The Memory Stick Micro (M2) is designed to meet the growing storage needs of highly compact, multifunctional mobile devices. Exchange data with standard-size Memory Stick PRO compatible products by inserting the M2 into the adapter (not supplied). M2 is approximately one-quarter the size of Memory Stick PRO Duo media, and only about 1.2 mm thick. Because its dual-voltage it can be used with both mobile phones (1.8 volts) and Memory Stick PRO compatible products operating at 3.3 volts. Store up to 250 songs, 1200 photos and 3.5 hours of video.