Shot speeds up to 60MB/s, transfer speeds up to 100MB/s Perfect for shooting 4K UHD video and sequential burst mode photography (Full HD (1920x1080) and 4K UHD (3840 x 2160) video support may vary based upon host device, file attributes and other factors. See HD page on SanDisk site.) Capture uninterrupted video with UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) Built for and tested in harsh conditions: temperature-proof, waterproof, shockproof, and X-ray-proof (Card only. See product packaging or see official SanDisk website for more details regarding proof.)