Sandisk Ultra Plus 64gb Microsdxc Class 10 Uhs-1 Memory Card Transfer read speeds of up to 100MB/s (Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.) Rated A1 for faster app performance (Results may vary based on host device, app type and other factors.) UHS Speed Class U1 and Speed Class 10 for Full HD video recording and playback (Full HD (1920x1080) video support may vary based upon host device, file attributes, and other factors.) Shockproof, temperature-proof, waterproof, and X-ray-proof (Card only)