The Pyra optical mouse from Roccat has 1600 dpi resolution, a 100 Hz polling rate and exceptional glide to give you even more control over your computer applications.General information:Optical : YesNotebook/Desktop : DesktopWireless : NoMac/PC : PCRequired configuration : Windows XP, Vista, 7USB 1.1 port or laterCD-Rom driveWeight : 90 gOther information : Resolution: 1600 dpiLag-free 100 Hz