Class 10 Speed Rating for Seamless Full HD Video The SanDisk Ultra UHS-I card features a Class 10 and UHS Speed Class 1 (U1) rating, the highest video performance available for recording uninterrupted Full HD video. Flawless App Performance This card can retrieve stored data almost instantly, thanks to its up to 30MB/s read capability and fast bus interface. TheSanDisk Ultra microSDHC and microSDXCUHS-I cards offer faster app loading and smoother, more fluid app performance. Storage Capacities Up to 64GB This card has plenty of room to accommodate Full HD videos, MP3s, apps, and other memory-intensive mobile files. Available in sizes up to 64GB, it can store all the apps, music, and video you want. Android App for Easy File Management The included SanDisk Memory Zone app lets you easily view, access, and backup all of your digital files from your phone's memory, additional memory card, and cloud service all in one convenient place. Using the app, you can easily move files from your card to a number of cloud storage services. Durable Design SanDisk Ultra UHS-I memory cards can capture memories from -13 to 185 degrees Fahrenheit with a shockproof, waterproof, and X-ray-proof design. Your mobile device may not survive, but your SanDisk memory card will.