Kingston Technology 4GB SDHC Class 2 Flash Card. Internal memory: 4096 MB, Flash card type: Secure Digital (SD), Write speed: 2 MB/s. Weight: 2.3 g. Input voltage: 3.3 V. Operating temperature range (T-T): 0 - 60 °C, Storage temperature range (T-T): -20 - 85 °C