Wireless Touch Keyboard K400 offers lean-back wireless control of your laptop even when you're connecting it to your TV. You can control your laptop without getting up from the couch thanks to the 10-meter (33') wireless range. The large 3.5, built-in touchpad with multi-touch navigation makes vertical and horizontal scrolling intuitive. With a simple setup, just plug the tiny Logitech Unifying receiver into a USB port. No software is needed. You can even add five more compatible devices to the same receiver. The sleek, low-profile keys feel good and barely make a sound.