RAZER Mamba Wireless Rechargeable Gaming Mouse Maximum dpi: 6400 dpi Operating System Supported: Windows 8/ Windows 7 / Windows Vista / Windows XP (32-bit)/ Mac OS X (v10.7-10.9) 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. Option: Wireless