With the SanDisk Extreme® SD UHS-I memory card, you save time transferring your media with read speeds up to 170MB/s and SanDisk® QuickFlow™4 technology (64GB - 256GB). Pair with a SanDisk® Professional PRO-READER SD and microSD™ for maximum speeds (sold separately). With burn speeds up to 90MB/s and U3 recording, you're ready to capture high-resolution, stutter-free 4K UHD video.1 Plus, it's built to withstand weather, water, shocks, and other less-than-ideal conditions, so you can be sure your footage will be perfect wherever you go. #13#10#13#10Perfect for capturing outdoor adventures, weekend getaways, or sporting events without missing a single frame. With UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings, the SanDisk Extreme® SD™ UHS-I card lets you record 4K UHD and Full HD video without interruption.