Dolgix 64GB 266x Compact Flash (CF) Card Capacity - 64GB Standardized - complies with CompactFlash Association specification standards Easy to use plug-and-play capability Speed  50MB/sec. read and 40MB/sec. write Operating Temperature  0 to 60 C / 32 to 140 F. Storage Temperature  -20 to 85 C / -4 to 185 F