The Premier Pro series of SDXC UHS-I Speed Class 3 (U3) high-speed memory cards delivers enhanced performance with read/write speeds up to 95/60 MB/s, fully supports the latest 4K2K photographic device, and enables professional grade ultra-fine high-quality images to be captured. With smooth transfering speed of large files, Premier Pro memory cards allows users to fully utilize the power of burst mode photography. The high performance, reliability, and durability of SDXC UHS-I U3 memory cards enables professional photographers and enthusiasts to capture every fantastic moment with the utmost precision. Capacity 64GB/128GB Standard SDA 3.0 Dimensions (LxWxH) 24 x 32 x 2.1 mm Weight 2g Operation Voltage 2.7V ~ 3.6V Performance Seq Read/Write speed up to 95/60 (MB/s) Compatibility Compatible with SDXC Card and SDXC USH-I Card enabled host devices Certifications FCC, CE, BSMI, VCCI Warranty Lifetime limited