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 capacity.High Speed SD memory card is ideal for every day use. Even for every day recording, Panasonic applies high speed 5MB/s performance to each card. (Up to 10MB/s for 4GB)The SD Memory Card has the ability to freely copy general digital data and uses unique built-in technology for storing and transferring copyrighted content. This feature, which uses CPRM technology, is key to enabling a new distribution system for music and other commercial media, because it assures a high level of protection against illegal copying.