Key Features Up to 100MB/s** transfer speeds Load apps faster with A1 performance class UHS Speed Class U1 and Speed Class 10 for Full HD video recording/playback Ideal for Android-based smartphones and tablets Fast for better pictures, app performance and Full HD video SanDisk Ultra microSDXC and microSDHC cards are fast for better pictures, app performance, and Full HD video. Ideal for Android smartphones and tables, these A1-rated cards load apps faster for a better smartphone experience. With up to 400GB capacity, you have the capacity to take more pictures and Full HD video and capture life at its fullest. Built to perform in harsh conditions, SanDisk Ultra microSD cards are waterproof, temperature proof, shockproof, and X-ray proof. SanDisk Memory Zone App for Easy File Management Available from the Google Play store, the SanDisk Memory Zone app lets you view, access, and back up your phone s files in one location. It can also automatically move files from your device to your memory card to free up space. No More Worrying about What to Keep and What to Delete Shoot photos and Full HD video continuously without having to worry about running out of space. Capable of storing up to 24 hours of Full HD video, the SanDisk Ultra microSDXC UHS-I Card lets you shoot, save, and share without interruption.