Features： Advanced Features: All miniSD cards are bundled with an SD adaptor Built-in security features enable users to download, store and play secure content Capacities ranging from 128MB to 2GB Product Specifications: Operating Temperature: -13 to 185F Card Dimensions: 0.8" x 0.8" x 0.05" (L x W x D) Voltage: 2.7V to 3.6V Compatibility: Tested with a broad range of multimedia cell phones and convergent digital devices