Dolgix 64gb Compact Flash (Cf) Card - 133x Capacity - 64GB Standardized - complies with CompactFlash Association specification standards Easy to use plug-and-play capability Speed  25MB/sec. read, 20MB/sec. write Operating Temperature  0 to 60 C / 32 to 140 F. Storage Temperature  -20 to 85 C / -4 to 185 F