outer skeleton for minimal material use and maximum stability, a lighter scroll wheel, and more. Logitech has designed the DPI switch so you can choose the right configuration that suits your grip and play style. Removable and reversible for closer proximity to your thumb or replaced with the included cover. In hyper-fast mode, the even lighter wheel spins freely. With a simple click, you switch to the stepped mode for precision scrolling. The wheel can tilt left and right: this gives you two additional control functions that you can program freely.