Designed for your sports camcorder, tablet, or smartphone, Lexar Professional 1800x microSDHC/SDX UHS-II cards make it easy to quickly capture play back, and transfer multimedia files, including 4K video, as well as the highest-quality movies, photos, and songs. The cards leverage UHS-II technology (UHS Speed Class 3 (U3)) to deliver high-speed performance-up to 1800x (270MB/s). 1 The cards also come with an SD UHS-II adapter for easy transfer between devices, and a microSD UHS-II USB 3.0 reader, allowing you to experience high-speed file transfer, right out of the box. 2 Cards include a lifetime copy of downloadable Image Rescue software and a limited lifetime warranty.