Microsoft Wireless Mobile Mouse 4000 - Graphite Hand Orientation: Both Hands Power Supply: 1 x AA Battery Operating Time: 10-Month Battery Life - Use your mouse without power interruption for up to 10 months on a single battery. Battery status indicator tells you when battery power is low Distance: 15 feet Operating System Supported: Windows 7, Windows Vista, Windows XP (excluding Windows XP 64-bit) Mac OS X, v10.4x–10.5x System Requirement: 1 USB Port; CD-ROM Drive Version: RF Wireless
