SanDisk Extreme III is the exceptional, unbeatable, best-in-class solution for professional photographers who demand a faster, more rugged and durable memory card. Designed to meet the critical speed and performance needs of serious professional photographers, SanDisk Extreme III has extremely fast read/write speeds and are ideal for demanding photo shoots under severe weather conditions. Premium travel case - allows you to organize your cards Lifetime limited warranty System Requirements - USB, Windows 2000 or XP, Mac OS X v10.1.2+