With a wireless range of up to 10 metres 33 feet No need for a separate mousethis compact keyboard has a large 9-cm 3.5-inch Setup couldnt be easieryou simply plug the tiny Logitech Unifying receiver into a USB (Universal Serial Bus) port Whether youre surfing the Web or e-mailing a friend typing is just plain easy with sleek low-profile keys that feel good & barely make a sound You can go a full year doing the things you love without battery hassles Logitech Wireless Touch Keyboard K400. For wireless control of your laptopeven when its connected to your TV. You can control your laptop without getting up from the couch thanks to the 10-metre 33 feet wireless range. The large 9-cm 3.5-inch built-in touchpad with multi-touch navigation makes vertical & horizontal scrolling intuitive. Setup is simple too. You just plug the tiny Logitech Unifying receiver into a USB (Universal Serial Bus) portno software needed. You can even add five more compatible devices to the same receiver. The sleek low-profile keys feel good & barely make a sound. & you can enjoy it all for up to a year without the hassle of changing batteries.