Whether you’re a professional photographer videographer or enthusiast the 2 Pack of Lexar Professional SILVER Series 1667x SDXC UHS-II Cards lets you quickly capture high-quality photos including 1080p Full HD 3D and 4K video with a read transfer speed up to 250 MB/s. These 64 GB cards leverage UHS-II technology (UHS Speed Class 3/U3) for high-speed performance. This dramatically accelerates workflow from start to finish. For versatility the cards also work with UHS-I devices at UHS-I speeds and is backward compatible with older cameras and readers. This is a pack of 2.