The Logitech® NX20 Notebook Optical Mouse is the simplest, most durable notebook mouse available. Just plug and play; the all-terrain optical sensor provides smooth tracking and maximum surface coverage in virtually any environment. When you¦re ready to move, Logitech¦s patent-pending, integrated cord-wrap feature enables you to wind the cord neatly into the mouse for easy packing. No tangles, no unraveling, no unreliable moving parts. Shock-resistant bodywork withstands bumps on the road, while the smooth, rounded shape provides the perfect balance of comfort and mobility.