The Wave design with Constant Curve layout guides hands into just the right position and conforms naturally to your fingers, helping you type with ease and confidence, but without having to re-learn typing on an unfamiliar layout. A cushioned palm rest helps position hands comfortably and properly on the keyboard. You’ll get up to three years of battery life*, which practically eliminates the need to change batteries, as well as the hassle, expense, and waste that go with it. An indicator light helps you keep an eye on your charge level. The tiny, Logitech® Unifying receiver stays in your notebook. There’s no need to unplug it when you move around, so there’s less worry of it being broken or lost. And you can easily add compatible wireless mice and keyboards to the same wireless receiver. Logitech® Advanced 2.4 GHz wireless connectivity gives you the reliability of a cord plus cordless convenience and freedom—fast data transmission, virtually no delays or dropouts, and 128-bit AES encryption.