Freecom Databar 4GB, DataBar. Internal memory: 4096 MB, Read speed: 8 MB/s, Write speed: 7 MB/s. Weight: 9 g. Input voltage: 4.4 - 5.25 V. Operating temperature range (T-T): 0 - 45 °C, Storage temperature range (T-T): -20 - 60 °C