SanDisk Extreme Plus 64 GB Class 10 UHS-I U1/U3 microSDXC Memory Card Up to 80MB/s read speed and up to 50MB/s write speed Up to 64GB storage capacities, that provides plenty of space for your videos, photos, music, games, and other memory-intensive files Ideal for tablets, smartphones, and cameras. Moreover, the accompanying SD Adapter allows you also to capture and access data on the card with any camera, camcorder, tablet, or laptop that has an SD card slot The card may be labeled as either Class 10 / U1 (UHS Speed Class 1) or Class 10 / U3 (UHS Speed Class 3). Both U1 and U3 cards possess the same model number: SDSDQX-064G-A46A, and meet UHS-I bus interface read and writing speed specifications, and can be used in same devices Both U1 and U3 cards deliver fast-action 3D and Full HD video (1080p) recording and playback without interruptions, while U3 can also deliver 4K Ultra HD and Full HD video recording and playback. This listing is based on Class 10 / U1. If it arrives as a Class 10 / U3 card, your card will have an extra capability of recording 4K video