ATP ProMax II UDMA compatible 300x CF card is fully compatible with the next generation high end DSLR cameras from each manufacturer. For many professional photographers and photography enthusiasts, ATP is not just seeking "fast speed", but also incorporates advanced "reliability" and "weather resistant" into the product specifications. ATP ProMaxCF cards are designed to be dustproof for outdoor use. -Stable operation even in temperatures ranging from -6°F to 176°F (-25°C to 85°C). In addition, it is designed to prevent static electricity and is resistant to shock and vibration. When transferring card data to a PC, when combined with the ATP ProMax ExpressCard reader, it achieves speed up to 45MB/s. ATP flash memory cards comply with strict EC environmental standards RoHS directive.