Stop struggling with cords that catch and tangle. This keyboard features Logitech's patented digital radio technology, which provides the performance of corded peripherals without requiring a clear line of sight or pointing keyboard at the computer. Plus, you'll get three extra keyboard buttons to let you visit web sites, open e-mail, search the Internet, or launch your favorite applications. No cords, no clutter, no hassle Customizable buttons to enhance productivity Smart power management keeps batteries working for months For Windows and Macintosh