920-004536. . Features: Manufacturer's limited three-year warranty..Reliable 2.4 GHz wireless connection: A tiny  nano-receiver connects both the keyboard and mouse using just one USB port. Long battery life: Get up to 24 months of keyboard power and 12 months of mouse power without changing batteries (Keyboard and mouse battery life may vary based on user and computing conditions) Eight hot keys: Instantly access your movies, music, the Internet, e-mail, volume, play/pause and more All-in-one setup: Includes a full-size keyboard with quiet, low-profile keys plus a portable contoured mouse for comfortable control Plug-and-play simplicity for Windows PCs: Works right out of the box with Windows XP, Vista, Windows 7 and 8. No software installation required Features Manufacturer's limited three-year warranty. Includes With a robust long-range wireless connection and long-lasting power between battery changes, this sleek keyboard and mouse give you the everyday reliability of a corded setupminus the clutter.