SANDISK SDCFX-512-7 Sandisk 512MB Extreme Cf Card (Retail Package) Up to 512MB storage capacity Compatible with all devices that accept CompactFlash media A minimum of 9MB/sec sequential write speed, which allows for faster capturing of large image files to the card / A minimum of 10MB/sec sequential read speed, which allows for faster viewing of images and transferring data to the card SanDisk Extreme CompactFlash cards are tested in extreme temperature ranges from -13 to +185 degrees Fahrenheit so that they can be used to shoot photos in any weather condition SanDisk Extreme CompactFlash cards are shock and vibration tested with industrial-grade RTV included, which is designed for rugged use