An extremely fast memory that accompanies you everywhere. Ultrafast PRO Plus microSD card from Samsung sets new standards for extreme sports and action photography. The card is compatible with UHS-I speed class 3 (U3) and Class 10 and therefore is perfect for 4K UHD video recording and playback. And with a stunning read speeds of 95 MB / s and a write speed of 90 MB / s, there is only a minimal delay in the transmission of files and at the photo shoot. SDXC memory card. 64GB capacity. Read speed 95MB per sec. Write speed 90MB per sec. Includes microSD adaptor to convert to SD size, for compatible devices. Not backwardly compatible with SD only devices.