Bluetooth? is the most advenced cable replacemend technology today.

Get the most advanced features in a total desktop solution. The included Microsoft Wireless Transceiver for Bluetooth? works with your keyboard and mouse, providing a wireless range of up to 30 feet. And because Bluetooth sets the bar for the emerging wireless world, you can add other compatible Bluetooth devices.

hxxp://www.microsoft.com/hardware/keyboard/wodbt_info.asp