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. • Logitech Advanced 2.4 GHz wireless connectivity with 10-metre range (33 feet)* • Large 9-cm (3.5-inch), built-in touchpad with multi-touch navigation & large left- & right-click buttons • Plug-&-play setup with Logitech Unifying receiver • Whisper-quiet, low-profile keys with bold, bright white characters & a UV coating • 12-month battery life** & on/off switch" • Keyboard • USB (Universal Serial Bus) receiver • USB (Universal Serial Bus) extender • 2 AA batteries (pre-installed) • User documentation • 3-year manufacturer’s guarantee & full product support"