Kensington 72218 PocketMouse Limited Edition (LE) USB Mouse (PC/Mac) DiamondEye optical technology responds to your fastest movements with accurate tracking and precise guidance on virtually any surface Adjustable-length USB cable is retractable; eliminates all tangled cords Works right out of the box on both PCs and Macs Backed by a one-year manufacturer's warranty Comfort and performance of an optical desktop mouse with compact size and carrying convenience