That's because only SanDisk Extreme III memory cards feature innovative ESP Technology for the fastest speeds and highest performance. ESP stands for "Enhanced Super-Parallel Processing". Simply put, it means you are getting the fastest read/write speeds available -- an amazing minimum 30MB per second** sequential read and write speed -- speed you'll definitely appreciate whenever you find yourself shooting and storing pictures in harsh environments, extreme temperatures or at high altitudes.

Rely on SanDisk Extreme III cards when speed is critical to getting the right shot.

• Designed to meet the critical speed and performance needs of serious professional photographers lets you quickly capture, view, upload and transfer large image files
• Ideal for demanding photo shoots under severe weather conditions--heat, cold, wind, rain, snow, etc.
• Built to perform in the most extreme environments and temperatures rom -13º F to 185º F (-25º C to 85º C)
• Min 30MB/second** sequential read and write
• Durable, reliable and thoroughly tested temperature tested (heat and cold); shock and vibration tested (industrial-grade RTV included for CompactFlash)
• Dedicated, priority technical support hotline for direct customers of SanDisk Extreme products
• Included travel case keeps your memory cards organized
• Lifetime limited warranty***