Dane-Elec CompactFlash XS 4Gb. Internal memory: 4096 MB, Flash card type: CompactFlash (CF), Read speed: 6.15 MB/s. Weight: 11.4 g. Data retention: 10 year(s), Mean time between failures (MTBF): 1000000 h. Operating temperature range (T-T): 0 - 70 °C, Operating relative humidity range: 0 - 95 %