SanDisk 1GB M2 Memory Card with Adapter for Sony Ericsson (SDMSM2-1024A) Dual voltage operation; 1.8v for new Sony Ericsson mobile phones, 3.3v for Memory Stick PRO Duo compatible devices Controlled ejection design allows for easier removal Sony Magicgate encryption technology support Read/write: 10MB/sec read, 3MB/sec write