Kensington 64323 Iridio Optical USB/PS2 Mouse (PC/Mac) Ergonomically designed to work for both right- and left-handed users Two programmable buttons with MouseWorks software lets you launch functions with a single click Connects via USB/PS2 and is 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 Optical technology provides precision cursor control on most any surface, and doesn't require any cleaning