Since the video and audio quality of high tech devices is constantly improving higher speeds and more storage space are also needed to store the high resolution digital imagestranscends sdhc cards conform to the new class 10 specification and offer transfer rates of up to 20 mbs with devices that support sd 30 this allows your device to respond very quickly when youre recording and viewing filesthe sdhc class 10 series offers more storage space and improved recording efficiency with supp