Shot speeds up to 90MB/s, transfer speeds up to 170MB/s [requires a compatible device capable of reaching such speeds, such as the 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/secPerfect 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 factorsCapture uninterrupted video with UHS Speed Class 3 (U3) and video Speed Class 30 (V30). 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 devicesBuilt for and tested in harsh conditions: Temperature Proof, Water Proof, shock Proof, and X ray Proof, Card only