Since the video and audio quality of high tech devices is constantly improving a higher speed and more storage space is also needed in order to store the high resolution digital imagestranscends sdhc cards conform to the new class 10 specification and offer transfer rates of up to 20mbsec with devices that support sd 30 this gives your device a very quick response while recording and while viewing the filesthe sdhc class 10 series offers more storage space and improved recording efficie