The SanDisk Extreme SD can handle even the most extreme needs of professional photographers. These cards are tested in temperature ranges from -13 to +185 degrees Fahrenheit so that they can be used to shoot photos in any weather condition. They are shock and vibration tested with industrial-grade RTV for rugged use. They function with a minimum of 9MB/sec sequential write speed, which allows for faster capturing of large image files to the card, and a minimum of 10MB/sec sequential read speed, which allows for faster viewing of images and transferring data to the card. A travel case for protection is included as well as RescuePRO, a mini-CD for data recovery if photos are accidentally deleted.