62G OF SWIFTNESS: Tired of the same-old honeycomb perforated chassis on a lightweight mouse? The M40E manages to clock in at just 62 grams while sporting a classic minimal design D2FC-F-K(60MN) MICRO SWITCHES: The top of the line micro switches offers crisp feedback with short travel, all while boasting a 60 million click lifespan PMW3389 OPTICAL SENSOR: The PixArt optical sensor is capable of 16,000 DPI, up to 1000Hz USB report rate, and a max tracking speed of 400 IPS, making M40E the ultimate gaming mouse to achieve speed, accuracy, and responsiveness I-ROCKS SOFTWARE SUPPORT: Our highly customizable software allows you to tweak the mouse to your liking. Adjust everything from DPI, cursor speed, mouse acceleration, polling rate, to RGB lighting, double click speed, and surface calibration. You can even assign commands to the buttons to perform tasks. With onboard memory, you can save your settings and macros without having to turn on the software ON-THE-FLY DPI ADJUSTMENT B