2 YEAR WARRENTY & I-ROCKS SOFTWARE SUPPORT: Our highly customizable software allows you to adjust DPI, cursor speed, mouse acceleration, polling rate, to RGB lighting, double click speed, and surface calibration. 6 ADJUSTMENT BUTTONS: Instantly adjust the sensitivity of your mouse by the fly DPI between 100 - 16,000 with onboard memory, you can quickly switch between different configurations. 16,000 DPI's PIXART OPTICAL SENSOR: Use PMW3389 OPTICAL SENSOR, companying 1000Hz USB report rate, and a max tracking speed of 400 IPS. 60 MILLION CLICKS LIFESPAN: With D2FC-F-K(60MN) MICRO SWITCHES, the top of the line micro switches offers crisp feedback with short travel. 62G OF SWIFTNESS: Tired of the same-old honeycomb perforated chassis on a lightweight mouse? The M40E is just 62 grams while sporting a classic minimal design.