HP Wireless Optical Mouse

HP Wireless Optical Mouse ... wired peripherals, regains valuable workspace, and places advanced functionality and ergonomic ease of operation at the user's fingertips. The Wireless/Optical mouse has a convenient scroll wheel that accelerates Web and document navigation. The wheel also functions as a third button. The Wireless/Optical mouse does not require line-of-sight access to the receiver, so it works flawlessly even when blocked from the receiver by books and other objects.