This Panasonic 16GB SDHC Memory Card assures stable recording of MPEG2 video (DVD video quality) with standard definition quality. They comply with the Class 4 SD Speed Specification with a read-out Data Transfer Rate of up to 20MB/s, as established by the SD Card Association. Panasonic SDHC memory cards also feature a built in write protect switch that further ensures the safety of your data.