X7 Gaming Mouse X710 Features:Advanced Smart-X7 Software-Performs a Complete Keyboard Simulation Interface for Players to Create and Set their Favorite Game Commands on the Mouse. Intelligent 4th and 5th Buttons-forward and backward 4 Colors Full Pacakge Image In Game 4 DPI Shift Ability with Color Indication DPI Levels: 400 - 600 - 800 - 1000DPI (NO DRIVER NEEDED!) High Scores(95) Tested by MiceJudge Software Specifications:OMRON Button 8,000,000 times Lifecycle Mouse line diameter 2.2mm Mouse line length 1.8 meters Mouse feet lifetime 2.5 million meters Big hand model:4.78"(L)X2.70"(w)x1.55"(H) Mouse weight:0.27 lb. Common hand model:4.5"(L)X2.3"(w)X1.6"(H) Mouse weight:0.26 lb. Package Weight: 0.79 lb. Package Contents A4tech X-710 Mouse SMART-x7 Driver(CD) USB or PS2 mouse port System Requirements Plug and Play for Windows98/ME/2000/XP(X64)/2003(X64)/MCE2005/Vista X86&X64