High-speed performanceleverages UHS-II technology (U3) for a read transfer speed up to 150MB/s (1000x) Premium memory solution for sports camcorders, tablets, and smartphones Designed for high-speed capture of high-quality images and extended lengths of 1080p full-HD, 3D, and 4K video Backwards compatible with UHS-I devices, performing up to the maximum thresholds of UHS-I speed capabilities (SDR104) Limited lifetime product support for card Size: 256 GB Designed for your sports camcorder, tablet, or smartphone, Lexar Professional 1000x microSDHC/microSDXC UHS-II cards let you quickly capture, play back, and transfer multimedia files, including 1080p full-HD, 3D, and 4K video, with a read transfer speed up to 1000x (150MB/s). The cards leverage UHS-II technology (UHS Speed Class 3 (U3)) for high-speed performance.