SanDisk Extreme IV - Flash memory card - 16 GB - CompactFlash (SDCFX4016G901) Professional-speed card featuring 45MB/s read/write speeds UDMA Enabled - a process which data can be moved from a storage device very efficiently, without laboring the host device's processor Extremely durable card tested to work under impact and in harsh temperature conditions Speed up your workflow by adding a FireWire Reader (sold separately) Priority technical support both online and via phone