Microsoft Wireless Comfort Desktop 5050

_Ergonomist-Approved Comfort Curve Design
_Advanced Encryption Standard (AES) 128-Bit Encryption
_Built in palm rest
_Wireless Freedom and Convenience
_Customizable Shortcut Keys
_BlueTrack Technology - combines the power of optical with the precision of laser for remarkable tracking on virtually any surface.
_Designed for Comfort - in Either Hand