Kensington 72212 PocketMouse Mini USB Mouse (PC/Mac) DiamondEye optical technology offers accurate tracking and precise guidance, with the additional convenience of no required cleaning Compact shape is comfortable for both right- and left-handed use 2.5-foot adjustable-length cord is retractable so no tangled cables Backed by a one-year manufacturer's warranty Mobile optical mouse with a retractable cord allowing for easy storage