SanDisk 4GB Memory Stick PRO Duo, Model SDMSPD-4096-A11. Features: Larger storage capacities (256MB, 512MB, 1GB, 2GBand 4GB) than standard Memory Stick cards. High-speed data transfer rate of 15Mbps** for DVD-quality video in real time. The fast transfer rates help prevent data loss when power is suddenly cut-off or if the media is removed accidentally. Advanced security with Access Control Function and MagicGate technology.