Kensington 64480 Mouse-in-a-Box Scroll USB/PS2 Mouse (PC/Mac) Designed to work for both right- and left-handed users Two buttons and scroll wheel make navigation simple, allowing you to quickly scroll through long documents and web pages Guaranteed to work right out of the box on both PCs and Macs Backed by a five-year manufacturer's warranty and free technical support Ergonomic shape fits comfortably in your hand