Logitech Wireless Mouse M185 - Silver Plug-and-play wireless: Get a reliable connection from a convenient Nano receiver (found in the package adjacent to the batteries) 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) Logitech reliability: Made by the global leader for mice and backed by a 3-year limited hardware warranty Contoured shape: Gives you more comfort and control For Windows and Mac computers: No software or setup hassles-start using your mouse right away