PNY Memory 8GB SD Card Optima. Internal memory: 8192 MB, Flash card type: Secure Digital High-Capacity (SDHC), Write speed: 14.4 MB/s. Operating temperature range (T-T): 0 - 55 °C, Storage temperature range (T-T): -20 - 65 °C, Operating relative humidity range: 0 - 95 % This is an auto-generated long summary based on the first three features of the first five feature groups.