MORE PICTURES, MORE MUSIC, AND MORE DATA! Don't just save your data, secure it with SimpleTech Secure Digital (SD) cards. SD features a write protect switch on the side of the card to prevent accidential overwriting of important data. SD also features cryptographic security for copyrighted data based on Secure Digital Music Initiative (SDMI) portable device requirements. SimpleTech Secure Digital is designed for unlimited compatibility with digital cameras, music players, and other devices that use Secure Digital (and MultiMediaCard). Features: Solid-state design Low power requirements for longer battery life Write protect switch Compatible with devices that use MultiMediaCards Hot swappable Quality components and 100% testing at our U.S. manufacturing facility Use SimpleTech adapters and FlashLink USB reader/writer accessories to quickly transfer data to and from your computer Unlimited live technical support SD Memory Card Physical Layer Specification Version 1.01 Compliant SD Memory Card File System Specification Version 1.01 Compliant SD Memory Card Security Specification Version 1.01 Compliant (CPRM Based) SD and SPI Interface Supported Copyrights Protection Function 2.7V to 3.6V Power Supply