SanDisk Extreme Pro CompactFlash up to 90 MB/s write speeds and UDMA-6 enabled. Extreme Technology with SanDisk"s Power Core Controller and Enhanced Super-Parallel Processing "ESP". Invented by SanDisk to increase the card"s performance level with less wear and tear-and it is sealed with RTV silicone coating for added protection against moisture and humidity. This card delivers professional performance.