Sony 1 GB Memory Stick PRO Duo Flash Memory Card MSXM1GST 1 GB storage capacity with 940 MB available Minimum write speeds of 15 Mbps on Memory Stick PRO Duo enabled devices optimized with 4-pin parallel interface Included adapter allows compatibility with Memory Stick PRO media enabled devices Backwards compatible with most devices that use Memory Stick PRO Duo media Designed especially for compact digital cameras and the PSP Handheld Entertainment System