Media-Friendly: The K400 Plus wireless touch TV keyboard gives you integrated, comfortable control of your PC-to-TV entertainment, eliminating the clutter of a separate keyboard and mouse Plug-and-Play: Simply plug the Unifying receiver into a USB port and the wireless touchpad keyboard is ready to go; adjust controls with Logitech Options Software to save preferred settings Power-Packed: Built with laid-back control in mind, this wireless TV keyboard has a reliable and long battery life of up to 18 months (2), including an on/off button to help it last even longer Wireless Freedom: Designed for seamless comfort and control, this external HTPC