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 warranty.