Capacity:25 Pack 16GB Sandisk SDHC 9-pin Class 4 min 15 MB/s Read and 4 MB/s Write speeds 2.7V to 3.3V voltage support 24mm x 32mm x 2.1mm SDHC Secure Digital High Capacity Card for digital cameras, video cameras, media players, and other flash devices Operating Temperature -13°F to 185°F (-25°C to 85°C) Storage Temperature -40°F to 185°F (-40°C to 85°C)