Logitech K400 Wireless Touch Keyboard

10 m (33 ft) reliable, wireless range (wireless range may vary due to environmental and computing conditions) perfect for the living room
Large 3.5 inch, built-in multi-touch touchpad for smooth, precise navigation
Stylish, minimalist design with comfortable, low-profile keys
Plug-and-play setup, ?no software installation needed
1-year battery life (keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment, user experience may vary).

Specifications:
System Requirements:
Windows® XP, Windows 7, Windows® Vista or Windows® 8 / Windows® 8 RT
USB port

Warranty Information:
3-year limited hardware warranty

Package Contents:
Wireless Touch Keyboard
USB range extender
Unifying receiver
2 AA batteries (pre-installed)
User Documentation