specifications: corsair exclusive software automatically detects the center of gravity in real time, allowing you to adjust weight between 115g and 137g and fine tune balance to perfectly fit your gripa custom pixart pmw3391 native 18, 000 dpi optical sensor, adjustable in 1 dpi resolution steps, gives you total sensitivity customization and ultra accurate trackingbuilt with a comfortable contoured shape that naturally fits your hand, with high-performance rubber grips inspired by pro sports equipmentten fully programmable buttons let you customize your gaming, with the in game advantage of powerful macros and key remapsincludes two sets of weights with six mounting locations, offering 120 different weight and balance configurations for a precisely calibrated gaming experience