Sandisk 8GB M2 Memory Stick Micro (SDMSM2-008G-K, Bulk Package) 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