San Disk Extreme PRO micro SDHC/micro Sdxc Uhs-I memory cards now come with up to 64Gb of storage for uncompromising smartphone, tablet and camera performance. Capture 4K Ultra HD and Full HD videos and enjoy transfer speeds of up to 100MB/s so you can shoot like a pro and still experience world-class responsiveness from your phone. Class 10 and UHS Speed Class 3 (U3)ratings mean your videos can meet today's highest resolution standards.