Product DescriptionThe Logitech Wireless Touch Keyboard K400 has a 10-meter (33 feet) wireless range and a large, built-in multi-touch touchpad for total control when connecting your laptop to your TV. System Requirements: Windows XP Windows 7 Windows Vista or Windows 8 / Windows 8 RT|USB portFrom the Manufacturer FeaturesLogitech Wireless Touch Keyboard K400For across-the-room control of your laptop-even when it's connected to your TVSay goodbye to hunching over your laptop and constantly getting up to navigate on your TV-connected laptop. Whether you?re IMing on your small screen or surfing the Web on your big screen, you can lean back and enjoy convenient typing and multi-touch navigation right from your couch. Whichever screen you?re using, this sleek wireless keyboard is designed for the way you use your laptop today * Wireless range may vary due to environmental and computing conditions.** Keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment. User experience may vary. Long-range wireless controlReliable Logitech Advanced 2.4 GHz wireless connection with up to 33 ft range* Control your TV-connected laptop from across the room Turn up the volume, pause or tweet about the movie you just downloaded-all without leaving the couch Comfortable, quiet typing Whisper-quiet low-profile keys Easy-to-read bold, bright-white characters Media hot keys like mute, play, volume up or down for easy entertainment control Sleek, compact design feels just right on your lap Keyboard can be stored vertically to save space Built-in large touchpad with intuitive Windows 8 gesture supportNo need for a separate mouse Large 3.5-inch touchpad with multi-touch navigation for easy horizontal and vertical scrolling Convenient left and right click buttons Plug-and-play simplicityNo cords, software or hassles Plug the Logitech Unifying wireless receiver into your USB port and start navigating Tiny receiver can stay in your laptop and connect up to six compatible Unifying wireless devices 12-month battery life**Go for a full year without changing batteries On-off switch helps you save power when you're not using the keyboard CompatibilityWhat's in the box?Wireless Touch Keyboard K400 Unifying USB receiver USB extender 2 AA batteries (pre-installed) User documentation Works with:Windows 8/Windows 8 RT, Windows Vista, Windows 7, Windows XP USB port