S-55 high reliability series SD memory card is a small form factor non-volatile memory card that provides high capacity data storage. Its aim is to capture, retain and transport data, audio and images, facilitating the transfer of all types of digital information between a large variety of digital systems. The card operates in two basic modes SDXC and UHS-I card modes and SPI mode. The SD Memory Card also supports SD Default and High Speed mode with up to 50MHz clock frequency as well as UHS-I modes DDR50, SDR12/25/50/104 with up to 208MHz clock frequency.