The Adesso WKB-1100CB offers many features that proves the statement, "Big things do come from small packages." The mini-size keyboard and mouse will save its users space in their environments. With its wireless features, there are no tangling wires. Its membrane key switch provides a quiet typing experience with life cycle up to 5 million keystrokes. When both units are in inactivity, the battery saving feature will prolong their battery life extending their usage period. The keyboard itself also offers popular hotkey commands conviently located at your fingertips. Last but not least, the mouse's enhanced optical engine ensures navigating with precision. AAA battery included.