... , 4GB, 8GB, 16GB, 32GB,64GBRead speed10-15 M/S (USB2.0)Write speed5-8 M/S (USB2.0)StylesMetal, Plastic, Wooden, Diamond ... ,shape,etc)Operating Temperature :-32°F to 140°F (0°C to 60°C)Storage Temperature-4°F to 185°F (-20°C to 85°C) Working voltage ...