E-3LUE EMS639 4000 DPI USB Optical Wired Professional Gaming Mouse (Black) 5 color-pulsating illuminations which respective to various DPI levels,ergonomically designed the skin resemblance materials on the mouse,just deliver supreme tactile,coolest outlook,Compatible system: XP/Windows Vista/Wins 7/Wins 8/wins 10/Mac OS DPI:500/1000/2000/3000/4000,Polling Rate:125Hz/250Hz/500Hz/1000Hz,DPI and Polling Rate settings are closely related to the game performance,the best combination is the one which mostly suit play's response time,EMS639 has 20 combinations for its user. Avago 3090 gaming chip: Adopts Avago 3090 optical sensor,reputed as "the king of the optics"highest up to 4000DPI and 1000Hz polling rate,it provides extreme stability while gaming Omron Miro Switch:Omron is currently one of the best Miro Switch among the marketEMS639 adopted omron 3050 high sensitivity switches for expert gamer Super silent teflon mouse feet,perfect glides on almost any surface,all you can feel is smooth gaming experienc