Sony Memory Stick Pro DUO: 1) Capacities: 64MB, 128MB, 256MB, 512MB, 1GB and 2GB 2) Fast transfer rate for reliable copy/download/backup 3) High storage capacity 4) Non-volatile solid-state; no moving parts maximizes battery power. Data is not lost when power is turned off 5) Low battery consumption to maximize battery life in small portable devices 6) User selectable mechanical write protect switch on the exterior card casing 7) Operating shock rating of 2,000Gs, equivalent to a 10-foot drop to the floor 8) Security level complies with both current and future Secure Digital Music Initiative (SDMI) portable device requirements.