Professional-level performance you can trust Quickly capture and transfer high-quality photos and 1080p Full-HD, 3D, and 4K video, with a read transfer speed, up to 2000x (300MB/s). The cards leverage UHS-II technology (UHS Speed Class 3 (U3)) for high-speed performance. And with the included SD UHS-II card reader, you'll power through post-production with high-speed file transfer from card to computer. Shoot high-quality images and 1080p Full-HD, 3D, and 4K video Using a DSLR, cinema-quality video cameras or 3D camera, you'll be able to leverage the latest photo and video features available for shooting high-quality images and stunning 1080p Full-HD, 3D, and 4K video. Quickly transfer files with included SD UHS-II reader, dramatically accelerating workflow Using the reader that comes with the cards, you'll experience high-speed file transfer at UHS-II speeds. This dramatically accelerates workflow from start to finish, getting you back to capturing the action faster. Backwards compatible at the highest UHS-I speeds For versatility, the cards are also backwards compatible with UHS-I devices, performing up to the maximum thresholds of UHS-I speed capabilities. The cards also work with older, non-UHS-I devices, performing at Class 10 speeds. Rigorously tested All Lexar product designs undergo extensive testing in the Lexar Quality Labs, facilities with more than 1,100 digital devices, to ensure performance, quality, compatibility, and reliability.