The Wireless Desktop 2000 from Microsoft is an easy, safe, wireless, comfortable keyboard and mouse set that works with your Windows or Mac computer. The keyboard features a 104-key configuration and includes hot keys for frequently used functions, such as audio controls, zooming, and making calculations. The keyboard also features Taskbar Favorites buttons for use in Windows 7 as well as a Windows Start Button. The keyboard is battery-powered and can go 18 months before a battery-change is needed. Plus, there's a low-battery light on the keyboard, indicating when you need to change batteries. For your security while you type, the keyboard utilizes 128-Bit encryption that is up to the Advanced Encryption Standard (AES). For comfort, you can rest your hands on the pillow-textured palm rest.