Most significantly is the 18+ month battery life, which is very handy for any wireless mouse.  The battery is also USB-rechargeable.  The mouse can be turned off to further conserve battery life, and boasts an auto-shutoff feature.

Another important feature is the small "Plug-and-Forget Nano-Receiver".  The receiver is so small that it barely protrudes from the notebook, making it practical and convenient to always leave in place, ready for use.

The mouse features an easy to attach/remove dock that can clip to the notebook for hassle-free transport.  With the mouse attached to a notebook, less time is required to pack-up and go since the mouse is already connected and ready.

The Logitech V550 Nano provides a 2.4 GHz wireless connection between the PC and mouse and new laser technology for smooth operation and ultra-fast scrolling on nearly any surface.

The Logitech V550 Nano cordless mouse for notebooks will soon be available for purchase from the Logitech site for around $59.99.