Sandisk 4GB M2 Memory Stick Micro (SDMSM2-4096) & BlueProton USB 2.0 Card Reader Writer Sandisk 4GB Memory Stick Micro M2 & BlueProton USB 2.0 3in1 Card Reader Includes Memory Stick PRO Duo adapter for universal compatibility with M2 slots and Memory Stick PRO Duo slots Dual voltage operation; 1.8v for new Sony Ericsson mobile phones, 3.3v for Memory Stick PRO Duo compatible devices Capacity: 4GB Read/write: 10MB/sec read, 3MB/sec write Sony Magicgate encryption technology support