SanDisk Extreme PRO® microSDHC™/microSDXC™ UHS-I memory cards now come with up to 64GB** of storage for uncompromising smartphone, tablet and camera performance. Capture 4K Ultra HD1 and Full HD videos and enjoy transfer speeds of up to 170MB/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) 1 ratings mean your videos can meet today’s highest resolution standards and will look stunning on the latest 4K Ultra HD TV screens and monitors. Generous storage capacities of up to 64GB mean you won’t run out of the memory you need to work, shoot and share. SanDisk Extreme PRO microSD UHS-I Memory Cards are waterproof, shock proof, x-ray proof and temperature proof to protect your memories from life’s mishaps2. Take your phone or tablet to the snow, to the pool or to the desert. Your card will survive, even if your device doesn’t.