SanDisk 512MB SD Secure Digital Memory Card;

Cryptographic security for copyrighted data based on proven security concepts from DVD audio - High transfer rate for fast copy/download - High storage capacity - Non-volatile solid-state; no moving parts maximizes battery power. Data is not lost when power is turned off - Low battery consumption to maximize battery life in small portable devices - User selectable mechanical write protect switch on the exterior card casing - New devices with SD Card slots will accept existing MultiMediaCards - Operating shock rating of 2,000Gs, equivalent to a 10-foot drop to the floor - Unfazed by drastic weather conditions ranging from blistering heat to freezing cold - Security level complies with both current and future Secure Digital Music Initiative (SDMI) portable device requirements