RAZER DeathAdder USB Gaming Mouse - World of Tanks Edition Maximum dpi: 6400 dpi Hand Orientation: Right Hand Operating System Supported: Windows 8 / Windows 7 / Windows Vista Windows XP (32-bit) / Mac OS X System Requirement: PC / Mac with USB port Internet connection (for driver installation) At least 35MB of hard disk space Razer Synapse 2.0 registration (requiring a valid e-mail), software download, license acceptance, and internet connection needed to activate full features of product and for software updates. After activation, full features are available in optional offline mode.