Plug-and-play wireless: Get a reliable connection from a convenient nano receiver that stays in your computer. 1-year battery life: Go for a full year without a battery change (Battery life may vary based on user and computing conditions). Made by the global leader for mice. Contoured shape: Gives you more comfort and control. For Windows and Mac computers: No software or setup hassles-start using your mouse right away. Your choice of grey or blue.