? intelligent connectivity this mouse is intelligent connectivity, no need to code, plug & play with 7 button ? adjustable dpi 1000/1600/2400/3200/7200, polling rate:500hz, dpi and polling rate settings are closely related to the game performance, high polling rate can possible reduce the likelihood of your movements being misinterpreted. ? professional design ergonomic design, internally and externally, to create the ultimate game concept, long-term use without fatigue. ? hotkey design the first button on the left is the free double-click button, and the second, the third button is the forward key and back key; more convenient to scan the web page and files. ? compatible system compatible with windows 7, windows 8, windows xp, vista, me, 2000, mac os, and other os