Microsoft Wireless Optical Desktop 1000 System Requirements - Windows Vista, Windows XP, or Windows 2000; CD-ROM Drive and USB Port Includes two AA alkaline batteries for Keyboard and two AA alkaline batteries for mouse. Typical battery life 6 months for keyboard, 6 months for mouse. Media Center - With the touch of a button you can easily access your favorite music, video clips, and media programs. Wireless Freedom - Give yourself room to move with a wireless mouse and keyboard that lets you work without worrying about tangled wires. 6 months battery life - Long battery life helps ensure that you aren't stuck without your important tools when you need them.