SanDisk 4GB Extreme III CompactFlash Card Built to perform in the most extreme environments & temperatures from -13 F 185 F Designed to meet the critical speed & performance needs of serious professional photographerslets user quickly capture, view, upload & transfer large image files Ideal for demanding photo shoots under severe weather conditionsheat, cold, wind, rain, snow, etc Minimum 20 MB/second sequential read & write speed Data recovery softwareensures photos will always be there (even if user deletes them accidentally)