The 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 port

Features
Logitech 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