The Adesso iMouse X3 Multi-Color 9-Button Programmable Gaming Mouse fulfills your ergonomic needs and provides top gaming grade specifications for your ultimate gaming experience. The mouse itself is equipped with 9 buttons each fully programmable with the user friendly programmable driver. It also has an adjustable weight system where users can remove different weight blocks tailored to their most comfortable level. Together with the programmable driver the LED lights provide lighting in dark environments and different lighting effects. In terms of physical structure the iMouse X3 is ergonomically contoured and provides both thumb and pinky rests ensuring maximum comfort during long-usage periods. Last but not least the iMouse X3 is equipped with gaming grade optical sensor with polling rate up to 1000 Hz providing precision and accuracy while you are in-game!