The K400 Plus TV Wireless Touch Keyboard from Logitech is a combination keyboard with built-in touchpad for typing while sitting back in a favourite chair or just surfing the net on TV. The wireless range of the keyboard is about 33 feet (10m) and features a 3.5-inch (diagonally) touchpad with easy vertical scrolling functionality. It works plug-and-play right out of the box, has an 18-month battery life, and works with many common operating systems (Windows, Android, Chrome).