Wave design with Constant Curve layout: Curved layout guides hands into just the right position.Ease and comfort: Cushioned palm rest makes work easier and fun more fun.Longer battery time: This feature gives you up to three years of battery life. (Battery life based on a calculation of an estimated 2 million keystrokes per year in an office environment. User experience may vary.).Logitech Unifying receiver: The tiny Unifying receiver stays in your notebook, so there's no need to unplug it when you move around. And you can easily add compatible wireless mice and keyboards to the same wireless receiver With its distinctive Wave design and Constant Curve layout, Logitech Wireless Keyboard K350 guides your hands into just the right position. You'll type with ease and confidence, but without having to re-learn typing on an unfamiliar layout.