Microsoft Wireless Desktop 2000 Unlike standard keyboards, this one features Advanced Encryption Standard (AES), which can help protect your personal and business information by encrypting what you type. Enjoy the classically designed keyboard, with a pillow-textured palm rest for support and comfort. The desktop is completed with a wireless, full-size mouse that features enhanced side grips, four-way scrolling and Blue Track technology. Not only is this desktop secure, comfortable and convenient - it’s simple to use - just plug in the transceivers and you’re ready to go! Advanced Encryption Standard (AES) 128-Bit Encryption Taskbar Favorites Windows Start Button Pillow-Texture Palm Rest Comfort and control for either hand BlueTrack Technology Computer/Operating System: Windows 7, Windows Vista, or Windows XP (excluding Windows XP 64-bit) Supplied with 2 AAA alkaline batteries Specifications Attribute Value Model 2000 Wired/Wireless Keyboard Wireless Wired/Wireless Mouse Wireless Keyboard Type Standard Keyboard Layout QWERTY (UK) Normal Keys 105 Multimedia Keys Yes Built-In USB Hub No Mouse Tracking Method BlueTrack TM Technology Mouse Buttons 3 Colour Black Keyboard Dimensions 447 x 185 x 45.1mm Keyboard Height 45.1mm Keyboard Depth 185mm Keyboard Width 447mm