The HP Wireless Keyboard & Mouse combines a cordless keyboard, cordless optical mouse, & USB (Universal Serial Bus) wireless receiver in a single package. This stylish set delivers the convenience, comfort, & elegance of wireless keyboard & optical mouse operation to your HP notebook. It reduces the tangle & clutter associated with wired peripherals, regains valuable workspace, & places advanced functionality & ergonomic ease of operation at the users fingertips. Convenient Internet & multimedia buttons, as well as special keys that support the Microsoft Windows operating system & applications let users get things done quickly. With quiet, tactile membrane switch technology, the HP Wireless Keyboard & Mouse supply a high level of comfort & stress-free responsiveness. The mouse has a convenient scroll wheel that accelerates Web & document navigation. The wheel also functions as a third button. The keyboard & mouse do not require line-of-sight access to the receiver, so they work flawlessly even when blocked from the receiver by books & other objects. The wireless receiver, which plugs into an available USB (Universal Serial Bus) port, is dedicated to a particular keyboard & mouse; the ability to switch between multiple channels & user IDs allow other workers in the same office to use their HP Wireless Keyboard & Mouse set without interference.