Kensington 64322 Studio USB Mouse Designed for Mac (PC/Mac) DiamondEye optical technology responds to your fastest movements with accurate tracking on virtually any surface Three programmable buttons let you launch functions with a single click Scroll sensor navigates long web pages and documents with the touch of a finger Backed by a five-year manufacturer's warranty and free technical support Precision feel and fingertip control is a perfect match for the Macintosh