Shot speeds up to 90MB/s, transfer speeds up to 200MB/s [requires a compatible device capable of reaching such speeds, such as the SanDisk SD UHS-I card reader (sold separately)]. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. X = 150KB/sec Perfect for shooting 4K UHD video(1) and sequential burst mode photography (1)Full HD (1920x1080) and 4K UHD (3840 x 2160) video support may vary based upon host device, file attributes and other factors Capture uninterrupted video with UHS Speed Class 3 (U3) and Video Speed Class 30 (V30)(2). (2)UHS Speed Class 3 designates a performance option designed to support 4K UHD video recording with enabled UHS host devices. UHS Video Speed Class 30 (V30), sustained video capture rate of 30MB/s, designates a performance option designed to support real-time video recording with UHS enabled host devices Built for and tested in harsh conditions(3): Temperature-proof, waterproof, shock-proof, and X-ray-proof (3)Card only Rescue PRO Deluxe 2 data recovery software download offer (Registration required; Terms and conditions apply), for restoring accidentally deleted images