Modern Design: Ultrathin and modern design complements your desktop. Media center: Control media playback from your keyboard. Built-in Number Pad: The keyboard is full-sized with a built-in number pad. Bluetooth Smart: Clutter-free and reliable experience utilizing the latest in Bluetooth 4.0 technology. BlueTrack Technology: Combines the power of optical with the precision of laser for remarkable mouse tracking on virtually any surface. BlueTrack Technology does not work on clear glass or mirrored surfaces. Keyboard Dimensions (L x W): 15.32 inches x 4.41 inches. Mouse Dimensions (L x W): 4.21 inches x 2.36 inches. What's in the box: Keyboard, Mouse, 4x AAA batteries. Ambidextrous design allows you to control your mouse in either hand