Lexar GOLD Series Professional 1800x 256GB UHS-II U3 SDXC Memory Card - Lexar Lifetime Limited Warranty. High-speed performance - rated UHS Speed Class 3 (U3) and Video Speed Class 60 (V60) for your Professional DSLR and mirrorless cameras. Leverages UHS-II technology to deliver read speeds up to 270MB/s. Capture high-quality images and extended lengths of Full-HD and 4K video with write speeds up to 180MB/s. Designed for durability