4gb high speed sdhc memory card the sdhc specification was established to meet the growing demand for hd high definition video and high resolution image recording which require massive data storage capacityhigh speed sd memory card is ideal for every day use even for every day recording panasonic applies high speed 5mbs performance to each card up to 10mbs for 4gbthe sd memory card has the ability to freely copy general digital data and uses unique built in technology for storing and t