This Play.com SDHC memory card has a high storage capacity and fast data transfer so that you can store your digital content such as high-resolution photos, high definition videos and more without the restrictions of memory card size and data write-speeds of the past.
Class is dependent on the write-speed of the card, the higher the 'Class', the faster the memory card. This card is Class 6.
Please check the device you are buying this card for is SDHC compatible. SDHC cards are not backwards compatible with standard SD Host devices.