M2 is approximately one-quarter the size of Memory Stick PRO Duo media, and only about 1.2 mm thick. Because it's dual-voltage it can be used with both mobile phones (1.8 volts) and Memory Stick PRO compatible products with adaptor (not included).
The new ultra-small memory card is designed to meet the growing storage needs of highly compact, multifunctional mobile phonessuch as K800i W300i K610i M600i Z530i V630i Z710i Z550i.