SanDisk Extreme Plus 32 GB Class 10 UHS-I U1/U3 microSDHC Memory Card Storage Size: 32 GB Flash Memory Type: microSD High Capacity (microSDHC) Up to 80MB/s read speed and up to 50MB/s write speed The card may be labeled as either U1 or U3. U1 and U3 cards can be used in same devices, while U3 has an extra capability of recording 4K video