Model Number: SDXC10N-064G Brand Name: OEM or Original Key Specifications/Special Features: SDXC cards allows for larger data storage and optimized performance● Identical in size to regular SD card but are only compatible with SDXC host devices● SDXC cards are not backward compatible with legacy SD format host devices● Form factor : 24mm x 32mm x 2.1mm● Capacity : 64GBto 128GB● Speed class rating : Class 2: 2MB/sec minimum data transfer rate Class 4: 4MB/sec minimum data transfer rate Class 6: 6MB/sec minimum data transfer rate Class 10: 10MB/sec minimum data transfer rateSDXC logo is a trademark of SD-3C, LLC