Logitech M325 910-002965 Black Topography Tilt Wheel USB RF Wireless Optical Mouse Power Supply: 1 x AA Battery Operating Time: Up to 18-month battery life Operating System Supported: Windows XP, Windows Vista or Windows 7 Mac OS X 10.5 or later Linux kernel 2.6+ System Requirement: USB port Package Contents: Mouse Logitech Unifying receiver 1 AA battery (pre-installed) User documentation