Forget the hassle, expense, and waste of frequent battery changes. Youll have up to three years of power. Logitech Unifying receiverthe tiny, wireless receiver that stays in your notebook and lets you add devices as you need them. Plug it. Forget it. Add to it. Learn more about the Logitech Unifying receiver. Hyper-fast scrolling one spin and you may never go back to an ordinary scroll wheel.