ADATA Premier Pro 64GB Read 90 MB/s and Write 85 MB/s SDXC UHS-I U3 Class 10 Memory Card (ASDX64GUI3CL10-R) The Next Professional Grade Specification: ADATA's latest Premier Pro SDXC UHS-I U3 grade memory cards are suitable for high efficiency D-SLR, D-SLM, and 4K digital cameras. A great choice for High-Definition Video Recording: The SDXC UHS-I U3's high speed rating specifications support high definition Full HD and 3D modes ,and make it ideal for 4K high resolution Ultra HD video recording. Ultra fast performance with high efficiency High Reliability and Long Durability: ADATA Premier Pro SDXC UHS-I U3 cards are equipped with built-in write-protect switch and automatic error correcting code (ECC) functionality and have passed extreme cold, high temperature, and X-ray stress-testing. Supports the latest 4K2K digital cameras and camcorders