The ultra-fast SD PRO Plus sets new standards for professional photography. All cards are specified for UHS-I speed class 3 (U3) and also meet Class 10. Thus, these memory cards are ideal for 4K UHD video recording and playback. The transfer rates of up to 95 MB / s read and up to 90MB / s write allow the transfer of data for a variety of purposes in the shortest possible time and maximize your shots cameras, continuous shooting and images in burst mode to take. SDXC memory card. 64GB capacity. Read speed 95MB per sec. Write speed 90MB per sec. Not backwardly compatible with SD only devices.