The Razer Hydra PC gaming motion-sensing controllers are supplied with a compact base stationthat can compute the exact location and orientation of the game pads in yourhands, so you get an experience that"s like a mirror reflection of you in thegaming world. Play PC games in a whole new way with theseRazer Hydra controllers that put youright in the heart of the action.General:Product Type : Motion sensor and 2 game padsCompatibility : PCConnectivity Technology : WiredControls : Analogue stick, 4 action buttons, quick-fire triggersFeatures : Hyperesponse buttonsConnectivity:Interfaces : 1 x USB - 4 PIN USB Type ASystem Requirements:OS Required : Microsoft Windows Vista / XP / 7System Requirements Details : Windows XP/Vista/7 - HDD 35 MBMiscellaneous:Software Included : Portal 2, Sixense MotionPack DLC