Specification 100% compatible with all devices designed to use Secure Digital cards as standard or extended data storage. This Secure Digital Cards have been designed to comply with current and future SDMI (Secure Digital Music Initiative) portable device requirements. Each card contains a write protect slide switch that provides protection against accidental overwriting or deletion of stored data for PDA's, MP3's, MP4's, Digital cameras and other portable devices.Speedy - 50x: 8.2MB/sec read rate - 7.7MB/sec write rateSmall - About the size of a postage stamp (24mm X 32mm X 2.1mm)Secure - Built-in write-protect switch prevents accidental data lossFlexible - Compliant with Secure Digital Music Initiative (SDMI) potable device requirementsEconomical - Low power consumption is easy on batteriesSimple - as easy as plug-and-playSupports Windows XP/2000/98/95/NT, Macintosh OS and OS/2 Warp.Operating Temperature -25?? to 80C / -13 to 185 FStorage Temperature -40 to 85C / -40?? to 185?? FVoltage 3.3v Plug & Play For Windows and Mac OS Compatibility Digital Cameras GPS, PDAs, mobile phones, MP3 players, Cameras