• With a wireless range of up to 10 metres (33 feet)• No need for a separate mouse—this compact keyboard has a large 9-cm (3.5-inch) built-in touch pad• Setup couldn’t be easier—you simply plug the tiny Logitech Unifying receiver into a USB (Universal Serial Bus) port• Whether you’re 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 laptop—even when it's 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) port—no 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.