Full-size keyboard with whisper-quiet concave keys and adjustable tilt legsHand-friendly contoured laser mouse with soft rubber gripsTiny unifying receiver stays plugged in and can pair multiple patible wireless peripherals1-touch media controls on keyboard Keyboard can be stored standing up to free up spaceUp to 3 years battery lifeWorks with Windows XP Vista or 7 Includes Logitech Unifying receiver 3 AA alkaline batteries and receiver extender cable