Whether you're a professional photographer, videographer, or enthusiast, Lexar professional 1667x SDXC UHS-II cards make it easy to quickly capture and transfer 1080P full-HD, 3D, and 4K video. The cards leverage UHS-II technology (UHS speed Class 3 (U3)) to deliver High-Speed performance up to 250MB/s (1667x). This dramatically accelerates workflow from start to finish. For versatility, the cards also work with UHS-I devices at UHS-I speeds, and they're backwards compatible with older cameras and readers, performing at Class 10 speeds when used with non-UHS devices. Cards also come with a limited lifetime product support.