The Lexar Professional 3500x CFast 2.0 card delivers a read transfer speed up to 3500x (525MB/s), which is three times faster than today’s fastest CompactFlash cards.* The card leverages these new speed thresholds to allow you to capture, store, and transfer high-quality photos and 1080p full-HD, 3D, and 4K video. *Up to 525MB/s read transfer, write speeds lower. Speeds based on internal testing. Actual performance may vary. x=150KB/s.