ProGrade Digital developed microSDXC, UHS-II memory cards for use in popular aerial and action cameras. Cards are tested like a full-size SD card and can be used in DSLR and mirrorless devices.  They also provide UHS-I DDR-104 and U3 speed class ratings which ensures maximum compatibility in all applications from single-shot stills to high-resolution 4K videos. Capacities range from 64GB to 256GB and performance levels provide read data transfer speeds up-to 250MB/second - ideal for quickly off-loading lots of content from the card to the workstation.