SUMLINK 4000 DPI Wired Professional USB Gaming Mouse with 10 Programming Buttons LED Optical,Nano, Ergonomic and Plus Aluminium Base DPI(500 - 4000): You can move it at either fast or low speeds, and it will always respond on screen with exacting accuracy Perfectly designed to fit snugly under your palm, the ergonomic shape of the mice gives gamers the most comfortable gaming experience ever, especially during the most testing of battles Intuitive drag-and-drop software interface accommodates 27 user-definable commands via 10 programmable buttons over 3 modes With colorful LED breathing light design, you can adjust it for your like or close it Plus oversized Precision Aim button enables on-the-fly cursor sensitivity adjustment