Komputerbay 256GB Professional Compact Flash card 1066X CF write 155MB/s read 160MB/s Extreme Speed UDMA 7 RAW Komputerbay 256GB Professional Compact Flash card 1066X CF write 155MB/s read 160MB/s Extreme Speed UDMA 7 RAW read up to 160MB/s, write up to 155MB/s Capture and store high-quality images and 1080p HD video with your DSLR camera Designed to meet the critical speed performance needs of serious professional photographers. Advanced file management Works with MagicLantern and allows firmware booting from the card