Work in comfort and near silence with the KM5221W Pro Wireless Keyboard and Mouse Combo from Dell. With 2.4 GHz connectivity for the combo, you won't have to worry about cable management or cords being too short for your desk. The keyboard features a dedicated number pad and programmable function keys to streamline your workflow. The mouse is constructed to be ambidextrous with a symmetrical design and features a programmable click-scroll wheel to further enhance your productivity. To get started with the mouse and keyboard combo, simply plug in the included USB wireless receiver and you're ready to go. The keyboard requires two AAA batteries and the mouse requires one AA battery and can last up to 36 months.