With its distinctive Wave design and Constant Curve layout, Logitech Wireless Keyboard K350 guides your hands into just the right position and conforms naturally to your fingers. Plus, the cushioned palm rest helps position hands comfortably and properly on the keyboard. Together, they can help you type with ease and confidence, but without forcing you to re-learn typing on an unfamiliar layout. And your keyboard is always ready when you need it. Thanks to its long battery life (up to three years), fast and reliable wireless, and the tiny receiver you can plug once and forget, wireless hassles are a thing of the past. Battery: 2 x AA batteries (pre-installed) .