HP Input/Output devices provide additional desktop functionality for HP Business Notebooks. The HP USB & PS/2 Mouse is a two-button mouse with scroll wheel that provides the speed and accuracy of optical tracking in a simple, elegant design. It connects to standard USB ports and also come equipped with a USB to PS/2 adapter that converts from a USB Series connection to a PS/2 connection. The HP Optical USB Travel mouse delivers the convenience, comfort, and elegance of optical mouse operation in a miniature size - an ideal solution while on the road.