NEW Rapoo Bluetooth 3.0 and 2.4G Dual Mode Wireless Optical Mouse (6610 Gray) Adjustable 500/1000 DPI high-definition tracking engine The ingenious intelligent switch between 2.4G mode and BT 3.0 mode Up to 9-month battery life with Rapoo's energy saving technology Plug-and-forget NANO receiver: no installation software or drivers required System Requirements: Windows XP, Windows Vista, Windows 7, Windows 8, Mac OS X 10.4 or later